Anatomy
connective tissue that encircles each valve
What is the skeleton of the heart?
the heart's ability to initiate its own electrical impulse
What are the coronary arteries?
heart rate and stroke volume
What factors determine cardiac output?
pericardium
What is the double-walled sac that surrounds the heart?
the time it takes for an electrical impulse to travel from the SA node to the AV node
What is the PR interval?
RA -> RV -> LUNGS -> LA -> LV
What is the sequence of blood flow through the heart?
the force with which ventricular ejection occurs
What is contractility?
the heart's muscle layer, which performs the work of the heart
What is the myocardium?
the cardiac electrical impulse slows down here in order to let the atria fill up the ventricles
What is the AV node?
afterload
What are the forces the heart must work against to eject blood?
the amount of blood ejected by the heart with each beat
What is stroke volume?
epicardium
What is the thin layer of epithelial cells that covers the surface of the heart?
the average ejection fraction (EF) for a healthy heart
What is 70%?