Cardiovascular System — Flashcards

Phase 1 of the myocardial action potential is caused by inactivation of voltage-gated _____ channels and opening of voltage-gated K+ channels

The integrity of the _____ reflex can be tested with the Valsalva maneuver

In cardiac cells, the absolute refractory period begins with the _____ and ends after the plateau

Phase _____ of the SA node action potential is characterized by upstroke

Atrial _____ is preceded by the P wave on ECG, which marks depolarization of the atria

The pulmonary circulation is normally characterized as a _____ resistance, high compliance system (low or high)

A _____ inotropic agent causes the cardiac function curve to shift downwards

A hyperkinetic pulse is a rapidly rising pulse with high amplitude due to the rapid ejection of a _____ stroke volume against a decreased afterload

When a person moves from standing to supine position, the heart rate _____, due to activation of baroreceptor reflex

Phase 3 of the myocardial action potential is caused by massive efflux of _____ and closure of voltage-gated Ca2+ channels