A client asks the nurse to describe what causes a murmur. What would be the correct response by the nurse?
"Poor electric impulse conduction through the heart
"Turbulent blood flow through the heart valves"
"Enlargement of the left ventricle."
"Weak contraction of the atria."
"Long-term systemic hypertension."
The Correct Answer is B
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.
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Correct Answer is B
Explanation
A. While posterior to anterior comparisons are used, they do not encompass the entire technique for auscultation.
B. Side-to-side comparison is the correct method as it allows for immediate assessment of differences between lung fields and helps to identify abnormal sounds effectively.
C. Interspace-by-interspace comparison is not a commonly recognized term for this method and can lead to confusion in technique.
D. Proximal to distal comparison is not specific to lung auscultation and does not effectively apply to lung assessment.
E. Top-to-bottom comparison may miss abnormalities in a specific region of the lungs; side-to-side is preferred.
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.