Cardiopulmonary exercise test
Exercise induced cardiac ischemia was assessed using a
modified conventional maximum symptom-limited 1-min
incremental cardiopulmonary exercise test on a cycle ergometer
(Siemens-Elema, Germany). Cycling frequency
had to be at least 60 rounds pr minute. The criterion for
classifying a test as positive was the traditional ≥1 mm STsegment
depression observed in two adjacent leads.