The Impact of Bariatric Surgery on Cardiopulmonary Function: Analyzing VO2 Recovery Kinetics

• Published in: Obesity surgery 2018-12, Vol.28 (12), p.4039-4044
• 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
• Subjects: Anaerobic threshold; Fish oils; Gastrointestinal surgery; Maximum oxygen consumption; Medicine; Medicine & Public Health; Original Contributions; Surgery
• ISSN: 0960-8923; 1708-0428
• DOI: 10.1007/s11695-018-3469-4

Purpose To assess cardiopulmonary capacity, autonomic heart function, and oxygen recovery kinetics during exercise testing before and after bariatric surgery. Methods 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 2 max), the time elapsed until the appearance of the first ventilatory threshold (TLV1), and VO 2 oxygen kinetics during recovery with a 50% reduction in peak oxygen uptake in the recovery period after exercise (50%VO 2 RP). Results The study demonstrated that the peak VO 2 \kg increased significantly after bariatric surgery. When analyzed without adjusting for weight, the peak VO 2 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