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This document describes different types of splitting of the second heart sound (S2) including physiological splitting, fixed splitting, wide splitting, and paradoxical splitting. Physiological splitting is normally seen during inspiration as the pulmonary valve closes after the aortic valve. Fixed splitting is seen with atrial septal defects as S2 is split during both inspiration and expiration. Wide splitting is seen with right bundle branch block or mitral regurgitation and the split becomes wider during

Author
nora almutairi
Language
EN