Cardiac Waveforms and Intervals

Flashcards covering key concepts related to cardiac waveforms, intervals, and their meanings.

Atrial depolarization

The electrical activation of the atria, leading to contraction.

PR segment

The period between atrial depolarization and ventricular depolarization, representing the AV nodal delay.

QRS complex

The portion of an ECG that represents ventricular depolarization.

ST Segment

The period that indicates when the ventricles contract and empty.

T wave

The wave on the ECG that represents ventricular repolarization.

TP interval

The time interval during which the ventricles are relaxing and filling with blood.

Normal duration of QRS complex

Typically lasts around 0.08 seconds (or 80 milliseconds).

Small square on ECG paper

Represents 0.04 seconds (or 40 milliseconds).