Loud S1 is caused by-: (A) Calcified mitral valve, (B) Mitral Regurgitation, (C) Sho PR interval, (D) Bradycardia
Answer is C. Loud S1: Tachycardia Sho PR Interval. Mitral stenosis Tricuspid stenosis Soft S1: Bradycardia Prolonged PR Interval Aoic regurgitation Pulmonary regurgitation. Ref : Harrison's 20th edition pg 1563