George Washington III, like many, had an incredibly difficult 2020. He lost his father to Covid-19 and then battled the virus himself for three brutal weeks. Last fall, Washington’s eyes were on the future, as a newlywed looking forward to sharing his life with his new wife, Janan Jones. Then one morning last September, he experienced severe chest pain and began to sweat. Even though this regular runner doesn’t fit the stereotype of someone likely to have cardiac problems, he knew: This was a…