PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Isovolumetric contraction occurs during the ____ of the electrocardiogram.
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T wave
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R wave
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P wave
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S-T segment
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P-Q segment
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Explanation:
Detailed explanation-1: -Isovolumetric relaxation follows (phase IV), and when left ventricular pressure falls below left atrial pressure, ventricular filling begins. Thus, end-diastole is at the lower right-hand corner of the loop, and end systole is at the upper left corner of the loop.
Detailed explanation-2: -The second phase of the cardiac cycle (isovolumetric contraction) begins with the appearance of the QRS complex of the ECG, which represents ventricular depolarization.
There is 1 question to complete.