cardiovascular disorders
Tricuspid Regurgitation
Etiology of Tricuspid Regurgitation
Tricuspid regurgitation may be Primary Secondary (most common) Primary tricuspid regurgitationis less common. It can be due to Blunt chest trauma Carcinoid Syndrome None Congenital defects (eg, cleft tricuspid valve, Atrioventricular Septal Defect ) Ebstein Anomaly (downward displacement of a congenitally malformed tricuspid cusp into the right ventricle [RV]) Idiopathic myxomatous degeneration Marfan Syndrome None Medications (eg,ergotamine,fenfluramine,phentermine) Rheumatic Fever None Valvular abnormalities caused by Infective Endocarditis None Iatrogenic causes include pacemaker leads that cross the tricuspid valve and valve damage sustained during RV endomyocardial biopsy. is due to leaflet tethering, which is the result of reduced leaflet coaptation caused by annular dilation (typical of right atrial dilation caused by chronic Atrial Fibrillation ) and/or papillary muscle displacement (most commonly as a result of left heart disease causing Long-standing severe TR may lead to Classification and 