12) ventricluar refractory period

[Editor]

12) THE ABSOLUTE REFRACTORY PERIOD IN VENTRICULAR MUSCLE

a) is the phase of the cardiac cycle when the heart cannot be stimulated by any stimulus however strong
b) is of similiar duration to the action potential
c) is longer than the refractory period in skeletal muscle
d) lasts approximately as long as the ventricular contraction
e) is always twice the S-T interval in the ECG

tftff

[sangram]

a. true
b. is a part of AP
c. as the AP in LV is longer than SKM
d. LV contraction is longer than AP
e. nothing is `always\'.