Heart Anatomy: Septum, Valves, and Aorta

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Questions and Answers

What is another term used to describe the interventricular septum?

  • Posterior LV wall
  • Septal wall
  • Lateral RV wall
  • Anterior LV wall (correct)

Which of these is NOT a component of the interventricular septum?

  • Inflow
  • Infundibular
  • Outflow (correct)
  • Trabecular

What distinguishes the leaflets of the mitral valve from those of the tricuspid valve?

  • The Mitral Valve leaflets are triangular.
  • The Mitral Valve leaflets are thicker. (correct)
  • The Mitral Valve leaflets are of equal size.
  • The Mitral Valve leaflets are thinner.

Which statement accurately describes the shape and connection of the mitral valve?

<p>Trapezoidal in shape, connects to the fibrous skeleton and paired LV papillary muscles via chordae tendineae (A)</p> Signup and view all the answers

What is the anatomical significance of the 'zona coapta' in the context of the mitral valve?

<p>It refers to the area where the mitral valve leaflets overlap for complete closure. (A)</p> Signup and view all the answers

Which of the following best describes the appearance of the aortic valve leaflets?

<p>Three equally sized leaflets (D)</p> Signup and view all the answers

Which structural feature is located outward adjacent to each cusp of the aortic valve?

<p>Sinuses of Valsalva (D)</p> Signup and view all the answers

What protects the coronary arteries during systole?

<p>The valve leaflets (C)</p> Signup and view all the answers

What is the typical diameter range of the aorta?

<p>2.5 – 3 cm (D)</p> Signup and view all the answers

What is the functional role of the aorta during the cardiac cycle?

<p>It acts as a reservoir for potential energy to aid diastolic perfusion. (D)</p> Signup and view all the answers

Which artery is the first to branch off of the aortic arch?

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

Which of these is NOT a branch of the aortic arch?

<p>Right Subclavian Artery (A)</p> Signup and view all the answers

Which term describes the tomographic plane that is equivalent to the echocardiographic views?

<p>Vertical long axis (A)</p> Signup and view all the answers

Which term describes the tomographic plane that is equivalent to the echocardiographic four-chamber plane view?

<p>Horizontal long axis (A)</p> Signup and view all the answers

In echocardiography, how is the left ventricle typically divided from base to apex for assessing coronary artery lesions?

<p>Into three segments: basal, mid-cavity, and apical (A)</p> Signup and view all the answers

The left main coronary artery (LMCA) typically supplies approximately what percentage of the left ventricle?

<p>90% (B)</p> Signup and view all the answers

What is the anterior interventricular sulcus' correlation to the LAD artery?

<p>The anterior interventricular sulcus provides the LAD artery a path down the anterior wall to the LV apex. (D)</p> Signup and view all the answers

A blockage in the left main coronary artery (LMCA) is often referred to as the 'widow maker' due to its high risk of mortality. Which of the following best explains why?

<p>It supplies most of the left ventricle; complete blockage leads to extensive damage. (A)</p> Signup and view all the answers

The left main coronary artery (LMCA) bifurcates into which two main branches?

<p>The left anterior descending artery and the circumflex artery (A)</p> Signup and view all the answers

Which cardiac structure is primarily supplied by left anterior descending (LAD) artery?

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

Which walls are served by the circumflex artery?

<p>All of the above (D)</p> Signup and view all the answers

Which region of the heart is predominantly supplied by the right coronary artery (RCA)?

<p>Inferior wall of the left ventricle (D)</p> Signup and view all the answers

In most patients, the right coronary artery (RCA) gives rise to what other artery?

<p>Posterior descending artery (D)</p> Signup and view all the answers

In approximately what percentage of individuals does the coronary circulation exhibit left dominance, wherein the circumflex artery gives rise to the posterior descending artery?

<p>20% (D)</p> Signup and view all the answers

What is the main function of the Coronary Sinus?

<p>Venous drainage from the left ventricle (C)</p> Signup and view all the answers

Which vessel directly contributes to the formation of the coronary sinus?

<p>Great cardiac vein (B)</p> Signup and view all the answers

While assessing a patient’s short-axis view at the basal level, which structures could be clearly identified?

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

When performing an echocardiogram in the parasternal long-axis view (PLAX), which of the following can be best evaluated when related to the coronary arteries?

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

A patient presents with an echocardiogram indicating wall motion abnormalities in the anterior septum and anterior free wall. Which coronary artery is most likely involved?

<p>Left anterior descending artery (LAD) (C)</p> Signup and view all the answers

If a patient's echocardiogram reveals wall motion abnormalities in the anterolateral and posterolateral walls, which coronary artery is most likely involved?

<p>Circumflex artery (Cx) (B)</p> Signup and view all the answers

A patient's echocardiogram indicates abnormal wall motion in the inferior septum, inferior free wall, and inferolateral segments of the left ventricle. Which coronary artery is most likely affected?

<p>Posterior descending artery (PDA) (A)</p> Signup and view all the answers

Which of the following statements best describes the influence of lesion location on wall motion abnormalities in the context of LAD occlusion?

<p>A distal lesion affects only the apex, while a proximal lesion affects the entire wall. (B)</p> Signup and view all the answers

When a myocardial wall segment is not thickening at all on echocardiography, how should it be graded?

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

Which term best describes a myocardial wall segment that, on echocardiography, barely thickens during systole?

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

How is a myocardial wall segment graded if it does not thicken and is pushed away by the wall opposite it?

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

In a short-axis view the ventricle is divided clockwise, beginning with the inter-ventricular groove into six segments. Which of the following is NOT one of those segments?

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

Which wall is NOT usually fed by the LAD (Left Anterior Descending)

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

If a sonographer has an image where they are showing the INFERIOR wall but need to show the ANTERIOR wall, which view is best to show the heart?

<p>Apical 4 chamber View (B)</p> Signup and view all the answers

A standardized nomenclature for tomographic imaging of the heart allows consistency of terms, segment to coronary anatomy.

<p>Correlation between different imaging techniques. (A)</p> Signup and view all the answers

Flashcards

Interventricular Septum

The anterior most aspect of the left ventricle, also known as the anterior LV wall.

Mitral Valve

Also known as the bicuspid valve, it has unequal sized leaflets that are thicker than the tricuspid valve.

Zona Coapta

Area where the leaflets of the mitral valve overlap when closed.

Aortic Valve

Lies at the aortic root, and has three equally sized leaflets: Right Coronary Cusp, Left Coronary Cusp, and Non-Coronary Cusp (Posterior).

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Walls of the Ao Root

Bulges outward adjacent to each cusp, forming the sinuses of valsalva.

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Ao Root

Home of the coronary arteries, protected in systole by the valve leaflets.

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Arantius' Nodule

Arantius' Nodule.

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Aorta

Comes off the left ventricle and has three branches: Innominate (Brachiocephalic) Artery, Left Common Carotid Artery, and Left Subclavian Artery.

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Aorta Measurement

Measure from the aorta at end of diastole from leading edge to leading edge.

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Left Main Coronary Artery

About 90% of the left ventricle is fed by this artery. A blockage here may cause death and destroy the left ventricle.

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Left Main Coronary Artery division

Divides into the left anterior descending (LAD) artery and the circumflex artery (Cx).

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Left Anterior Descending (LAD) Artery

Extends via the anterior interventricular groove (sulcus) down the anterior wall to (and sometimes around) the LV apex. Anterior LV wall , Anterior Septum, LV Apex

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Right Coronary Artery

Supplies the inferior wall, inferior ventricular septum, RV, SA Node and AV Node

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RCA branches into PDA

The posterior descending artery (PDA) also supplies Inferior Right Ventricle segments.

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Posterior Descending Artery (PDA)

lies in the inferior interventricular groove and in about 80% of patients have a right-dominant coronary circulation

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Left Ventricle Drainage

The great cardiac vein helps drain the left ventricle

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LV Segments

From base to apex the LV is divided into three segments to correspond to proximal, middle, and apical lesions of the coronary arteries: Basal, Mid-cavity and Apical.

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PLAX view

This is an important echo to use.

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