Cardiac cycle — Flashcards

Activation of β1 receptors in the SA node produces an increase in _____ channel activity, which increases the rate of phase 4 depolarization and thus heart rate

Phase 0 of the SA node action potential is caused by opening of voltage-gated _____ channels

Patients with severe aortic stenosis depend upon _____ for maintenance of preload

The width of a pressure-volume loop is the _____

Activation of M2 receptors in the SA node produces a decrease in _____ channel activity, which decreases the rate of phase 4 depolarization and thus heart rate

Action potentials spread from the SA node to the _____ node and right/left _____, simultaneously

What three cell types are considered latent pacemakers? _____

Increased right atrial pressure, due to filling against a closed tricuspid valve, appears as the _____ wave on the venous pulse curve

_____ pressure is the highest arterial pressure during the cardiac cycle

Physiologic gynecomastia may occur in _____, _____, and _____ males