The Impact of Bariatric Surgery on Cardiopulmonary Function: Analyzing VO 2 Recovery Kinetics

• Published in: Obesity surgery 2018-12, Vol.28 (12), p.4039
• Main Authors: Remígio, Maria Inês, Santa Cruz, Fernando, Ferraz, Álvaro, Remígio, Maria Cecília, Parente, Giordano, Nascimento, Igor, Brandão, Daniella, Dornelas de Andrade, Armele de Fatima, de Moraes Neto, Fernando, Campos, Josemberg
• Format: Article
• Language: English
• ISSN: 1708-0428

To assess cardiopulmonary capacity, autonomic heart function, and oxygen recovery kinetics during exercise testing before and after bariatric surgery. This is a prospective cohort study. Symptom-limited cardiopulmonary exercise testing was performed with 24 patients, 1 week before and 4 months after bariatric surgery. The main variables were maximum oxygen uptake (VO max), the time elapsed until the appearance of the first ventilatory threshold (TLV1), and VO oxygen kinetics during recovery with a 50% reduction in peak oxygen uptake in the recovery period after exercise (50%VO RP). The study demonstrated that the peak VO \kg increased significantly after bariatric surgery. When analyzed without adjusting for weight, the peak VO paradoxically and significantly decreased after the surgical procedure (p = 0.007). The exercise time until the anaerobic threshold was longer after surgical procedure than before it (p = 0.001). Regarding post-exercise oxygen recovery kinetics, there was a faster reduction in the peak oxygen uptake after bariatric surgery than before the procedure (p