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The second heart sound, or S 2, forms the "dub" of "lub-dub" and is composed of components A 2 (aortic valve closure) and P 2 (pulmonary valve closure). Normally A 2 precedes P 2 especially during inspiration where a split of S 2 can be heard.
It sometimes radiates to the carotid arteries. In mild aortic stenosis, the crescendo-decrescendo is early peaking. Whereas in severe aortic stenosis, the crescendo is late-peaking. In severe cases, obliteration of the S2 heart sound may occur. Stenosis of Bicuspid aortic valve is like the aortic valve stenosis heart murmur. But, one may hear a ...
The Bentall procedure is a type of surgical procedure when the aortic valve, aortic root, and ascending aorta are replaced in a single operation. There are two basic types of artificial heart valve: mechanical and tissue. Mechanical valves are made of metal and have evolved over time ("ball and cage", "bileaflet").
When ventricular systole ends, pressure in the left ventricle rapidly drops and the pressure in the aorta forces the aortic valve to close. The closure of the aortic valve contributes the A2 component of the second heart sound. The pulmonary valve (sometimes referred to as the pulmonic valve) lies between the right ventricle and the pulmonary ...
In a healthy heart, there are only two audible heart sounds, called S1 and S2. The first heart sound S1, is the sound created by the closing of the atrioventricular valves during ventricular contraction and is normally described as "lub". The second heart sound, S2, is the sound of the semilunar valves closing during ventricular diastole and is ...
Wiggers diagram with mechanical (echo), electrical (ECG), and aortic pressure (catheter) waveforms, together with an in-ear dynamic pressure waveform measured using a novel infrasonic hemodynography technology, for a patient with severe aortic stenosis.
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