Assessment of patients with clinical congestive heart failure: Ventilatory threshold or aerobic power determination?

摘要: We have investigated the relative merits of ventilatory threshold (Vt) and maximal oxygen intake (VO2max) in functional assessment 12 patients with heart failure (New York Association class II III ejection fraction [EF] less than 35%). Subjects performed two cycle ergometer (CE) treadmill (TM) tests at 4‐day intervals, according to a Latin square design. The Vt was evaluated by observers. On an analysis variance, showed no significant observer bias difference reliability between In most instances, observers defined within 1 ml·kg−1·min−1 each other (95% confidence interval [CI] 0.23 2.04 ml·kg−1·min−1). When compared VO2max, measurements were more reliable had greater validity available quantitative external criterion, resting EF. Neither nor VO2max differed systematically CE TM tests. preferred TM, collection expired gas easier on seated patients. ...