Hardening of the arteries, or atherosclerosis, is when the inner walls of an artery become narrow due to a buildup of cells, fat and cholesterol, called plaque.

Blood that tries to flow through the clogged artery can form a clot. If this clot cuts off the necessary blood flow to the heart muscle supplied by that artery, it begins to die. This causes a heart attack or myocardial infarction.

You should get help by calling your doctor or going to an urgent care facility if you experience any of these warning signs of a heart attack:

• An uncomfortable heavy feeling, pressure, pain or squeezing sensation in your chest that lasts more than just a few minutes.
• Pain or discomfort that foes into your shoulders, neck or arms.
• Discomfort as above associated along with shortness of breath, dizziness, sweating, nausea, fainting or lightheadedness