Atrial repolarization coincides in time with the a. P wave. b. T wave. c. QRS wave. d. P-Q interval. Soon after the onset of ventricular systole, the a. AV valves close. b. semilunar valves open. c....

Atrial repolarization coincides in time with the

a. P wave.

b. T wave.

c. QRS wave.

d. P-Q interval.

Soon after the onset of ventricular systole, the

a. AV valves close.

b. semilunar valves open.

c. first heart sound is heard.

d. aortic pressure increases