121 week 8 circulatory system
TRANSCRIPT
Objectives
• Identify anatomy and physiology of the cardiovascular system
• Recognize common symptoms of the cardiovascular system
• Recognize common laboratory and diagnostic tests for diseases of the cardiovascular system
• Differentiate various diseases of the cardiovascular systemMyocardial InfarctionCongestive Heart FailureThrombophlebitisReye’s SyndromeRheumatic Fever
Identify anatomy and physiology of the cardiovascular system
Recognize common symptoms of the cardiovascular system• Fatigue• Dyspnea• Fever• Weakness• Tachycardia and
palpitations• Pallor• Chest pain (angina)
• Unusual sweating, especially at night
• Edema• Nausea, vomiting or
anorexia• Anxiety• Headache• Clubbing
Common laboratory and diagnostic tests • Blood tests (serum
enzymes, ESR)• Angiography/
arteriography• Electrocardiography• Chest x-ray• Cardiac
catheterization• Blood pressure• Echocardiography
Cardiac catheterization
Echocardiography Angiography
Atherosclerosis
controllable risk factors for atherosclerosis:
• High blood cholesterol (especially LDL or "bad" cholesterol over 100 mg/dL)
• Cigarette smoking and exposure to tobacco smoke
• High blood pressure • Diabetes mellitus • Obesity • Physical inactivity
Myocardial Infarction
• Life-threatening; occlusion of one or more coronary arteries
• Predisposing factorsheredity, obesity, aging, hypertension, cholesterol, smoking, diabetes, lifestyle
• Unrelieved crushing chest pain• ECG, cardiac enzyme levels
angiography,• CPR, hospitalization, bedrest• Prognosis is guarded
Heart attacks can have gender-specific symptoms
Congestive Heart Failure
• Impaired ability of the heart to pump blood
• Inadequate pumping of either left or right ventricles
• Signs/symptoms determined by which ventricles are affected
• ECG, chest x-ray, elevated venous pressure; echocardiography, angiography
• Tx includes diuretics, bedrest, vasodilators, digitalis, low-sodium diet
Thrombophlebitis
• Inflammation of vein with formation of a clot
• Caused by trauma, reduced blood flow, infection, prolonged immobility
• Dull ache and tightness at site; induration, redness, tenderness
• Dx’d by phlebography, US
• Tx depends if superficial or DVT
Reye’s Syndrome• Disruption of urea cycle;
accumulation of ammonia in blood, hypoglycemia, severe brain edema
• Affects children under 15; follows URI; use of ASA
• Signs/symptoms follow stages• Dx’d by lab tests: increase
ammonia in blood, liver function studies, spinal fluid analysis
• Tx to restore blood sugar levels, control cerebral edema, correct acid-base imbalances
• Prognosis dependent on which stage dx’d; fatal
Rheumatic Fever
• Systemic inflammatory disease• Likely complication of strep A
infection• Signs/symptoms: polyarthritis,
carditis, fever, chorea, subQ nodules over body surfaces, erythemia
• Dx’d by ASO (test for antibodies) increased WBC, elevated ESR, cardiac enzymes
• Tx of strep infection• Can cause scarring and
deformities of the valves
BLOOD THINNING WITH WARFARIN (COUMADIN)
• Drug used to “thin” blood
• Warfarin still used as rat poison
• Pro Time test essential