Have you changed to a heart healthy diet?
That name is not just a catchy slogan. I am lucky in having a healthy heart at almost 70 but a had an internal carotid endarterectomy 3 years ago for a 90% blockage.
A healthy diet, 4-6 hours /week of vigorous exercise and good regular sleep hours will extend both your duration and quality of life. The best investment I have ever made is a simple home gym. A good quality treadmill and elliptical, some kettlebells and free weights will suffice if you use it regularly.
I retired in April and am really enjoying feeling good enough to do everything I want, albeit somewhat slowly.
LISTEN TO YOUR DOCTOR, CARDIAC REHAB WORKS!!
Good luck and have a great hunt when you are ready.
mike r