Cardiac cycle — Flashcards

The rate of phase _____ in the SA node action potential cycle determines heart rate

During the plateau of a myocardial action potential, Ca2+ enters the cell through _____ receptors (L-type Ca2+ channels)

The "blip" in the arterial pressure curve, called the _____, is produced when the aortic valve closes

The heart sound _____ may be audible during isovolumetric relaxation

Cardiac contractility correlates directly with intracellular _____ concentration

A murmur due to patent ductus arteriosus is loudest at which heart sound? _____

Conduction velocity through the AV node is _____ than in the other cardiac tissues

How does the rate of upstroke in a SA node action potential compare to that of a myocardial action potential? _____

M2 muscarinic receptors are found in the _____, SA node, and AV node of the heart

The equation _____ may be used to calculate ejection fraction