Understanding ECG Signals: A Simple Guide

General
1

An Electrocardiogram (ECG) records the heartโ€™s electrical activity. Each wave and interval represents a specific event in the cardiac cycle.

P Wave - Atrial depolarization (atria contract)

PR Interval - Electrical impulse travels from the atria to the ventricles through the AV node

QRS Complex - Ventricular depolarization (ventricles contract and pump blood)

ST Segment - Early phase of ventricular recovery. Abnormalities may indicate myocardial ischemia or infarction

T Wave - Ventricular repolarization (ventricles relax and prepare for the next heartbeat)

Understanding these ECG components is a fundamental step for every healthcare professional and pharmacy student. ECG interpretation becomes more meaningful when combined with clinical history, symptoms, and physical examination.

Understanding ECG signals
Understanding ECG signals1024ร—1536 406 KB

2

This is a great and easy-to-understand breakdown of ECG basics. Understanding what each wave and interval represents makes ECG interpretation much less intimidating, especially for pharmacy and healthcare students. A strong foundation in these basics is definitely the first step toward understanding abnormal ECG patterns.