My very own real personal experience...was having chest pains after a good steak dinner or physical strain at age 57.
Took up walking 30 miles every week (5 rounds of 18 holes).
Now at age 79, I have zero issues with heart, no pains, no strokes, blood pressure under 125/80.
I have convinced myself, rigorous exercise beats anything a doctor can prescribe or perform any procedure, when it comes to heart problems.
Went into the hospital 4½ years ago at 64, with 5% heart function and a 193 bump heart rate. Left five days later wearing a defibrillator vest. Within a week I started walking 2+ miles per day against the advice of my heart failure specialist. As he said the vest doesn’t make you bullet proof. After 6 month my HR was steady at 70-80 bpm at rest, I was still walking daily and my heart function was back to over 50%. I fired the heart failure specialist. My regular cardiologist admitted he had never seen such a recovery. He said usually it takes a year or more to recover to that degree even if you do, and often something else goes wrong before the heart gets better. I now see him once every year and a half. Moral of the story you can sit around and wait to die or take matters into your own hands and let the chips fall where they may.