Electrocardiogram

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8 Terms

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  1. P Wave

SA node fires and the impulse travels through the atria. This triggers atrial depolarization (contraction).

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  1. P-Q (P-R) Interval

Atrial depolarization is complete. The impulse is delayed at the AV node.

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  1. QRS Complex

Ventricular depolarization (contraction) begins at the apex. Atrial depolarization occurs.

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  1. S-T Segment

Ventricular depolarization (contraction) is complete.

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  1. T Wave

Ventricular repolarization (relaxation) begins at the apex.

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  1. Ventricular repolarization (relaxation) . . .

is complete

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Depolarization

Contraction

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Repolarization

Relaxation