Repolarization — ECG/EKG Terminology

Definition: The electrical recovery or "reset" of heart cells after contraction, allowing them to relax and refill with blood.

Key Facts

• Happens more slowly than depolarization
• Allows the heart muscle to relax and refill with blood
• Must complete before the next heartbeat can occur
• Abnormal repolarization can indicate heart problems

ECG Connection: Ventricular repolarization creates the ST segment and T wave on the ECG—important for detecting heart problems.

Why It Matters: T wave changes can indicate ischemia or dangerous electrolyte imbalances.