S3 heart sound is most commonly associated with which condition?

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Multiple Choice

S3 heart sound is most commonly associated with which condition?

An S3 heart sound reflects rapid, early filling of a dilated or volume-overloaded ventricle. It happens just after the second heart sound when the ventricle suddenly accepts a large volume, producing a low-frequency gallop. This pattern is most characteristic of systolic dysfunction with left ventricular failure, i.e., congestive heart failure, where the ventricle is enlarged and compliant enough to produce that extra sound during rapid filling. In practice, an S3 is often heard in patients with heart failure and reduced ejection fraction, especially when there’s volume overload. It’s typically best heard at the apex with the patient in the left lateral position using a bell at the low frequency. Atrial fibrillation is not defined by an S3 and would more commonly show an irregular rhythm; myocardial infarction can lead to systolic dysfunction and may eventually show an S3 if heart failure develops, but the S3 itself is most strongly associated with congestive heart failure. Aortic stenosis produces a systolic ejection murmur rather than a prominent S3.

An S3 heart sound reflects rapid, early filling of a dilated or volume-overloaded ventricle. It happens just after the second heart sound when the ventricle suddenly accepts a large volume, producing a low-frequency gallop. This pattern is most characteristic of systolic dysfunction with left ventricular failure, i.e., congestive heart failure, where the ventricle is enlarged and compliant enough to produce that extra sound during rapid filling.

In practice, an S3 is often heard in patients with heart failure and reduced ejection fraction, especially when there’s volume overload. It’s typically best heard at the apex with the patient in the left lateral position using a bell at the low frequency.

Atrial fibrillation is not defined by an S3 and would more commonly show an irregular rhythm; myocardial infarction can lead to systolic dysfunction and may eventually show an S3 if heart failure develops, but the S3 itself is most strongly associated with congestive heart failure. Aortic stenosis produces a systolic ejection murmur rather than a prominent S3.

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