@fireguy8891 That's disappointing news on the Mri but honestly I, never had an mri in the beginning, the other thing that @thankful mentioned was a stress test that is usually a real good test for Heart Function. But I did not have that either. For me, it was the Cardio Rehab that gave me the confidence I needed. But also I had a pacemaker at the time and MRI's can't be done without lots of planning and usually don't see much. The magnetic waves scatter due to the metal of the pacemaker. But just like thankful said keep working on the cardio and listen to your body the folks at rehab are really knowledgeable at pushing you to your ability and I think that will tell you a lot also.