a) Why would exercise influence the R-R interval? Would a change
in R-R interval following a short period of exercise be the same
for all people, why/why not?
b) Each component of the ECG waveform is associated with a
particular activity during the cardiac cycle. Based on your
knowledge of the actions of the heart associated with the P, Q, R,
S, and T waves in the ECG, and what actions in the heart generate
the lub-dub sounds, when would...