S3 and S4 heart sounds
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S3 and S4 heart sounds
S3 Heart Sound (Third Heart Sound) Mechanism: - Occurs during rapid filling phase of diastole ⇒ Sudden limitation of ventricular filling flow - Coincides with (y) descent of atrial pressure waveform - Happens after S2 Physiological (Normal) Heard in: Healthy young children; Young adults; Athletes with slow heart rates; High output states ...
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🫀 S3 vs S4 Heart Sounds — Know the Difference 🎧 Extra heart sound? Timing is everything. 🔵 S3 = Early diastole Rapid ventricular filling into a dilated, volume-overloaded ventricle. Often seen in systolic dysfunction (HFrEF). 🔴 S4 = Late diastole Atrial contraction forcing blood into a stiff, non-compliant ventricle. Associated with hypertension, LVH, and diastolic dysfunction. ⏱ Early = volume problem. ⏱ Late = compliance problem. If you can’t tell which is which, you don’t understand heart
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🫀 S3 vs S4 Heart Sounds — Know the Difference 🎧 Extra heart sound? Timing is everything. 🔵 S3 = Early diastole Rapid ventricular filling into a dilated, volume-overloaded ventricle. Often seen in systolic dysfunction (HFrEF). 🔴 S4 = Late diastole Atrial contraction forcing blood into a stiff, non-compliant ventricle. Associated with hypertension, LVH, and diastolic dysfunction. ⏱ Early = volume problem. ⏱ Late = compliance problem. If you can’t tell which is which, you don’t understand heart
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🫀 S3 vs S4 Heart Sounds — Know the Difference 🎧 Extra heart sound? Timing is everything. 🔵 S3 = Early diastole Rapid ventricular filling into a dilated, volume-overloaded ventricle. Often seen in systolic dysfunction (HFrEF). 🔴 S4 = Late diastole Atrial contraction forcing blood into a stiff, non-compliant ventricle. Associated with hypertension, LVH, and diastolic dysfunction. ⏱ Early = volume problem. ⏱ Late = compliance problem. If you can’t tell which is which, you don’t understand heart
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