Effect of Mitral Valve Repair on Cardiopulmonary Exercise Testing Variables in Patients with Chronic Mitral Regurgitation

Dorival Julio Della Togna, Alexandre Antônio da Cunha Abizaid, Romeu Sérgio Meneghelo, David Costa de Souza Le Bihan, Auristela Isabel de Oliveira Ramos, Samira Kaissar Nasr, Felipe Souza Maia, Zilda Machado Meneghelo, Amanda Guerra de Moraes Sousa
2013 Arquivos Brasileiros de Cardiologia  
Mitral valve repair is the surgical procedure of choice for patients with chronic Mitral Regurgitation (MR). The good early and late results allow surgical indication before symptom onset. The cardiopulmonary exercise test (CPET) can objectively assess functional capacity, but little is known about the effect of surgery on their variables. Objectives: Evaluate the effects of mitral repair on CPET variables in patients with chronic MR. Methods: A total of 47 patients with severe MR were
more » ... re MR were selected; these patients underwent mitral valve repair and were submitted to CPET ± 30 days before surgery, as well as six to 12 months after the surgery. Results: There was predominance of functional class I or II NYHA in 30 (63.8%) and 34 patients (72.3%), respectively. A significant decrease in oxygen consumption (VO 2 ) was observed after surgery, from 1,719 ± 571 to 1609 ± 428 mL min-1, p = 0.036. There was a decrease in Oxygen Uptake Efficiency Slope (OUES) from 1,857 ± 594 to 1763 ± 514, p = 0.073 and oxygen pulse (O 2 ) increased after surgery, from 11.1 ± 3.2 to 11.9 ± 3, 2 mL.beat-1 (p = 0.003). Conclusion: The mitral valve repair did not increase peak VO 2 and OUES despite positive cardiac remodeling observed seven months after surgery. However, O 2 pulse increased postoperatively, suggesting improved LV systolic performance. The CPET is a useful tool to assist in the medical management of patients with MR. (Arq Bras Cardiol. 2013; [online]. ahead print, PP.0-0)
doi:10.5935/abc.20130053 fatcat:uhc3pa2pkvaxngahbehnaijtta