Veterinary Echocardiography Course

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What type of imaging does echocardiography primarily utilize?

  • X-ray imaging
  • Computed tomography (CT)
  • Ultrasound imaging (correct)
  • Magnetic resonance imaging (MRI)

The term 'echocardiography' is best described as which of the following?

  • Electrical activity mapping of the heart
  • Ultrasound imaging of the heart (correct)
  • Sound waves causing echoes in the body
  • The study of cardiology using only external methods

Why is echocardiography a valuable tool in veterinary and human medicine?

  • It provides real-time assessment of cardiac function (correct)
  • It completely eliminates the need for operator skill
  • It is invasive, providing direct access to the heart
  • It allows for direct visualization of extracardiac structures

Which of the following is a limitation of echocardiography?

<p>Inability to visualize extracardiac structures (B)</p> Signup and view all the answers

What information does the 'Brightness mode' (B-mode) in 2D echocardiography provide?

<p>Anatomy and function of the heart (C)</p> Signup and view all the answers

Which echocardiographic mode is primarily used to assess the function and timing of cardiac events?

<p>M-mode (C)</p> Signup and view all the answers

Hemodynamic information is best obtained using which echocardiography technique?

<p>Doppler echocardiography (D)</p> Signup and view all the answers

What is the primary benefit of using standardized imaging planes in 2D echocardiography?

<p>Reduces inter-operator variability (D)</p> Signup and view all the answers

In echocardiography, what does the acronym 'BART' stand for in color Doppler imaging?

<p>Blue Away, Red Towards (A)</p> Signup and view all the answers

Which echocardiographic view is often referred to as the 'five-chamber view'?

<p>Left apical five-chamber (A)</p> Signup and view all the answers

Which of the following best describes the purpose of Doppler echocardiography?

<p>To assess blood flow velocity and direction. (D)</p> Signup and view all the answers

What is the key advantage of the left apical view in Doppler echocardiography?

<p>It aligns the ultrasound beam parallel to blood flow direction. (A)</p> Signup and view all the answers

In M-mode echocardiography of the left ventricle, what does LVIDd represent?

<p>Left Ventricular Internal Dimension during diastole (A)</p> Signup and view all the answers

What does 'aliasing' refer to in the context of Doppler echocardiography?

<p>Fold-over artifact that occurs when the velocity of blood flow exceeds the Nyquist limit. (C)</p> Signup and view all the answers

What is the primary clinical significance of assessing the 'E' and 'A' waves in M-mode echocardiography?

<p>Evaluating diastolic function (A)</p> Signup and view all the answers

What does the Doppler shift measure in echocardiography?

<p>The change in frequency of moving objects (D)</p> Signup and view all the answers

How does the 'right parasternal long axis' view aid in echocardiographic assessment?

<p>Helps visualize the heart's length from base to apex, showing mitral and aortic valves. (B)</p> Signup and view all the answers

Which statement accurately contrasts Pulsed-Wave (PW) and Continuous-Wave (CW) Doppler?

<p>PW assesses a specific site, while CW assesses all velocities along a cursor. (B)</p> Signup and view all the answers

How does understanding the Doppler Effect contribute to echocardiography?

<p>It facilitates the assessment of blood flow velocities. (C)</p> Signup and view all the answers

Which echocardiographic approach is MOST affected by patient-related factors like body size and shape?

<p>2D imaging (A)</p> Signup and view all the answers

The term 'interrogation angle' is defined as:

<p>The angle between the ultrasound beam and the direction of blood flow. (C)</p> Signup and view all the answers

In the context of the heart, where would you expect to visualize papillary muscles?

<p>Left Ventricle (D)</p> Signup and view all the answers

What cardiac chambers are visualized from the 'Right Parasternal Short Axis' view at the 'Heart base with AV and LA'?

<p>Tricuspid Valve, Right Ventricle, Aortic Valve, Left Atrium (A)</p> Signup and view all the answers

In 'Right Parasternal Short Axis', what 2 structures form the 'Heart base with Ao and PA'?

<p>Aorta and Pulmonary Artery (B)</p> Signup and view all the answers

When performing 2D echocardiography via 'Left Apical Four-Chamber' view, what are the 4 heart structures that visualized?

<p>Left Ventricle, Right Ventricle, Left Atrium, Right Atrium (C)</p> Signup and view all the answers

Which of the following statements accurately describes the 'M-mode'?

<p>Captures the motion of cardiac structures over time, displaying a one-dimensional view. (D)</p> Signup and view all the answers

The Doppler shift principle enables the assessment of:

<p>Velocity and direction of blood flow. (A)</p> Signup and view all the answers

How does Color Doppler assist in evaluating blood flow in the heart?

<p>Illustrates speed and direction with color mapping. (C)</p> Signup and view all the answers

During a CW(continuous-wave) Doppler assessment, what does the spectral display show?

<p>A solid outline representing the blood flow profile. (B)</p> Signup and view all the answers

When acquiring a Pulsed-Wave (PW) Doppler signal, what does the spectral display illustrate?

<p>Hollow waveform capturing distinct velocity at a specified vessel location. (D)</p> Signup and view all the answers

If the ultrasound beam is aligned parallel to the direction of blood flow during Doppler echocardiography, how does it affect velocity measurement and accuracy?

<p>Optimizes velocity measurement, improves accuracy. (A)</p> Signup and view all the answers

What characterizes the aortic outflow profile in normal systolic flow when assessed by Doppler echocardiography?

<p>Rhythmic acceleration and deceleration during ejection. (A)</p> Signup and view all the answers

How does the mitral inflow profile typically appear during diastole on Doppler echocardiography?

<p>E peak followed by A peak representing phases of diastole. (B)</p> Signup and view all the answers

Which parameter does NOT impair the accuracy of hemodynamic assessment using echocardiography?

<p>Room color (C)</p> Signup and view all the answers

Which echocardiographic view is optimal for aligning the ultrasound beam parallel to the direction of blood flow, particularly for assessing mitral valve flow?

<p>Left apical (A)</p> Signup and view all the answers

An echocardiographer adjusts the pulse repetition frequency (PRF) to correct aliasing on a spectral Doppler display. Which of the following best describes the effect of this adjustment?

<p>Increases the Nyquist limit, allowing for accurate measurement of higher velocities (A)</p> Signup and view all the answers

In a patient with suspected aortic stenosis, which Doppler modality provides the MOST accurate assessment of the peak systolic velocity across the aortic valve?

<p>Continuous-Wave Doppler (B)</p> Signup and view all the answers

What are the advantages or disadvantages of M-mode?

<p>A and D (A)</p> Signup and view all the answers

By performing Doppler Echocardiography on Moving objects, what does this determine?

<p>A and B (C)</p> Signup and view all the answers

Which of the following best explains why modern cardiology relies heavily on echocardiography?

<p>Echocardiography can provide real-time assessment, good temporal and spatial resolution, and hemodynamic information. (C)</p> Signup and view all the answers

When performing echocardiography via the right parasternal short axis view at the heart base with the aorta (Ao) and pulmonary artery (PA), which anatomical relationship is MOST accurate?

<p>They jointly form the base, with the aorta cranially and the pulmonary artery caudally. (C)</p> Signup and view all the answers

During Doppler echocardiography, what does the term 'aliasing' refer to?

<p>Occurs when the Doppler shift exceeds the Nyquist limit, resulting in misrepresentation of velocities. (C)</p> Signup and view all the answers

In the formula $V = \frac{C \times f_d}{2(f_0) \times cos \theta}$ used in Doppler echocardiography, what does the $\theta$ (theta) represent?

<p>The interrogation angle (angle between the ultrasound beam and the direction of blood flow). (A)</p> Signup and view all the answers

Which of the following is a limitation of echocardiography that is directly related to patient characteristics?

<p>E and D. (E)</p> Signup and view all the answers

Which of the following is a primary goal of introductory echocardiography lectures?

<p>To enable immediate recognition of structures and findings in echo images during subsequent lectures. (C)</p> Signup and view all the answers

What is the underlying principle of echocardiography?

<p>Using ultrasonic waves to create images of the heart. (C)</p> Signup and view all the answers

Why is echocardiography considered advantageous compared to older methods of assessing the heart?

<p>It is a real-time, non-invasive imaging modality. (D)</p> Signup and view all the answers

What is the function of the multiple ultrasound units within an echocardiography probe?

<p>To transmit and receive reflected sound waves, forming a sector-shaped image. (B)</p> Signup and view all the answers

What information is uniquely provided by echocardiography that is difficult to obtain from standard X-rays?

<p>The condition of intraccardiac structures and real-time function. (A)</p> Signup and view all the answers

What makes the heart such a fascinating organ, requiring advanced imaging techniques like echocardiography?

<p>Its dynamic nature, intricate structure, and unique physiology involving constant cardiac cycles. (A)</p> Signup and view all the answers

Which of the following is a major limitation of echocardiography?

<p>Its ability to visualize structures is limited by patient-related factors and operator dependency. (D)</p> Signup and view all the answers

What is a key factor to consider when attempting to acquire echocardiographic images?

<p>Finding an acoustic window through the rib space to reach the heart. (D)</p> Signup and view all the answers

In the context of echocardiography, what does 'standardized views' refer to, and why are they important?

<p>Specific, consistent imaging perspectives that reduce variability and allow for common language in describing findings. (D)</p> Signup and view all the answers

What is the purpose of the 'tomographic brain' analogy when learning echocardiography?

<p>To understand how two-dimensional images are generated by slicing through the three-dimensional structure of the heart. (D)</p> Signup and view all the answers

In the 'Right Parasternal Long Axis Inflow-Outflow View' (five-chamber view), which cardiac structure might not always be visible?

<p>Right Atrium (C)</p> Signup and view all the answers

When acquiring a 'Right Parasternal Four-Chamber View,' what anatomical structure is excluded from the image compared to the five-chamber view?

<p>Aorta (C)</p> Signup and view all the answers

What anatomical landmark is characteristic of the 'Right Parasternal Short Axis Left Ventricle View' at the mid-ventricular level?

<p>Two Papillary Muscles (A)</p> Signup and view all the answers

In the 'Right Parasternal Short Axis View,' what structure is described as resembling a 'fish mouth'?

<p>Mitral Valve (A)</p> Signup and view all the answers

In the 'Right Parasternal Short Axis View at the Heart Base,' what structure is visualized that is critical for assessing chamber size?

<p>Aortic Valve (B)</p> Signup and view all the answers

For what purpose is the 'Right Parasternal Short Axis View at the Heart Base with the Aorta and Pulmonary Artery' primarily used?

<p>To visualize the entirety of the right heart structures and the pulmonary artery. (A)</p> Signup and view all the answers

When performing echocardiography from the 'Left Apical Window,' how does the orientation of the heart appear on the image, and why?

<p>Upside down, due to the probe being positioned near the apex of the heart. (D)</p> Signup and view all the answers

What key information does M-mode echocardiography provide?

<p>A one-dimensional representation of motion over time, useful for assessing cardiac events. (C)</p> Signup and view all the answers

When using M-mode to assess the mitral valve, what does the early opening of the mitral valve during diastole represent?

<p>Early Filling (B)</p> Signup and view all the answers

What causes the change in pitch (frequency) of a sound as a fire truck passes by, according to the Doppler effect?

<p>A shift in the frequency of the sound waves due to the truck's motion relative to the observer. (C)</p> Signup and view all the answers

During Doppler echocardiography, what component of blood primarily reflects sound waves back to the ultrasound probe?

<p>Red Blood Cells (A)</p> Signup and view all the answers

Why is it difficult to accurately detect blood flow when the direction of flow is perpendicular to the ultrasound beam?

<p>There is no Doppler shift, so the velocity cannot be determined. (D)</p> Signup and view all the answers

In Doppler echocardiography, what does the X-axis on the spectral display represent?

<p>Time. (D)</p> Signup and view all the answers

What does the location of the signal above or below the baseline on a Doppler spectral display indicate?

<p>The direction of blood flow relative to the probe. (A)</p> Signup and view all the answers

What is the BART acronym used for in Color Doppler imaging?

<p>Blue Away, Red Towards. (D)</p> Signup and view all the answers

Which type of Doppler displays a 'hollow' profile on the spectral display?

<p>Pulsed-Wave Doppler (C)</p> Signup and view all the answers

What is a key difference between Pulsed-Wave (PW) and Continuous-Wave (CW) Doppler regarding velocity measurement?

<p>PW Doppler provides velocity information at a specific location, while CW Doppler detects the highest velocity along the ultrasound beam without specifying location. (C)</p> Signup and view all the answers

Why is continuous wave Doppler used to interrogate high velocity blood flow?

<p>It is not affected by aliasing phenomenon and does not have a velocity limit. (B)</p> Signup and view all the answers

According to the lecture, what should one do to prepare for tomorrow's session on echocardiography?

<p>Review the 2D images and basic Doppler principles discussed in the lecture. (D)</p> Signup and view all the answers

What can be interpreted from the velocity of movement detected by the ultrasound?

<p>The direction of the moving object (B)</p> Signup and view all the answers

What is the main reason the left apical views are important during Doppler?

<p>They allow one to more easily detect a moving object that is more parallel to the ultrasound to get measurements. (B)</p> Signup and view all the answers

In the context of Doppler echocardiography, the term 'aliasing' refers to:

<p>A phenomenon where high velocities are undersampled, leading to a misrepresentation of the blood flow direction. (A)</p> Signup and view all the answers

Which factor is critical in acquiring optimal parasternal window images?

<p>Locating the heart near the sternum. (A)</p> Signup and view all the answers

Normally in systole, blood flows away from the probe through which structure?

<p>Pulmonary Valve (A)</p> Signup and view all the answers

Why is it important to have standardized views?

<p>So the descriptions of the findings are in a common language when looking at various views (C)</p> Signup and view all the answers

During a right parasternal short axis view, what would be seen at the level of the left ventricle?

<p>Two papillary muscles (C)</p> Signup and view all the answers

What is the other name for the 'Right Peristernal Long Axis Inflow Outflow View'?

<p>Five Chamber View (B)</p> Signup and view all the answers

A veterinary cardiologist mentions using the 'Beluga View' during an echocardiogram. Which standard view are they referring to?

<p>Right Parasternal Short Axis at the Heart Base with Aorta and Pulmonary Artery (A)</p> Signup and view all the answers

Which wave is being formed when blood flows from the right atrium back into the left ventricle during diastole?

<p>Atrial Contraction (D)</p> Signup and view all the answers

How do you decide you need continuous wave instead of pulse wave?

<p>The reason is totally the opposite, now the location is not specific, but the velocity is high, we should use continues wave (D)</p> Signup and view all the answers

What is the primary goal of today's lecture on echocardiography?

<p>To provide an introductory overview of echocardiography. (C)</p> Signup and view all the answers

What is a key reason echocardiography is valuable for assessing the heart?

<p>It provides real-time information about the heart's structure and function. (D)</p> Signup and view all the answers

What is a potential limitation of echocardiography?

<p>It can be limited by patient-related factors and is operator-dependent. (D)</p> Signup and view all the answers

In the context of echocardiography, what information does the 2D or 'Brightness mode' (B-mode) primarily provide?

<p>Basic visualization of heart structure and function. (B)</p> Signup and view all the answers

What information is primarily obtained from M-mode echocardiography?

<p>Single-dimension motion over time. (B)</p> Signup and view all the answers

What information does Doppler echocardiography provide regarding heart function?

<p>Information about blood flow velocities and hemodynamics. (A)</p> Signup and view all the answers

When performing echocardiography, where do you start to acquire diagnostic images of the heart?

<p>Ventrally towards the sternum through the parasternal window. (C)</p> Signup and view all the answers

Why is it important to standardize the views during echocardiography?

<p>To ensure consistent imaging and facilitate learning. (D)</p> Signup and view all the answers

When performing echocardiography, what is represented by the 'five-chamber view'?

<p>Visualization of all four chambers and the aorta. (D)</p> Signup and view all the answers

What anatomical structures are excluded from the four-chamber view compared to the five-chamber view?

<p>The aorta (A)</p> Signup and view all the answers

In echocardiography via Right Parasternal Short Axis, which view looks like a 'fish mouth'?

<p>Left Ventricle view with Mitral Valve. (D)</p> Signup and view all the answers

Which of the following describes the 'Beluga' view?

<p>Heart base with the Aorta and Pulmonary Artery. (C)</p> Signup and view all the answers

How does the orientation of the heart appear in images acquired from the left apical window?

<p>The heart appears upside down due to the probe's placement near the apex. (D)</p> Signup and view all the answers

How is blood flow direction indicated on a Doppler spectral display?

<p>By the location of the signal above or below the baseline. (B)</p> Signup and view all the answers

What is the main use of the left apical window during Doppler echocardiography?

<p>To better resolve the velocity of the blood flow and visualize complex three-dimentional shapes. (C)</p> Signup and view all the answers

How is the timing of cardiac events assessed using M-mode echocardiography?

<p>By visualizing the motion of structures over time. (C)</p> Signup and view all the answers

During M-mode assessment of the mitral valve, what does the early opening of the mitral valve during diastole represent?

<p>Early filling of the ventricle. (D)</p> Signup and view all the answers

Why should the ultrasound direction be parallel to the object when using Doppler?

<p>To maximize the reflection of sound wave back so you can detect the object better. (B)</p> Signup and view all the answers

How do the blood cells affect the ultrasound?

<p>Reflect the sound wave back to the probe. (D)</p> Signup and view all the answers

According to the Doppler effect, how does the frequency of a sound wave change as an object moves toward the observer?

<p>The frequency increases. (C)</p> Signup and view all the answers

In the context of Doppler echocardiography, what does the term 'Doppler shift' refer to?

<p>The change in frequency of the sound wave reflected by moving objects. (D)</p> Signup and view all the answers

On a typical Doppler spectral display, what does the X-axis represent?

<p>Time. (C)</p> Signup and view all the answers

What is the purpose of the BART acronym?

<p>To define the color code for blood flow direction in color Doppler imaging. (B)</p> Signup and view all the answers

In color Doppler imaging, what does it mean if blood flow is displayed in red?

<p>Blood is flowing towards the probe. (A)</p> Signup and view all the answers

What characterizes the aortic outflow profile in normal systolic flow when assessed by Pulse-Wave Doppler echocardiography?

<p>A hollow profile. (D)</p> Signup and view all the answers

When should clinicians be prepared for tomorrow's session?

<p>Review the 2D images, M-mode, and Doppler imaging. (A)</p> Signup and view all the answers

Based on the lecture, why is echocardiography considered such an invaluable tool in modern cardiology?

<p>It provides a comprehensive assessment of cardiac anatomy, function, and hemodynamics in real-time and non-invasively. (C)</p> Signup and view all the answers

Why might visualizing extracardiac structures be challenging with echocardiography?

<p>The location and depth of extracardiac structures often make them difficult to visualize clearly with ultrasound. (A)</p> Signup and view all the answers

When comparing Pulse Wave Doppler to Continuous Wave Doppler, what is the key difference between a hollow versus solid profile?

<p>Specific location versus region with highest velocity. (A)</p> Signup and view all the answers

When is using Continuous Wave (CW) Doppler useful?

<p>When you are trying to use maximum velocity. (C)</p> Signup and view all the answers

What is the relationship between frequency and pitch?

<p>Pitch is essentially the frequency of the sound wave. (B)</p> Signup and view all the answers

Why does modern veterinary cardiology depend so heavily on echocardiography?

<p>It allows real time, non-invasive access to the dynamics inside the heart. (C)</p> Signup and view all the answers

Why is it difficult to detect a moving object when the movement directions are perpendicular to the ultrasound wave?

<p>It's harder to get the ultrasound to reflect back. (B)</p> Signup and view all the answers

During a cardiac exam, why might a cardiologist choose to lay a patient on a table with a hole in it?

<p>To more easily reach underneath the patient, improve gravity-assisted image acquisition, and enable the heart to lean for better imaging. (D)</p> Signup and view all the answers

A beginning cardiology student is having difficulty accurately identifying structures within the 'Right Parasternal Short Axis View at the Heart Base'. What clarifying question might BEST help the student?

<p>Should I focus primarily on imaging the great vessels or the atrial chambers in this modality? Alternatively, what is the spatial relationship between all of the structures in this view? (C)</p> Signup and view all the answers

Imagine a scenario where you're trying to distinguish between a thrombus and a normal papillary muscle in the right ventricle during an echocardiogram. Which of the following techniques would MOST definitively differentiate the two?

<p>Using contrast-enhanced ultrasound to evaluate perfusion patterns. (A)</p> Signup and view all the answers

A veterinary student is attempting to master cardiac anatomy through echocardiography and asks for a strategy to cement their understanding of the standard views. What approach would MOST directly address this learning goal?

<p>Using a 'tomographic brain' approach to mentally 'slice' through the heart, correlating 2D images with 3D anatomy using real-time imaging and dissection references. (B)</p> Signup and view all the answers

Why is it important for veterinary students to learn basic echocardiography, even if they don't plan to specialize in cardiology?

<p>To understand reports, measurements, and images from specialists and other hospitals. (C)</p> Signup and view all the answers

What is the primary objective of the introductory echocardiography lecture?

<p>To introduce the principles of echocardiography and its clinical value. (B)</p> Signup and view all the answers

What is the function of the multiple ultrasound units contained within an echocardiography probe?

<p>To transmit and receive sound waves, creating a sector-shaped image of the heart. (C)</p> Signup and view all the answers

What is a unique advantage of using echocardiography compared to standard X-rays for cardiac assessment?

<p>Echocardiography provides information about the intraccardiac structures and blood flow. (C)</p> Signup and view all the answers

What primarily limits the ability to acquire high-quality echocardiographic images in some patients?

<p>Patient-related factors such as body size, shape, and chest conformation. (A)</p> Signup and view all the answers

Why is standardization of views important in echocardiography?

<p>To ensure all cardiologists acquire similar images for consistent interpretation and communication. (B)</p> Signup and view all the answers

What cardiac structures are visualized in the 'Right Parasternal Long Axis Inflow-Outflow View' (five-chamber view)?

<p>Right ventricle, left ventricle, left atrium, mitral valve, and aorta. (D)</p> Signup and view all the answers

In the 'Right Parasternal Short Axis View' at the mid-ventricular level, which anatomical landmark is typically observed?

<p>Two papillary muscles in the left ventricle. (B)</p> Signup and view all the answers

In M-mode echocardiography, what aspect of cardiac function is MOST directly assessed?

<p>Motion and timing of cardiac structures over time using a single ultrasound beam. (A)</p> Signup and view all the answers

How does the ultrasound machine determine if blood is moving toward or away from the probe using Doppler?

<p>By assessing the change in frequency of the sound wave reflecting off the blood cells. (A)</p> Signup and view all the answers

Why is it important to align the ultrasound beam parallel to the direction of blood flow when using Doppler echocardiography?

<p>To maximize the Doppler shift and accurately detect velocity and direction. (A)</p> Signup and view all the answers

On a typical Doppler spectral display, what information is represented on the Y-axis?

<p>Velocity. (D)</p> Signup and view all the answers

What information does the BART acronym provide in the context of color Doppler imaging?

<p>The direction of blood flow relative to the ultrasound probe. (B)</p> Signup and view all the answers

What key distinction differentiates Pulse Wave (PW) Doppler from Continuous Wave (CW) Doppler?

<p>PW Doppler provides velocity information at a specific location, while CW Doppler provides information along the entire ultrasound beam. (A)</p> Signup and view all the answers

In what clinical scenario would Continuous Wave (CW) Doppler be MOST beneficial compared to Pulse Wave (PW) Doppler?

<p>Estimating the pressure gradient across a stenotic valve with high-velocity flow. (C)</p> Signup and view all the answers

When performing echocardiography from the left apical window, how does the orientation of the heart appear and why?

<p>The heart appears upside down because the probe is positioned near the apex of the heart. (D)</p> Signup and view all the answers

A veterinarian is attempting to identify the 'Beluga View' during an echocardiogram but is unfamiliar with the term. What anatomical landmark are they MOST likely trying to visualize?

<p>A short axis view of the heart base with the aorta and pulmonary artery. (C)</p> Signup and view all the answers

During an echocardiogram, the veterinary cardiologist asks you to identify the 'mushroom view'. What anatomical landmark dictates the diagnostic relevance of this view?

<p>The presence of two papillary muscles in the left ventricle at a mid-ventricular level slice. (D)</p> Signup and view all the answers

What does the echocardiogram measure when the ultrasound beam is perpendicular to the direction of blood flow?

<p>The measurement becomes less accurate. (C)</p> Signup and view all the answers

While performing a cardiac exam, a cardiologist adjusts the table to include a hole so that the patient can lay on their side. What is the MOST likely reason for preferring this orientation?

<p>To allow an alternative scanning window for the ultrasound prove. (C)</p> Signup and view all the answers

Flashcards

What is echocardiogram?

Ultrasound imaging of the heart.

Echocardiography importance

Modern cardiology relies heavily on echocardiography.

Weaknesses of echocardiography

Patient-related factors, operator dependency, indirect hemodynamic assessment, can't visualize extracardiac structures.

2D 'B'rightness mode

Anatomy and function.

Signup and view all the flashcards

"M"otion mode

Function and timing of events.

Signup and view all the flashcards

Doppler echocardiography

Hemodynamic assessment

Signup and view all the flashcards

2D (B-mode) views

Pre-defined, standardized imaging planes

Signup and view all the flashcards

Right Parasternal Long Axis

Imaging plane to view cardiac structures.

Signup and view all the flashcards

Right Parasternal Short Axis

Imaging plane to view cardiac structures.

Signup and view all the flashcards

Left Parasternal Window

Imaging plane to view cardiac structures.

Signup and view all the flashcards

M-mode

Records single-dimension motion along the cursor.

Signup and view all the flashcards

Doppler Echocardiography

Detect the direction and velocity of moving objects.

Signup and view all the flashcards

Doppler Shift

Change in the frequency of a sound wave.

Signup and view all the flashcards

Aortic outflow profile

Aortic outflow during systole.

Signup and view all the flashcards

Mitral inflow profile

Normal diastole flow.

Signup and view all the flashcards

Color Doppler (BART)

Uses colors to visualize direction and velocity of blood flow.

Signup and view all the flashcards

PW vs CW

Profile: Specific location vs Unspecified

Signup and view all the flashcards

Who is Dr. Bernard Chi?

A newly qualified veterinary cardiologist.

Signup and view all the flashcards

Echo Definition

Using ultrasound to examine the heart's structure and function.

Signup and view all the flashcards

Echocardiography Advantages

Real-time visualization, no incisions, assesses internal structures and hemodynamics.

Signup and view all the flashcards

Table with a hole

Laying the animal on a table with a hole to allow easier access for imaging the heart.

Signup and view all the flashcards

Why standardize echo views?

To minimize variability in image acquisition and interpretation.

Signup and view all the flashcards

Long Axis View

Sector aligned with heart's long axis, images right ventricle, left ventricle, and aorta.

Signup and view all the flashcards

Four-Chamber View

Shows all four chambers without the aorta, providing a complete view of atrial and ventricular structures.

Signup and view all the flashcards

Short Axis View

Images aligned with the heart's transverse axis, from apex to base.

Signup and view all the flashcards

Mushroom View

Visualizes the left ventricle with two papillary muscles.

Signup and view all the flashcards

Fish Mouth View

Visualize the mitral valve opening between the left atrium and ventricle.

Signup and view all the flashcards

The Whale View

Visualizes both atria and the aortic valve.

Signup and view all the flashcards

Beluga View

Visualizes the aorta, pulmonary artery, and right heart structures.

Signup and view all the flashcards

Left Apical Window

Acquired at the apex of the heart, showing left ventricular structures upside down.

Signup and view all the flashcards

Doppler Effect

Blood cells moving relative to probe cause frequency shift.

Signup and view all the flashcards

Doppler object movement

Parallel is important for maximal Doppler shift detection.

Signup and view all the flashcards

Study Notes

  • The instructor, Dr. Bernard Chi, is a newly board-certified veterinary cardiologist and a new faculty member at Tufts University as of February 1st.
  • Echocardiography makes up approximately 85% of a cardiologist's work.
  • The goal is that students will be able to recognize echocardiogram images of specific conditions and interpret reports, measurements, and images from other practices

Echocardiogram Defined

  • Echocardiography uses ultrasound sound waves to image the heart.
  • An ultrasound probe emits ultrasonic waves that reflect off the heart and return to the probe.
  • Many ultrasound units make up the probe, allowing it to both send and listen for reflected sound waves to form a sector-shaped image of the heart.

Why Echocardiography is Needed

  • Cardiology utilizes echocardiography because the heart is dynamic and complex, with a unique physiology tied to the cardiac cycle.
  • The cardiac cycle includes diastole and systole in a specific order, and any disruption causes problems.

Applications and Advantages

  • Echocardiography is applicable to any species with a heart, including amphibians, fish, calves, pigs, and even brown bears.
  • Echocardiography provides real-time imaging, showing the heart's activity at the moment the probe is applied.
  • Prior to non-invasive imaging, diagnosis of heart disease involved inserting catheters into veins or arteries to measure pressures and injecting contrast for X-rays, which is now avoided with ultrasound.
  • X-rays primarily show the cardiac silhouette's shape and size, while echocardiography reveals intracardiac structures and function.
  • Modern ultrasound provides good temporal and spatial resolution and captures hemodynamic information like blood flow and velocities.
  • Echocardiography is essential for modern cardiology.

Weaknesses of Echocardiography

  • Image quality can be affected by patient size, shape, and chest conformation, which affects acoustic window.
  • Expertise is needed to acquire good, standardized images and interpret them, requiring significant training and experience.
  • Even among cardiologists, image acquisition can vary slightly between individuals.
  • Pressure measurements are estimates, and cardiac catheterization may still be needed.
  • Extracardiac structures, such as the aorta beyond its root, cranial and caudal vena cava, and pulmonary veins, are difficult to visualize.

Echocardiographic Exam Techniques

  • A full echocardiographic exam includes 2D (B-mode)
  • M-mode provides one-dimensional information.
  • Doppler assesses blood flow direction and velocity for hemodynamic information.

Two-Dimensional (B-Mode) Echocardiography

  • Images are obtained from both the right and left parasternal windows, with the patient often positioned on a table with a hole to allow easier access to the heart.
  • Standardized views reduce inter-operator variability, aid learning, and allow findings to be described in a common language.
  • When performing an ultrasound, it is helpful to imagine the image as a slice through the heart, similar to a heart dissection or necropsy.

Right Parasternal Long Axis Views

  • The ultrasound sector should be aligned with the heart's long axis.
  • The right side of the heart will be on the top of the image, and the left on the bottom.

Right Parasternal Short Axis Views

  • Achieved by rotating the probe 90 degrees, orthogonal to the long axis views, cutting through the heart in the transverse axis from apex to base.
  • Different levels from apex to base reveal distinct patterns and features.
  • At the mid-ventricular level is the left ventricle view with papillary muscles.
  • Above the papillary muscles, the mitral valve becomes visible.
  • Above the mitral valve, at the heart base, both atria are visible.
  • The highest level of the short axis is the heart base with aorta and pulmonary artery.
  • This view visualizes the entire right heart and structures in the right heart.

Left Parasternal Window

Left Apical Views

  • The heart appears upside down because the probe is near the apex.
  • Because the probe is on the left side, the first chamber visualized is the left ventricle.

M-Mode Echocardiography

  • M-mode records one-dimensional motion along a selected line (cursor) to assess timing of cardiac events.
  • A line drawn across the left ventricle in the mushroom view shows ventricular contraction with time.

Doppler Echocardiography

  • Doppler echocardiography uses the Doppler effect to detect blood flow direction and velocity for hemodynamic information.
  • The Doppler Shift is a change in frequency of sound waves due to movement between the source and object and provides information on the direction and speed of movement.
  • Frequency refers to the pitch of the sound.
  • The machine detects whether the object is moving away or towards the probe.
  • The machine determines how fast by the frequency shift.
  • Red blood cells reflect sound waves; when these cells move away from the probe, the reflected sound wave frequency decreases, and when they move towards, the frequency increases.
  • In order to apply the Doppler shift, the moving object needs to be parallel to the ultrasound.

Assessing Flows

  • Pulse Wave Doppler assigns a specific spot in the sector to detect velocity information at that location
  • Continuous Wave Doppler gives all velocity information along the sector.
  • Collar Doppler visualizes the direction and velocity in a color map overlaid on the 2D image
  • Pulse wave has hollow profile showing exact velocity
  • Continuous wave has has a solid profile
  • BART (Blue Away, Red Towards) is the color map used in color Doppler to indicate flow direction.
  • An early filling in the atrial contraction will cause the valve to open during diastole showing a red flow.
  • Pulmonary flow flows away from the probe and shows a blue color.

Course Highlights

  • The instructor encouraged students to review the lecture slides.
  • Review the 2D images, know the views, know what those structures mean
  • Basic Doppler basics and what the image means

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

More Like This

Use Quizgecko on...
Browser
Browser