AP Heart Anatomy Flashcards
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Questions and Answers

What is the visceral pericardium?

Adhering to the surface of the heart.

What are the correct layers of the heart, from superficial to deep?

Epicardium, myocardium, endocardium.

What are atrioventricular valves also called?

Cuspid valves.

What are the right and left atrioventricular valves also called?

<p>Tricuspid, mitral.</p> Signup and view all the answers

What do semilunar valves prevent?

<p>Backflow of blood into the ventricles.</p> Signup and view all the answers

Where does the most abundant blood supply go?

<p>Left ventricle.</p> Signup and view all the answers

What is branching of an artery as it progresses from proximal to distal called?

<p>Anastomosis.</p> Signup and view all the answers

Which cavity of the heart normally has the thickest wall?

<p>Left ventricle.</p> Signup and view all the answers

Which of the following is a semilunar valve?

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

What is the pacemaker of the heart?

<p>SA node.</p> Signup and view all the answers

Describe the flow of blood through the heart.

<p>Right atrium -&gt; Right atrioventricular (tricuspid) valve -&gt; Right ventricle -&gt; Pulmonary semilunar valve -&gt; Pulmonary trunk -&gt; Pulmonary arteries -&gt; Pulmonary veins -&gt; Left atrium -&gt; Left atrioventricular (mitral) valve -&gt; Left ventricle -&gt; Aortic semilunar valve -&gt; Aorta -&gt; Body tissues -&gt; Superior or inferior vena cava -&gt; Right atrium.</p> Signup and view all the answers

What is the rhythmic compression of the heart combined with effective artificial respiration known as?

<p>CPR.</p> Signup and view all the answers

Increased serum levels in the blood often indicate a recent myocardial infarction. What is this commonly monitored by?

<p>Troponins and C-reactive protein.</p> Signup and view all the answers

Why are cardiac muscles considered auto rhythmic?

<p>They are capable of contracting on their own in a slow, steady rhythm.</p> Signup and view all the answers

What are the free edges of the cuspid flaps anchored to?

<p>Papillary muscles of the ventricles by chordae tendineae.</p> Signup and view all the answers

What is a tiny bump at the end of a T wave usually referred to as?

<p>U wave.</p> Signup and view all the answers

What is the normal pattern of impulse conduction through the heart?

<p>SA node, AV node, AV bundle, Purkinje fibers.</p> Signup and view all the answers

What does an ECG P wave represent?

<p>Depolarization of the atria.</p> Signup and view all the answers

What masks the repolarization of the atria?

<p>Massive ventricular depolarization.</p> Signup and view all the answers

What does contraction of the ventricles produce?

<p>The first heart sound (lub).</p> Signup and view all the answers

The contraction phase of the cardiac cycle is referred to as systole.

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

Vagus fibers to the heart serve as accelerator nerves.

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

The QRS complex represents the repolarization of the ventricles.

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

Rapid ejection is characterized by a marked increase in ventricular and aortic pressure and in aortic blood flow.

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

Isovolumetric ventricular contraction occurs between the start of ventricular systole and the opening of the semilunar valves.

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

What are Purkinje fibers also known as?

<p>Subendocardial branches.</p> Signup and view all the answers

What are pacemakers other than the SA node usually referred to as?

<p>Ectopic pacemakers.</p> Signup and view all the answers

What is a complete heartbeat referred to as?

<p>Cardiac cycle.</p> Signup and view all the answers

A considerable quantity of blood, called the __________, normally remains in the ventricles at the end of the ejection period.

<p>Residual volume.</p> Signup and view all the answers

What is a swishing abnormal heart sound indicating incomplete closing of the valves or a stenosis known as?

<p>Heart murmur.</p> Signup and view all the answers

Study Notes

Heart Anatomy and Valves

  • Visceral pericardium adheres directly to the heart's surface.
  • Heart layers from superficial to deep: epicardium → myocardium → endocardium.
  • Atrioventricular valves, also known as cuspid valves, include the tricuspid (right side) and mitral (left side).
  • Semilunar valves, located at the exit of the heart, prevent backflow into the ventricles.

Blood Supply and Heart Chambers

  • The left ventricle receives the most abundant blood supply.
  • The left ventricle has the thickest wall to manage high-pressure blood flow.

Blood Flow Pathway

  • Blood follows this pathway: right atrium → tricuspid valve → right ventricle → pulmonary semilunar valve → pulmonary trunk → pulmonary arteries → pulmonary veins → left atrium → mitral valve → left ventricle → aortic semilunar valve → aorta → body tissues → vena cavae → right atrium.

Cardiac Rhythm and Function

  • The heart's natural pacemaker is the SA node.
  • Heart muscle is auto rhythmic, enabling spontaneous contractions.
  • Cardiac contraction followed by effective artificial respiration is known as CPR.
  • Increased troponins and C-reactive protein levels can indicate myocardial infarction.
  • During contraction, ventricles create the first heart sound (lub).

Electrical Activity

  • Normal impulse conduction: SA node → AV node → AV bundle → Purkinje fibers.
  • P wave in an ECG indicates atrial depolarization; U wave can appear after T wave.
  • Atrial repolarization is overshadowed by ventricular depolarization depicted in the QRS complex.

Cardiac Cycle and Phases

  • The contraction phase is termed systole.
  • Isovolumetric ventricular contraction occurs before semilunar valves open.
  • Rapid ejection is marked by high ventricular and aortic pressure, significantly increasing blood flow.

Potential Abnormalities

  • Ectopic pacemakers can cause cardiac rhythm abnormalities, differentiating them from SA node activity.
  • Heart murmurs indicate incomplete valve closure or stenosis.

Additional Terms

  • A complete heartbeat is referred to as a cardiac cycle.
  • Residual volume is the blood remaining in the ventricles post-ejection.

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Description

Test your knowledge of heart anatomy with these flashcards that cover important terms, definitions, and layers of the heart. This quiz will aid in understanding the structure and function of the heart, focusing on details like the pericardium and atrioventricular valves.

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