Cardiovascular System
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Transcript of Cardiovascular System
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Cardiovascular System
My Achin Heart
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I. Functions
• A. Circulate important materials– 1. oxygen– 2. wastes– 3. endocrine hormones– 4. glucose
• B. Help regulate body temperature
• C. Help control pH• D. Combat pathogens
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II. Terminology
• A. Artery• B. Vein• C. Atrium• D. Ventricle• E. Pulmonary circuit• F. Systemic circuit• G. Heart membranes
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III. Gross Anatomy of Heart
• A. SVC & IVC• B. Right atrium• C. Tricuspid valve• D. Right ventricle• E. Pulmonary artery• F. Pulmonary veins• G. Left atrium• H. Bicuspid valve• I. Left ventricle• J. Aortic arch
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Labeled diagram of the heart
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IV. Valves and one-way flow • A. Atrioventricular valves
– 1. chordae tendonae– 2. bicuspid– 3. tricuspid
• B. Semilunar valves– 1. Pulmonary semilunar– 2. aortic semilunar
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C. Valve problems
• 1. rheumatic fever-untreated strep infection-immune system attacts heart valve-becomes stiff and does not meet in the middle
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2. Prolapsed valve
• a. Normal valve• b. Mitral valve
normal culprit
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3. Valve stenosis
• a. Calcification• b. regurgitation
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VI. Coronary Circulation• A. Heart muscle
nutrition• B. Coronary
atreries• C. Coronary
veins
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D. Coronary artery disease• 1. Atherosclerosis
• 2. Stents
• 3. Bypass surgery
• 4. Infarct
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VII. Excitation-Contraction Coupling
• A. Intrinsic conduction system of the heart. – 1. SA Node– 2. AV Node– 3. Bundle of His– 4. Bundle branch– 5. Purkinje fibers
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B. Cardiac cycle• 1. systole• 2. diastole
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C. Heart Sounds
1. Door opening vs closing
2. Lub3. Dup4. Heart murmurs
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D. ECG Tracing
• 1. P wave
• 2. QRS complex
• 3. T wave
• 4. Abnormalities
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VIII. Cardiac output
• A. Cardiac output = stroke volume X heart rate
• B. Stroke volume– 1. 60%– 2. Starling’s law of the heart– 3. venous return
C. Heart Rate1. ANS control2. Hormonal control