Cardiovascular Diseases Eric Huang Engineering World Health.

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Presentation transcript:

Cardiovascular Diseases Eric Huang Engineering World Health

Overview of CVD Leading cause of death worldwide. More than a third of deaths from CVD. $400 billion in annual medical costs. 1 in 3 Americans have some form of CVD.

Prevalence by Age Roger VL, Go AS, Lloyd-Jones DM, et al. Heart disease and stroke statistics—2011 update: a report from the American Heart Association. Circulation. 2011;123:

Prevalence by Ethnic Group Mensah GA, Brown DW. An overview of cardiovascular disease burden in the United States. HealthAffairs. 2007;26(1):38-48.

CVD Breakdown Roger VL, Go AS, Lloyd-Jones DM, et al. Heart disease and stroke statistics—2011 update: a report from the American Heart Association. Circulation. 2011;123:

Heart Four chambers, two atria and two ventricles. Deoxygenated blood enters right atrium, oxygenated blood leaves left ventricle. Heart valves ensure unidirectional blood flow.

Blood Vessels Arteries carry blood away from the heart. Veins carry blood towards the heart. Capillaries allow exchange of substances between blood and tissue cells.

Arrhythmia Irregular heartbeats due to abnormal electrical impulses.

Atherosclerosis Artery narrowing reduces blood flow. Plaque can break off and result in an embolism. Associated with high LDL cholesterol levels.

Coronary Artery Disease Most common type of heart disease. Atherosclerosis of the heart deprives heart muscle of oxygen. Precursor to angina and heart attacks.

Congestive Heart Failure Heart unable to pump blood efficiently. –Insufficient cardiac output. Causes fluid buildup in other parts of the body.

Hypertension Blood pressure consistently above 140/90 mmHg. Weakens blood vessels and accelerates atherosclerosis. Contributes to aneurysm formation.

Stroke Interrupted blood flow to the brain. Ischemic strokes arise from embolisms or thrombi blocking blood vessels. Hemorrhagic strokes result from rupturing of blood vessels.

Angioplasty Widens blocked artery to restore blood flow.

Heart Bypass Surgery Reroutes blood flow around blocked blood vessel using vascular grafts.

Pacemakers Normalizes heart rhythm by delivering electrical impulses to the heart.