Question

Which of the following is correct?

A. Joint diastole- 70% of ventricular filling
B. Ventricular diastole- 25% ventricular filling
C. Isovolumetric contraction- 20% of ventricular filling
D. Isovolumetric relaxation- 30% of ventricular filling

• A. Both A and B
• B. A, B and C
• C. Only B
• D. A, B, C and D

Answer 1

The correct option is A Both A and B

Initially, the pressure gradient between the atria and the ventricles is high and ventricular filling is rapid (the phase of rapid early filling). Under joint diastole conditions, about 70% of ventricular filling occurs during this phase. As diastole progresses, ventricular pressure rises and the rate of filling slows (the phase of diastasis). The final 25% of filling during ventricular diastole results from atrial contraction (the phase of atrial systole). When the pressure in the ventricles rises above the pressure in the atria the mitral and tricuspid valves close and diastole is complete.

So, the correct answer is 'Both A and B'.