Cardiovascular System · NEET PG Preparation Physiology
A 55-year-old male with long-standing hypertension undergoes an echocardiogram, which reveals left ventricular hypertrophy and impaired early diastol…
Practice question from Cardiovascular System (NEET PG Preparation Physiology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-199FAB
A 55-year-old male with long-standing hypertension undergoes an echocardiogram, which reveals left ventricular hypertrophy and impaired early diastolic filling. During which phase of the cardiac cycle does the majority of normal ventricular filling occur?
- A.Atrial systole
- B.Rapid ventricular filling phaseCorrect answer
- C.Reduced ventricular filling phase (diastasis)
- D.Isovolumetric relaxation
Solution
In a normal heart, approximately 70-80% of ventricular filling occurs passively during the rapid ventricular filling phase early in diastole, driven by the pressure gradient between the atrium and the ventricle. Atrial systole contributes only about 10-30% at rest (the 'atrial kick').
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