[The significance of the performance-lactate quotient in patients following acute myocardial infarct in a preliminary stress test].

According to the risk group classification on the basis of an isoenzyme monitoring n = 67 patients (of them 12 females) with acute myocardial infarction were temporarily differentiated: slight risk (n = 26) on the 14th day, medium risk (n = 16) on the 21st day and high risk (n = 25) greater than or equal to 28. By means of orientating tolerance test and measurement of the lactate concentrations examinations were performed on the day post infarction. All patients with slight risk achieved the physical performance of 375 Watt/min in slight lactate concentrations (less than 4 mmol/l). The performance/lactate quotient (WL-Q) for a slight risk was 1.23 for males and 0.98 for females, for a high risk only 0.66 (males) and 0.53 (females) for a high risk. Patients with high risk were reliably recognized and underwent an individually adapted physical conditioning, taking into consideration the sex-specific differences.