Immediate maternal and fetal outcome following percutaneous mitral valve balloon commissurotomy: a 6-year single-center experience from sub-Saharan Africa

Background: Mitral stenosis is the most common valvular heart disease during pregnancy. When severe, it leads to significant maternal and fetal morbidity and mortality. Percutaneous mitral valve balloon commissurotomy can be performed during pregnancy, and the present study aimed to describe the immediate maternal and fetal outcomes after percutaneous mitral valve balloon commissurotomy was done in a cohort of 23 pregnant patients with severe mitral stenosis in Addis Ababa, Ethiopia. Methods: Included in the current study were all pregnant mothers who had severe rheumatic mitral valve stenosis and who underwent percutaneous mitral valve balloon commissurotomy at the Cardiac Center of Ethiopia over 6-year period. Data were collected through chart abstraction using a structured proforma and then analysed using STATA version 13.0. Result: Median gestational age was 22 weeks and percutaneous mitral valve balloon commissurotomy was successful resulting in a significant increase in the mean mitral valve area of the group from 0.78 +/- 0.20 cm(2) to 1.89 +/- 0.31 cm(2) (p < 0.001). The mean mitral valve inflow gradient of the group was 23.95 +/- 6.27 mmHg and 6.80 +/- 2.44 mmHg, respectively, before and after the percutaneous mitral valve balloon commissurotomy procedure (p < 0.001). Post-procedure, there was no significant increment in mitral valve incompetence. The mean pulmonary artery pressure of the group decreased from 77.68 +/- 23.19 mmHg to 42.31 +/- 9.95 mmHg (p < 0.001). There was no fetal or maternal death following the procedure. Pregnancy ended at term gestation for 19/23 (82.6%) of the mothers and the mean birth weight of the neonates was 2800 g. Conclusion: Percutaneous mitral valve balloon commissurotomy procedure can safely be done for severe symptomatic rheumatic mitral stenosis in pregnancy in our setting.