Characters of tricuspid regurgitation | AIIMS MCQs for PG Entrance

Which of the following statements best characterizes tricuspid regurgitation? 
A. Infective endocarditis is a common cause
B. The murmur heard in tricuspid regurgita¬tion decreases with inspiration
C. Large a waves in the jugular venous pulse are characteristic
D. Correction of coexistent left ventricular failure rarely improves the condition

Ans. A. Infective endocarditis is a common cause

Infective endocarditis is a common cause of tricuspid regurgitation. The murmur of tri­cuspid regurgitation typically increases with inspiration. Large v waves are seen in the jug­ular venous pulse. Because a common cause of right ventricular failure and secondary tri­cuspid regurgitation is left ventricular failure, correction of left ventricular failure, when present, often is useful in the treatment of tri­cuspid regurgitation. Diagnosis of tricuspid re­gurgitation usually is made on the basis of clinical or echocardiographic evidence. Car­diac catheterization rarely is used to make the diagnosis