CARDIOLOGY
MITRAL STENOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The right ventricle finishes contracting.
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The left atrium is finished contracting.
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The left ventricle finishes contracting.
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The right atrium is finished contracting.
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Detailed explanation-1: -Diastole begins with the closing of the aortic valve (or pulmonic) and ends with the closing of the mitral valve (or tricuspid). This period encompasses the ventricular relaxation and filling. Diastole represents when the blood vessels return blood to the heart in preparation for the next ventricular contraction.
Detailed explanation-2: -When the left ventricle relaxes, the aortic valve closes and the mitral valve opens. This lets blood flow from the left atrium into the left ventricle. The left atrium contracts. This lets even more blood to flow into the left ventricle.
Detailed explanation-3: -Isovolumetric relaxation (d-e): When the ventricular pressures drop below the diastolic aortic and pulmonary pressures (80 mmHg and 10 mmHg respectively), the aortic and pulmonary valves close producing the second heart sound (point d). This marks the beginning of diastole.
Detailed explanation-4: -Ventricular systole commences with the closure of the mitral and tricuspid valves once ventricular pressure exceeds atrial pressure. The closure of these valves causes the first heart sound.