Knowing what the main heart attack risk factors are can help to inspire you to take the necessary steps to minimize the chances of having one. Some risk factors can’t be controlled, such as heredity and simply getting older. Your chances of a heart attack are also greater if you have diabetes. However, you can and should focus on those factors that you can control, especially the major ones. Smoking significantly increases your chances of a heart attack, and of course is bad for your health in other ways. High cholesterol increases the possibility of a heart attack, as does high blood pressure which can also lead to stroke and kidney failure. A heart attack is also more likely if you are obese and lead a sedentary lifestyle. Too much stress is a risk factor, as is routinely drinking too much alcohol.