Cardiac cycle — Flashcards

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

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

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

What type of action potential occurs in the ventricles, atria, and Purkinje system?_____

What is the approximate normal pressure in the left ventricle (systolic and diastolic)? _____

The heart sound _____ may be audible during isovolumetric contraction

The y descent on jugular venous pulse corresponds to _____

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

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

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