The contraction phase of the heart is called_________

The phase in the cardiac cycle in which the ventricles relax between contractions is calledSelect one:a.systole.b.diastole.c.fibrillation.d.vasodilator.

The part of the cardiac conduction system that excites contraction of the interventricular septum is the ________________.

A patch of nodal tissue responsible for initiating the rhythmic contractile activity of the heart is present in

28. During which phase of cardiac cycle is ventricular volumelowest?A. Isovolumetric ventricular contractionB. Isovolumetric ventricular relaxationC. Atrial systoleD. Rapid ventricular ejection

The AV node releases an electrical impulse to cause the contraction of which chambers of the heart?ventriclesatria