Cardiac cycle — Flashcards

Activation of 1 receptors in the SA node produces an increase in _____ channel activity, which increases the rate of phase 4 depolarization and thus heart rate

Increased RV ejection time during inspiration causes delayed closure of the _____ valve (normal splitting)

How does ventricular volume change during atrial systole?_____

The normal heart sound _____ is loudest at the left upper sternal border

The increase in atrial pressure caused by atrial systole appears on the venous pulse curve as the _____ wave

What phase of the cardiac cycle begins during the QRS complex on ECG?_____

Phase 4 of the SA node action potential is caused by a slow, mixed Na+/K+ inward current via _____ channels

How does ventricular pressure change during isovolumetric relaxation?_____

The heart sound _____ may be audible during isovolumetric relaxation

Blood flows continuously through the cardiac cycle in all organs except the _____