When stress levels go up, heart attacks go up, too -- and it is hard to find a time that is more stressful than the holidays. Holiday-related stress makes Thanksgiving through New Year's the most popular time of year for heart attacks.
During the holidays, people engage in more unhealthy behaviors. They tend to eat more high-fat foods, eat more in general, drink more liquor and smoke more cigarettes.
An estimated 50 percent of the heart attacks that happen in the United States occur during the winter months.