Will you have a heart attack or a stroke in your lifetime? Your odds may be worse than you think. Men and women may have a false sense of security about their chances of having a heart attack or stroke based on the current practice of calculating a patient’s risk 10 years into the future. New Northwestern Medicine research shows a young or middle-aged adult who is at low risk in the short term may be at very high risk in the long term -- if he or she has just one or two risk factors such as higher than optimal cholesterol or blood pressure levels.