Not a medical person here, but suggest you do not let off on the gas and sleuth a little more as to why this happened and not just take sedentary behavior as the cause. If insurance supports, see if you have a hole in your heart via a bubble study, not that you will make any changes at your age, but you may better understand your health and perhaps have a Plan B should you have a repeat issue or something on the other side of your circulatory system like amorous fugax. Wishing you a long life and happy holidays.