MADISON (WKOW) -- With frigid cold hitting Wisconsin, the American Heart Association says it is important to know the cold can affect the heart.
The association says people with coronary heart disease often suffer chest pain or discomfort when they're in cold weather.
It also says some studies suggest harsh winter weather may increase a person's risk of heart attack due to overexertion.
The group says heart failure causes most deaths in hypothermia. Symptoms include lack of coordination, mental confusion, slowed reactions, shivering and sleepiness. If you experience any of these, you should call 911 immediately.
The American Heart Association sent out a list of reminders for the bitter cold:
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