Electrocardiogram (ECG) Basics

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Flashcards related to the key components of an Electrocardiogram (ECG) and their meanings.

Last updated 4:44 PM on 4/14/26
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5 Terms

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P Wave

Represents atrial depolarization; indicates activation of the atria squeezing blood into the ventricles.

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PR Interval

The flat stretch following the P wave; indicates the delay of the AV node allowing ventricles to fill.

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QRS Complex

Represents ventricular depolarization; indicates the ventricles firing and contracting to push blood out.

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ST Segment

The flat segment after the QRS complex; elevation may indicate a myocardial infarction.

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T Wave

Represents repolarization; indicates the resetting of the ventricles to prepare for the next cycle.