Lecture
19: Cardiac Physiology - Cardiac Cycle Sherwood: Chapter 9
Objective: The action potential of contractile cardiac muscle cells shows a
characteristic plateau.
1. Atrial
excitation and contraction
a. interatrial
pathway
b. internodal pathway
2. Ventricular excitation
a. AV nodal delay
3. Electrocardiogram (ECG)
a. P wave, QRS
complex, T wave
4. Mechanical events of the cardiac cycle
a. systole
b. diastole
c. end-diastolic
volume
d. end-systolic
volume
e. stroke volume
5. Cardiac output and its control
a. heart rate
b. cardiac output
c. Frank-Starling
curve |