The S3 heart sound occurs as the mitral valve opens and allows blood to fill the left ventricle passively. The sound happens as a result of blood striking the left ventricle during early diastole. An ...
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What are heart sounds and how to know if they’re normal
Medically reviewed by Jeffrey S. Lander, MD Key Takeaways S1 and S2 are the normal heart sounds you hear when the heart ...
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What to Know About the Third (S3) Heart Sound
A third heart sound, or S3, is a low-frequency, extra heart sound that may be heard with a stethoscope right after the normal S1 and S2 heart sounds. S1 and S2 are the "lub-dub" sounds of a heartbeat ...
An S4 heart sound cannot be present during atrial fibrillation (atrial kick is required). An S3 heart sound cannot be present in the setting of severe mitral stenosis. An S3 heart sound can be present ...
Auscultation Over the Tricuspid Area (the Left Lower Sternal Border) When you have completed your examination of the apex, move to the left lower sternal border. Tricuspid murmurs and some asymmetric ...
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