Irvine has planted its flag as a national leader in all facets of health care, and that’s a good thing for you. The best medical minds are in Irvine, from researchers to doctors to makers of heart valves. Here, they can collaborate and accelerate the advancement of medicine and patient care. For these reasons, along with abundant parks and green space, Irvine was ranked in the top 10 in the U.S. for healthy communities, according to a report released after a survey of 170 cities by WalletHub, the personal finance website.