Clemens, I had a major heart attack ten years ago and have 8 stents!! I made a quick recovery aided by the use of an ebike. I was given a maximum heart rate of 110 while recovering which I monitored by use of a fitbit watch when out cycling, If my heart rate got to 90, I upped the power of the ebike and all was well. Some 6 months after the heart attack my cardiologist remarked on what he said was a recovery well ahead of expectations and I told him about my ebike wich allowed me to exercise while knowing i wasn't overdoing it. He now recommends the use of an ebike to all his post heart attack patients!!! I wish you a speedy recovery. Regards from Ireland