QRS complex is due to: September 2008: (A) Ventricular repolarization, (B) Atrial depolarization, (C) Conduction through AV node, (D) Ventricular depolarization
Answer is D. Ans. D: Ventricular depolarizationQRS complex is due to ventricular depolarization and atrial repolarization. Normal duration is 0.08 sec.