Physiology Cardiovascular system 6059498e Normal QT interval is (in seconds) A 0.12 - 0.20 B 0.40 - 0.43 C 0.08 - 0.10 D None High-Yield Explanation QT interval 0.40 to 0.43Ref: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:494