Interpreting an ECG involves analyzing the waveforms and intervals on the ECG tracing. Key components include: - P Wave: Represents atrial depolarization - QRS Complex: Indicates ventricular depolarization - T Wave: Reflects ventricular repolarization - PR Interval: Time between the onset of atrial depolarization and the onset of ventricular depolarization - QT Interval: Duration of ventricular depolarization and repolarization