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8 Cards in this Set

  • Front
  • Back

Myocardium

The heart muscle

Intercalated discs

The junction between adjacent cardiac muscle cells that forms a mechanical and electrical connection between cells

Syncytium

A group of cells of the myocardium that function collectively as a unit during depolarization

Electrocardiogram (ECG)

Tracing that provides a graphic illustration of the electrical current generated by excitation of the heart muscle

Diastole

The relaxation phase of the cardiac cycle

Systole

The contraction phase of the cardiac cycle

Cardiac cycle

One complete sequence of contraction and relaxation of the heart

Stroke volume

Amount of blood is directed from the ventricles with each beat of the heart. Important in supporting exercise