From the day they left the hospital, the one-year risk of at least one rehospitalization for any reason in Medicare beneficiaries who suffered a heart attack like Sanders’ was about 50 percent (the baseline annual risk among his age cohort is more like 1 in 6). Again, by virtue of four incident-free months on the trail, that number is now lower for Sanders. But his chance of another hospitalization between now and November alone likely remains between 30-35 percent. While the daily risk is low, around 0.17 percent, we have more than 250 days to go until Election Day. The risks add up.

If he gets the nom and then has a heart attack and trump wins and I become an alcoholic/drug addict…

From Slate

What Are the Chances Sanders Has Another Heart Attack Before November?