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Split S1 Heart Sound
Manage episode 313651256 series 3279691
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The M1 sound occurs slightly before T1. Because the mitral and tricuspid valves normally close almost simultaneously, only a single heart sound is usually heard. However, in about 40% to 70% of normal individuals. A split S1 sound is common in the setting of a right bundle branch block or ventricular tachycardia/premature ventricular contractions, or PVCs, with a right bundle branch block morphology.
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