NHTC 9 Cardiology - Notes
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| cardiology | the study of the heart & heart diseases
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| cardiologist | physician specializing in Dx & Tx of heart diseases
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| cardiovascular (CV) system | aka circulatory system, comprised of the heart & blood vessels
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| primary function of CV | delivers oxygen, nutrients and other essential substances to cells of the body; removes waste products of cellular metabolism
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| heart | muscular organ that pumps blood throughout the body
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| 4 chambers of heart | RA (right atrium), RV (right ventricle), LA (left atrium), LV (left ventricle)
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| arteries | carry oxygenated blood away from the heart to the body through the aorta
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| arteries | branch into smaller vessels called arterioles
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| veins | return deoxygenated blood from the capillaries to heart through IVC (inferior ven cava) & SVC (superior vena cava)
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| veins | branch into smaller vessels called venules
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| aorta | largest artery
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| capillaries | contain venous & anterial blood
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| capillaries | where the exchange of oxygen and carbon dioxide takes place
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| blood pressure | force exerted by blood on the arterial walls
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| systole | when the heart contracts and forces blood out of the heart
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| distole | when the heart relaxes allowing blood to refill the heart
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