3-30-07 - -1Circulatory routes Y Systemic circulation Y...

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Unformatted text preview: -1Circulatory routes: Y Systemic circulation Y Pulmonary circulation Y Coronary circulation* Y Y Myocardial infarction (heart attack) myocardial necrosis. Thrombus formation in coronary artery Heart attack: Y Leading cause of mortality/morbidity (permanent decrease in function) in the US Y 500k-700k deaths per year in the US Y 1.3 million non-fatal reports Y 40-70 years: males predominantly Y Over 70 years: both sexes equal Surgery for preventing/treating MI: Y Coronary bypass Y Angioplasty Y stents Conduction system of the heart Y The heartbeat originates in and is conducted through the heart without extrinsic stimulation Y sinoatrial (SA) node: pacemaker Y Atrioventricular (AV) node Y Atrioventricular (AV) bundle: Bundle of His Y Bundle branches Y Purkinje fibers Y Y Ch. 19 Blood vessels 60k miles Structure permits: blood flow, & molecular exchange between blood and tissues ...
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