I know there have been threads on this subject before. I'm starting another one because the responses to the previous ones have ranged from skeptical (As in how do you know really? Or helpfully, maybe you're doing something wrong) to the snide (As in aw g'won you can die from a safe falling on your head). During the previous year or so I've noticed that the ordinary physical challenges of playing the trumpet have increased. This was particularly obvious holding a long note during rehearsal, or playing any note above the G sitting on top of the staff. Then it was the G, then the F, then the E. At home if I did the right thing and used a metronome, I'd be gassed after 8 bars. One of my bandmates brought me some remedial exercises and I was just starting them. That's when my knee surgeon sent me to a cardiologist for clearance for replacement surgery. That was July, and that clearance is nowhere in sight. Diagnosis -dilated cardiomyopathy compounded by premature ventricular contractions. Among the tests was a "Holter" monitor, where they attach electrodes to your chest and you wear a little box for 24 hours. That was twice. I did a half hour of trumpet for both of those, and both times the PVCs went off the graph. The second time I also tried a clarinet, and that seemed to be OK, no worse than light - very light - dumbbell exercise. So I'm looking for a piano teacher because if I will not let music drift out of my life. Again, I'm writing this because I feel previous writers weren't taken seriously. I don't know if I will, but I'm willing to take the risk if I can encourage one more player to see a doc if just when playing should be improving, it gets worse. Be well.