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What is the downside to using hubs?
AV Period
The atrioventricular (AV) period refers to the phase of the cardiac cycle when the atria are contracting and pushing blood into the ventricles.
Ectopic Focus
Any pacemaker other than the sinus node of the heart; abnormal pacemaker; an ectopic pacemaker.
Ventricular Systole
Contraction of the ventricles.
Diastole
The phase of the heart's cycle during which the heart muscles relax and the chambers fill with blood.
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