ECG Waves & Intervals Flashcards Preview

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Flashcards in ECG Waves & Intervals Deck (9)
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1

P Wave

the sequential activation (depolarization) of the right and left atria

2

QRS Complex

right and left ventricular depolarization (normally the ventricles are activated simultaneously)

3

ST-T wave

ventricular repolarization

4

U wave

origin for this wave is not clear - but probably represents "afterdepolarizations" in the ventricles

5

PR interval

time interval from onset of atrial depolarization (P wave) to onset of ventricular depolarization (QRS complex)

6

QRS duration

duration of ventricular muscle depolarization

7

QT duration

duration of ventricular depolarization and repolarization

8

PP interval

duration of atrial cycle (an indicator of atrial rate)

9

RR interval

duration of ventricular cardiac cycle (an indicator of ventricular rate)