Properties of Cardiac Cells

Automatically: ability of the heart to initiate impulses regularly and spontaneously.

Excitability: ability of cardiac cells to respond to a stimulus by initiating a cardiac impulse.

Conductivity: ability of cardiac cells to respond to a cardiac impulse by transmitting the impulse along cell membrane.

Contractility: ability of cardiac cells to respond to an impulse by contracting. (Contractile cells comprise the largest mass of the myocardium).