title: A study of lung function and oxygen uptake during exercises in cases undergoing mitral valve surgery.
abstract: In 1986-7, 80 cases with isolated mitral valve disease undergoing open heart surgery were studied, for spirometry, resting and exercise, oxygen uptake (VO2) preoperatively and 3 months postoperatively. Pulmonary artery pressures (PAP) were recorded prior to surgical correction and soon afterward. Pulmonary hypertension was mild (I) in 56.2%, moderate (II) in 25% and severe (III) in 18.8% cases. Though spirometric functions were lower with severe PH, these did not improve significantly 3 months later. But direct MBC improved significantly in grs. I and II, along with exercise VO2 and mean PAP. (DMBC:75.7 lit. to 91.8 lit: P less than 0.001; Exercise VO2 798 ml to 983 ml: P less than 0.001). Mean PAP 56.8 to 39.5 mm: P less than 0.001). Thus these functions may be used to objectively evaluate physiologic changes in cardiac surgical cases.
authors.forename: M P
authors.initials: MP
authors.lastname: Murthy
authors.forename: R U
authors.initials: RU
authors.lastname: Rupwate
authors.forename: G B
authors.initials: GB
authors.lastname: Parulkar
authors.forename: S R
authors.initials: SR
authors.lastname: Kamat
mesh_terms: D000328:Adult; D005260:Female; D006349:Heart Valve Diseases / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery; D010101:Oxygen Consumption / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D011446:Prospective Studies; D012129:Respiratory Function Tests