He want to know if a person is using nicotine parch to quit smoke, is taking a high rick and can suffer a heart attack?

Better than smoking. Nicotine patches used properly can be a safe and effective way to quit smoking. As far as we know, the most dangerous part of a cigarette when it comes to heart attack and cancer risk is the tar and smoke itself. While nicotine is a highly addictive substance and may have some effects on blood pressure and heart rate, nicotine in the form of a patch on the way to quitting is safe.