Understanding the ECG Waveform: P, QRS, and T Waves Explained #1403224 (License: Personal Use)

This schematic ECG waveform highlights key components: the P wave indicates atrial depolarization, the sharp QRS complex represents rapid ventricular depolarization, and the T wave reflects ventricular repolarization. The Q, R, and S segments together form the QRS complex, with R being the dominant upward deflection. Abnormalities in shape, duration, or amplitude can signal conditions like myocardial infarction, bundle branch blocks, or electrolyte imbalances.

Used in medical education, cardiology resources, and clinical reference guides to teach or explain normal cardiac electrophysiology; matches user intent for learning ECG interpretation basics or reviewing diagnostic criteria.