Prognostic impact of peak oxygen uptake and percentage of predicted value of peak oxygen uptake in patients with left ventricular dysfunction.

Background: Comparing the prognostic value of peak oxygen uptake (VO2max) in absolute values and percentage of predicted VO2max (%PredVO2) in terms of prognostic stratification, contradictory references are found in the medical literature. In theory, the measurement of VO2max relative to a normal subject should improve its predictive capacity, because VO2max is influenced by gender, weight, physical activity and age.

Objectives: To compare the prognostic value of VO2max and %PredVO2 (Jones equation) in an adult population (> or = 20 years) of patients with left ventricular systolic dysfunction and to study the influence of age on these parameters.

Recovery kinetics of oxygen uptake after cardiopulmonary exercise test and prognosis in patients with left ventricular dysfunction.

Introduction: The prognostic value of peak oxygen uptake (peak VO2) in patients with left ventricular systolic dysfunction is currently recognized and accepted. Some studies have shown that other cardiopulmonary exercise test (CPET) parameters have additional value.

Objectives: To evaluate whether our population of patients with left ventricular dysfunction had similar results to those found by other investigators who showed that a slow normalization of oxygen uptake (VO2) during the recovery period of a CPET has prognostic value, and whether the recovery phase parameters have additional prognostic value to peak VO2 in these patients.