1. For a healthy human heart the entire cardiac cycle typically runs less than one second.

2. Cardiac Cycle a complete cardiac movement, or heart beat, including systole, diastole, and the intervening pause

3. The mode monitors a full cardiac cycle (A-A interval) for the presence of intrinsic ventricular activity.

4. Fortunately, auscultation of Crepitations in phase with the cardiac cycle (Hamman's sign) and subcutaneous swelling and crepitus are specific diagnostic signs

5. When a high frequency alternating current is passed through the thorax by means of tape-electrodes, the electrical impedance Z is changing synchronously with the cardiac cycle.