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High blood pressure dangers: Hypertension's effects on your body

Damage to your heart

High blood pressure can cause many problems for your heart, including:

  • Coronary artery disease. Arteries narrowed and damaged by high blood pressure have trouble supplying blood to your heart. When blood can't flow freely to your heart, you can have chest pain (angina), irregular heart rhythms (arrhythmias) or a heart attack.
  • Enlarged left heart. High blood pressure forces your heart to work harder to pump blood to the rest of your body. This causes part of your heart (left ventricle) to thicken. A thickened left ventricle increases your risk of heart attack, heart failure and sudden cardiac death.
  • Heart failure. Over time, the strain on your heart caused by high blood pressure can cause the heart muscle to weaken and work less efficiently. Eventually, your overwhelmed heart begins to fail. Damage from heart attacks adds to this problem.