Cardiac Anatomy and Physiology Quiz

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Questions and Answers

What is the main function of the myocardium?

  • It separates the heart chambers.
  • It encloses the heart.
  • It protects the heart from infection.
  • It contracts to pump blood. (correct)

The tricuspid valve is located between the left atrium and the left ventricle.

False (B)

What are the atrioventricular valves?

The mitral valve and the tricuspid valve.

The outermost layer of the heart is called the ______.

<p>epicardium</p> Signup and view all the answers

Match the following heart valves with their descriptions:

<p>Tricuspid valve = Between right atrium and right ventricle Mitral valve = Between left atrium and left ventricle Pulmonary valve = Between right ventricle and pulmonary artery Aortic valve = Between left ventricle and aorta</p> Signup and view all the answers

Which of the following layers is the thickest in the heart?

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

The pericardial sac has two layers, the parietal pericardium and the risk visceral pericardium.

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

The amount of fluid in the pericardial space is about ______ milliliters.

<p>20</p> Signup and view all the answers

What is the primary function of the fluid in the pericardial space?

<p>To cushion and lubricate the heart (B)</p> Signup and view all the answers

The order of the layers of the heart from inside to outside is the epicardium, myocardium, endocardium, and parietal pericardium.

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

What are the blood vessels that supply oxygen and nutrients to the heart muscle called?

<p>Coronary arteries</p> Signup and view all the answers

The space between the parietal pericardium and visceral pericardium contains approximately ______ milliliters of fluid.

<p>20</p> Signup and view all the answers

Match the following components of the heart with their functions:

<p>Coronary arteries = Supply oxygen to the heart Coronary veins = Return blood from the heart muscle Endocardium = Inner lining of the heart Myocardium = Muscle layer of the heart</p> Signup and view all the answers

Where do the coronary arteries originate?

<p>At the base of the aorta (A)</p> Signup and view all the answers

The left and right coronary arteries are located on the inside of the heart.

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

What is the term for the small branches that come off the coronary arteries?

<p>Capillary beds</p> Signup and view all the answers

What is the role of the superior and inferior vena cava?

<p>To transport deoxygenated blood back to the heart (B)</p> Signup and view all the answers

The left side of the heart contains deoxygenated blood.

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

What are the two phases of the heart's cycle?

<p>Diastole and Systole</p> Signup and view all the answers

The blood travels from the right atrium through the _______ valve into the right ventricle.

<p>tricuspid</p> Signup and view all the answers

Match the following cardiac structures with their functions:

<p>Right Atrium = Receives deoxygenated blood Left Atrium = Receives oxygenated blood Right Ventricle = Pumps blood to the lungs Left Ventricle = Pumps blood to the body</p> Signup and view all the answers

Which valve is also known as the bicuspid valve?

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

The pulmonary veins carry deoxygenated blood to the heart.

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

What color is the blood represented on the right side of the heart, and why?

<p>Blue, because it is deoxygenated blood.</p> Signup and view all the answers

What is the purpose of the atrial kick?

<p>To forcefully push blood into the ventricles (B)</p> Signup and view all the answers

The tricuspid and mitral valves remain closed when the ventricles contract.

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

What are the two phases of the heart's systolic cycle?

<p>Atrial systolic phase and ventricular systolic phase</p> Signup and view all the answers

The blood from the right ventricle is forced into the ________ through the pulmonic valve.

<p>pulmonary artery</p> Signup and view all the answers

Match the following heart valves to their functions:

<p>Tricuspid valve = Prevents backflow to the right atrium Mitral valve = Prevents backflow to the left atrium Pulmonic valve = Allows blood flow from right ventricle to pulmonary artery Aortic valve = Allows blood flow from left ventricle to aorta</p> Signup and view all the answers

What percentage of blood in the ventricles comes from the atria during the diastolic phase?

<p>75% (A)</p> Signup and view all the answers

The left atrium receives blood from the pulmonary artery.

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

What happens when the atria contract?

<p>Blood is forced into the ventricles.</p> Signup and view all the answers

What causes the 'dub' sound in the heart?

<p>Closure of the aortic and pulmonic valves (B)</p> Signup and view all the answers

The normal stroke volume in adults is 50 milliliters.

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

What is cardiac output?

<p>The amount of blood pumped out of the heart each minute.</p> Signup and view all the answers

The normal heart rate in adults ranges from _____ beats per minute.

<p>60 to 100</p> Signup and view all the answers

If the heart rate is 74 beats per minute and the stroke volume is 70 milliliters, what is the cardiac output?

<p>5180 milliliters (C)</p> Signup and view all the answers

Preload is the amount of blood that fills the ventricles before they _____ .

<p>contract</p> Signup and view all the answers

Cardiac output is unrelated to blood pressure.

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

Match the following terms with their definitions:

<p>Preload = Amount of blood that fills the ventricles before contraction Stroke Volume = Amount of blood pumped out of the ventricles with each heartbeat Cardiac Output = Total blood pump per minute Afterload = Resistance the heart must overcome to eject blood</p> Signup and view all the answers

What is the main purpose of fluoroscopy in cardiac catheterization?

<p>To show internal body structures in real time (D)</p> Signup and view all the answers

A total blockage in the coronary artery will show a visible pathway when contrast dye is injected.

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

In balloon angioplasty, a _______ is inflated and deflated to break the plaque.

<p>balloon</p> Signup and view all the answers

What is injected to visualize blockages during cardiac catheterization?

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

Only inpatient cardiac catheterizations require blood tests before the procedure.

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

What should be monitored in patients undergoing cardiac catheterization due to the use of contrast dye?

<p>Kidney function</p> Signup and view all the answers

Flashcards

Heart Chambers

The heart has four chambers: right atrium, right ventricle, left atrium, and left ventricle.

Heart Valves

The heart valves control blood flow through the chambers.

Tricuspid Valve

Located between the right atrium and right ventricle.

Mitral/Bicuspid Valve

Located between the left atrium and left ventricle.

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Semilunar Valves

Pulmonary and aortic valves; they look like half-moons.

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Myocardium

The thickest heart muscle layer.

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Heart Layers

Epicardium (outer), Myocardium (middle, thickest), Endocardium (inner).

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Percardial Sac

The protective sac around the heart; made of two layers.

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Pericardial fluid function

Cushions and lubricates the heart during its contractions and expansion.

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Heart layers (inside to outside)

Endocardium, Myocardium, Epicardium, Parietal Pericardium. Visceral Pericardium

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Coronary arteries

Blood vessels that supply oxygen and nutrients to the heart muscle.

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Coronary veins

Blood vessels that carry blood away from the heart muscle.

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Coronary artery origin

Aorta

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Blood flow pathway

The route blood takes through the heart, starting from vessels returning blood to the heart.

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Heart Physiology

Study of the heart's functions, including blood flow, contractions, valve actions, and blood ejection.

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Coronary Artery Branches

The left and right coronary arteries further divide into smaller arteries and eventually into capillaries that supply the heart muscle.

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Superior Vena Cava

A large vein that carries deoxygenated blood from the upper body to the heart's right atrium.

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Inferior Vena Cava

A large vein that carries deoxygenated blood from the lower body to the heart's right atrium.

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Right Atrium

The heart chamber that receives deoxygenated blood from the vena cava.

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Pulmonary Artery

The vessel carrying deoxygenated blood from the heart to the lungs.

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Pulmonary Veins

The vessels carrying oxygenated blood from the lungs back to the heart.

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Left Atrium

The heart chamber that receives oxygenated blood from the lungs.

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Diastole

The heart's relaxation phase, where the chambers fill with blood.

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Systole

The heart's contraction phase, where blood is pumped out of the chambers.

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Fluoroscopy

An X-ray imaging technique that shows internal body structures in real time, like an X-ray movie.

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Cardiac Catheterization

A procedure that uses a catheter to reach the heart and visualize blockages by injecting contrast dye.

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Blood flow through the heart

Blood is pushed up from legs to abdomen, then to the heart's atria. Blood flows from atria to ventricles. Then from ventricles to lungs and body.

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Atrial Systole

The phase where the atria (top chambers) contract, forcing blood into the ventricles (bottom chambers).

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PCI (Percutaneous Coronary Intervention)

A procedure that treats blockages in coronary arteries by either widening the artery or inserting a stent.

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PTCA (Percutaneous Transluminal Coronary Angioplasty)

A part of PCI where a balloon is inflated and deflated to break plaque and widen the artery.

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Ventricular Systole

The phase where the ventricles contract, pumping blood into the arteries (out of the heart).

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Atrial Kick

The additional 25% of blood pushed into the ventricles during atrial contraction.

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Contrast Dye

A substance injected during cardiac catheterization to make blockages visible in X-ray imaging.

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Pre-Procedure Nursing Interventions

Nursing care before cardiac catheterization, including blood tests to assess kidney function and clotting ability.

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Tricuspid and Mitral/Bicuspid Valves

Heart valves that open to let blood flow from the atria to the ventricles, and close during ventricular contraction to prevent backflow.

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Post-Procedure Nursing Interventions

Nursing care after cardiac catheterization, monitoring vital signs, and ensuring patient comfort and safety.

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Pulmonary and Aortic Valves

Heart valves that open during ventricular contraction to allow blood to flow out of the heart into the lungs (pulmonary), and into the body (aortic).

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Heart Valves Importance

Heart valves prevent backflow of blood, ensuring blood only flows in one direction throughout the heart and body.

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Kidney Function Tests

Tests performed before cardiac catheterization to assess the patient's ability to excrete contrast dye.

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Heart Contraction Cycle

The coordinated contraction and relaxation of the atria and ventricles that pumps blood throughout the body.

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Stroke Volume

The amount of blood pumped out of the ventricles with each heartbeat, usually 70 milliliters in adults.

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Cardiac Output

The amount of blood pumped out of the heart each minute, calculated by multiplying stroke volume by heart rate.

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Heart Rate

The number of times the heart beats per minute, typically between 60-100 beats per minute for adults.

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Preload

The amount of blood in the ventricles before they contract. It affects how much blood is pumped out.

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Afterload

The resistance the ventricles must overcome to pump blood out of the heart. It's a factor affecting stroke volume.

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Tricuspid and Mitral Valves

Valves that open during ventricular relaxation to allow blood to flow into the ventricles.

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Aortic and Pulmonic Valves

Valves that close during ventricular relaxation and prevent backflow when blood exits the heart.

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Contractility

The strength of the heart's contraction, a factor determining stroke volume. Strong heart contraction means more pumping.

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Study Notes

Cardiac Anatomy and Physiology

  • The heart has four chambers: right atrium, right ventricle, left atrium, and left ventricle.
  • Valves separate the atria and ventricles (tricuspid and mitral valves), and the ventricles from the arteries (pulmonary and aortic valves).
  • The heart muscle has three layers: epicardium (outer), myocardium (middle, muscular), and endocardium (inner).
  • The myocardium is the thickest layer, responsible for contraction.
  • The pericardium surrounds the heart, containing fluid to cushion and lubricate.
  • Coronary arteries supply oxygen and nutrients to the heart muscle and coronary veins return deoxygenated blood.

Heart Valves

  • Tricuspid valve: between right atrium and right ventricle
  • Mitral (bicuspid) valve: between left atrium and left ventricle
  • Pulmonary valve: between right ventricle and pulmonary artery
  • Aortic valve: between left ventricle and aorta

Blood Flow Through the Heart

  • Blood enters the right atrium from the superior and inferior vena cava.
  • Blood flows through the tricuspid valve to the right ventricle.
  • Blood is pumped through the pulmonary valve into the pulmonary artery to the lungs.
  • Blood returns from the lungs via the pulmonary veins to the left atrium.
  • Blood flows through the mitral valve to the left ventricle.
  • Blood is pumped through the aortic valve into the aorta and to the rest of the body.
  • Atrial contraction contributes about 25% of the blood flow to the ventricles.

Cardiac Cycle

  • Diastole: relaxation phase, filling of the chambers
  • Systole: contraction phase, ejection of blood
  • Atrial systole: atrial contraction, forces blood into ventricles
  • Ventricular systole: ventricular contraction, forces blood into arteries
  • Lub-dub sounds: closing of the heart valves

Cardiac Output

  • Stroke volume: amount of blood pumped per heartbeat (typically 70 mL)
  • Heart rate: number of heartbeats per minute (typically 60-100 bpm)
  • Cardiac output: amount of blood pumped per minute (stroke volume x heart rate)

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