If a person is completely healthy and drinks even more than 3 cups of coffee a day, the probability of a heart attack is very low. This is different when a person has heart disease. In this case, any dose of coffee can have a very negative impact on health. For this reason, people with heart disease should not drink coffee. Most likely, one cup of loose coffee will not provoke a heart attack but strong coffee, several times a day, may lead to serious consequences. Scientists have proven that moderate consumption of coffee does not contribute to the development of the cardiovascular disease, so coffee can be safely consumed if you are healthy.