A new study shows that the most devastating complications from diabetes have dropped drastically over the past 20 years, with heart attacks and high blood sugar deaths falling by more than 60 percent. Strokes, kidney failure and amputations also declined. Researchers credited efforts to improve the lives of Type 2 patients in particular. The good news is doctors are better at controlling risk factors that can lead to complications. The bad news, however, is that the number of Americans with the disease more than tripled during the study’s period.