Cardiac cycle — Flashcards

How do aortic and ventricular pressure change during reduced ventricular ejection?_____

Which phase in the SA node accounts for its pacemaker activity and automaticity?_____

Slowed conduction through the AV node normally causes a _____-msec delay, allowing time for ventricular filling

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

How does ventricular volume change during atrial systole?_____

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

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

The heart sound _____ may be audible during isovolumetric contraction

The calcium channels that open during the plateau phase (myocardial action potential) are _____-type channels

Conduction velocity is increased when the space (length) constant is _____