Petra is in the doctor's office for a medical exam. First the nurses check her BP and listen to her heartbeat with a steth. Than they prepare her for a bicycle stress test. The nurses place the ECG electrodes onto her chest and then help her onto the bicycle. Petra starts cycling and the med team checks her vital functions. Following some minutes of faster cycling she starts sweating. She is breathing faster, when nurse Edina stops her and checks her BP and listens to her heart with a steth. Petra then continues her cycling. A few minutes later she is totally exhausted, breathing deeply and... Show more