1. The heart’s physiology
The cardiac cycle and coronary flow

2. Conduction System

3. Coronary flow

4. Summary The conduction system of the heart is composed
sino-atrial node ( SA node or pacemaker of the heart)
atrio-ventricular node (AV)
right and left bundle
The electrical conduction precedes the mechanical response of the heart muscle that lead to the relaxation (diastole) and contraction (systole) components of the cardiac cycle
Coronary blood flow occurs during diastole
The heart muscle (myocardium) extracts oxygen needed to function
Summary