Failed percutaneous mitral commisurotomy due to congenital anomaly of inferior vena cava.

: Since its inception in 1982, percutaneous transvenous mitral commissurotomy (PTMC) has gained increasingly wide use internationally in patients with Rheumatic Mitral stenosis. PTMC offers an alternative to surgery in patients who have pliable mitral valve.Very few reasons were reported to abort the procedure when patient lies on the table. This study presents two case reports in which congenital venous anomalies were one of the reasons to terminate the procedure.