Cardiac Waveforms and Intervals

These flashcards cover key vocabulary related to cardiac waveforms, their components, and definitions relevant to the understanding of ECG readings.

P Wave

Represents atrial depolarization.

QRS Complex

Represents ventricular depolarization.

T Wave

Represents ventricular repolarization.

PR Interval

The period from the beginning of atrial depolarization to the beginning of ventricular depolarization.

ST Segment

An isoelectric line that indicates the period between ventricular depolarization and repolarization.

Deflection

Any movement away from the baseline in a tracing.

Positive Deflection

Upward movement on the tracing.

Negative Deflection

Downward movement on the tracing.

Interval

A period of time between two points or events.

Segment

An isoelectric line, such as the PR Segment and ST segment.

Atrial Depolarization

The process of electrical activation in the atria.

Ventricular Depolarization

The process of electrical activation in the ventricles.

Ventricular Repolarization

The process by which the ventricles reset their electrical state.