ECG interpretation involves systematically analyzing the waveforms and intervals to assess heart rhythm, rate, and overall electrical activity. This includes evaluating the P-wave (atrial depolarization), PR interval, QRS complex (ventricular depolarization), ST segment, T-wave (ventricular repolarization), and QT interval. A normal ECG typically shows a regular heart rate (60-100 bpm), normal P-waves, a PR interval between 120-200 ms, a QRS complex duration less than 120 ms, and a normal QT int

Dr. Abhishek Shukla today discussed the 10 key ECG changes seen in hyperkalemia, a potentially life-threatening electrolyte disturbance that demands urgent recognition and management. He explained that the earliest sign is often peaked T waves, which appear tall, narrow, and symmetrical due to faster repolarization of the ventricles. As potassium levels rise further, P waves begin to widen or flatten, reflecting impaired atrial conduction, and the PR interval prolongs as atrioventricular conduct

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