Heart disease is the leading cause of death in the United States. On average, 614,000 die each year from heart related conditions. It's one of the most preventable causes of death.

Most of this sharp rise in heart disease deaths is a result of our habits. We tend to eat unhealthy foods, smoke cigarettes, and just don't get enough activity.

That spells disaster for your humble, hardworking heart. The true key to avoiding a heart attack is to eat right, exercise, don't smoke, and limit alcohol intake.

If a heart attack is on the horizon, it can come out of nowhere. But sometimes there are a set of warning signs that your body sends you before you have a heart attack.

Heed these warnings. Visit a doctor and commit to a healthier lifestyle.

1. Weakness.

Before a heart attack, you may notice physical weakness as one of the first signs of an impending heart attack. This is a result of your heart having to work harder to circulate blood.

The constricting of your arteries, also associated with heart disease, means less blood is flowing to the muscles, causing them to weaken and atrophy.

2. Cold sweats and disorientation.

With a sick heart, your blood doesn't pump nearly as effectively, which causes changes in the amount of oxygen and nutrients that reach your brain.

This deficit of blood can result in cold sweats and dizziness. You may feel clammy and unwell. Your mind may also be somewhat "foggy."