Physiology – MCQ 5 – Which of the following is true about fourth heart sound ‘S4‘ :
Which of the following is true about fourth heart sound ‘S4‘ :
A. Can be heard by the unaided ear
B. Frequency is greater than 20 Hz
C. Heard during ventricular filling phase
D. Heard during ventricular ejection phase
Correct answer : Heard during ventricular filling phase