system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
PR interval in ECG shows?
assistant
The correct answer is  Normal ECG waves and Intervals: ECG wave/Interval Characteristics 1. P Wave Reflects Atrial Depolarization (activation) 2. QRS complex Depolarization of ventricles 3. T Wave Repolarization of ventricles 4. PR Interval Atrial depolarization and conduction through AV node 5. QT Interval Total duration of Ventricular depolarization and repolarization 6. ST segment Plateau phase of ventricular action potential