People with diabetes (fasting blood glucose level of 126 mg/dL or greater) are two to four times more likely to have a heart attack than people without diabetes. According to the American Heart Association in June 2014, at least 10 percent of people who suffer a heart attack have undiagnosed diabetes.
Reasons why people with diabetes are at increased risk for a heart attack may be that they are more likely to have elevated triglyceride and low HDL cholesterol levels, high blood pressure, and obesity, and also that diabetes itself contributes to heart attacks.
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