The nurse is asked to describe what the heart sound S2 represents. What would be the correct response by the nurse?
Closure of the pulmonic and mitral valves
Closure of the tricuspid and mitral valves
Closure of the aortic and pulmonic valves
Closure of the aortic and mitral valves
Closure of the pulmonic and tricuspid valves
The Correct Answer is C
A. The closure of the pulmonic and mitral valves corresponds to heart sound S1, not S2.
B. The tricuspid and mitral valves close with S1.
C. Heart sound S2 represents the closure of the aortic and pulmonic valves, signaling the end of systole and the beginning of diastole.
D. The mitral valve closes with S1, not S2.
E. The pulmonic and tricuspid valves do not correspond with S2.
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View Related questions
Correct Answer is B
Explanation
A. Poor electrical impulse conduction may lead to arrhythmias but does not cause a murmur.
B. A heart murmur is caused by turbulent blood flow, often through narrowed or leaking valves, creating an abnormal heart sound.
C. Left ventricular enlargement can contribute to other cardiac issues but does not directly cause murmurs.
D. Weak atrial contractions may lead to decreased cardiac output but not necessarily to a murmur.
E. While hypertension can affect the heart, it is not the direct cause of a murmur.
Correct Answer is ["A","B"]
Explanation
A. S4 is often considered a normal finding in older adults due to decreased ventricular compliance.
B. While it can be non-pathologic, it is more commonly associated with underlying conditions such as hypertension or heart failure.
C. The statement about being heard just after S2 is incorrect; S4 can be heard in various populations, particularly older adults.
D. An S4 sound is associated with a stiff or hypertrophied ventricle, not a dilated ventricle.
E. An S4 sound is not typically an expected finding in children; it is more common in older adults.