Related Experiment Video
Updated: May 19, 2026

06:04
Ultrasonographic Assessment During Cardiopulmonary Resuscitation
Published on: October 24, 2020
An argument for reviving the disappearing skill of cardiac auscultation
Donald Clark1, Mustafa I Ahmed, Louis J Dell'italia
1University of Alabama at Birmingham, Division of Cardiothoracic Surgery, Birmingham, AL 35294, USA.
Cleveland Clinic Journal of Medicine
|August 3, 2012
Abstract
No abstract available in PubMed .
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S1 (First Heart Sound)-
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Heart Sounds
Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
