Hemopericardium Following Transseptal Puncture During Balloon Mitral Valvotomy: Management Strategies and Outcomes.

Background. Hemopericardium is a major complication of balloon mitral valvotomy (BMV). Only a few studies are available to address this issue following transseptal access. In addition, the management strategy regarding completion of BMV is uncertain. Objective. We sought to determine the incidence of hemopericardium complicating transseptal puncture during BMV. In addition, the management strategy adopted and outcomes are highlighted. Methods. This prospective study included 29 consecutive patients who developed hemopericardium following transseptal access during BMV. Results. Out of 1424 patients who underwent BMV, hemopericardium developed in 29 patients following transseptal access (2.0%). The mean age of the study cohort was 36.9 +/- 13.7 years and 82.8% were women. A second transseptal puncture was done and BMV was completed in 26 patients (89.6%). An acceptable hemodynamic result was obtained in 22 patients (84.6%). Six patients 20.7%) underwent emergency surgery for hemopericardium. The sites of perforation were inferior vena cava-right atrial junction in 4 cases, left atrial posterior wall in 1 case, and left atrial appendage in 1 case. In addition to repair of the perforation, a total of 2 patients underwent mitral valve replacement and 1 patient underwent open mitral commissurotomy. The in-hospital mortality rate was 6.9%. Conclusions. The incidence of hemopericardium complicating transseptal access during BMV was 2.0%, and was associated with a mortality rate of 6.9%. BMV can be safely performed in the same sitting with a second transseptal puncture, in patients with a favorable valve morphology. Surgical intervention can be reserved for a subset of patients with persistent pericardial collection.