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28 Cards in this Set
- Front
- Back
Structure of the heart
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_chambers:4(LR atriums, LR ventricals), thoracix(betw.lung)
_layers:inner(endocardium), midd(myocardium),outter(epicardium) _Pericardial sac:inner layers:visceral; outer layers:parietal. _Pericadial fluid in sac=lubricant:allow movement of H. when it beat. _Septum: divide L & R atrial & ventrical. _Apex(PMI:point of proximal impluse)=apical pulse.Apex beat=beat of L ventrical. _Notes: +Atrial myocardium THINNER than Ventrical. +L ventrical(pump blood to systemnic sys) 3* THICKER than R ventrical |
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Blood flow
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super/inferior vene cava(deoxygenated blood)=>R.atrium=>(tricuspid valve/artrial ventricular valve)=>R. ventrical=>Pul.arteries(only arteries have deoxygenated blood in the body)=>lung(exchange gas=>oxygenated blood)=>pul.vein (only vein in the body carries oxygenated blood)=>L.artrium=>(mitral valve)=>L.ventrical=>(pul./aortic valve)=>tissues (systemic circulation)
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Valves:4_keep blood flow in forward direction
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_ atrialventricular valve(AV)/tricuspid & mitral valve: prevent blood regurgitation/back flow into R. atrium or L.ventrical.
_Pulmonary/Aortic valve(Semilunar Valves) prevent blood back to the L.ventrical. |
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Electrical conduction Sys.
Sequences & Problem |
E.impulse: SA node(R.atrium)=> AV node(R.atrium near R ventrical)=>
pause briefly (allow R.atrium contract/empty or filling up R.ventricular before it contract)=>travel to bundle of his(along intraventricular septum, by way of bundle branches)=>Action potential defuse wisely through both ventrical(by mean of purkinje fiber).This conductionsys. allow coordinated contraction of the H. chambers. ***When sequence: Very important _correct: get normal EKG _seizure up: problem=>life threatening ***2 problems can change the sequences: _Arteries got clotted/occluded=>damage the area _Electrical conduction sys. erruption |
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EKG
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_P=depolariation of atria_beginning firing of SA node
_QRS=depolariation fr. AV node to Ven._Impulse is delayed at AV node to allow time sequence between the end of P wave & begining QRS _T=repolariation of ventrical_restore to resting potential _Time interval(interval between the wave reflex)=length of time for the impulse travel fr. 1 area of the heart to another.***deviation fr. these time references, and wave alteration indicate pathology |
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Cardiac output_factors effect(ST:preload, afterload, contractility; HR)
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_CO=SV*HR= amt. of blood pump by each ventrical per minute.5L/min
_HR: regulate by ANS _SV:amt blood ejected by ventricular during ventricular contraction. *Starling Law: greater the fiber stretch=>greater the force of contraction. *factors effect: preload, afterload, contractility |
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Preload_med
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_amt blood in ventrical at the end of diastolic before next contraction.It determine the amt of stretch place on myocardial fibers.
*> stetch=>>force of next contraction=>Incr SV while HR constant=>Incr CO. We want CO is constant.=>NOT GOOD=>have to give med to DECR preload. _Med: Nitroglycerine: +Decr preload by dilate the vein. +Decr L. ventrical/diastolic pressure=> decr FDR (funtional diastolic resistance) +Decr O2 demand. +Use for Angina(more progress angina, less Nitroglycerine used) ***Administer: Light sensitivity, renew order q6months _Sublingual:3 pill, pil last 3 min, 5 min apart( 10/1005/1010) _Topical(patch):glove on, no touching,take off old patch when appy new one. |
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Afterload_med
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_pressure in the aorta and peripheral arteries that the left ventrical has to pump against to the blood out=resistance=how much resistance the ventrical has to overcome to get the blood out of the ventrical and to the body
_Effected by: sie of vein, wall tension, arterial BP _If aterial BP INCR=>INCR the resistance=>Ventricular have to work harder to compensate=>Ventricular hypertropy(Incr cardiac muscle tisse w/o InCR sie of cavity_enlargement of Ven. _Med to DECR after load, INCR SV, INCR CO. +ACE inhibitor +Arresoline +Hydralaine +Capoten **for CHF, HTN |
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Contractility_med
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_INCR contractility=>Raise SV by incr ventricular emptying
_INC by EP/NEP, dopamine(sympathetic nervous sys.) _MED: DIGOXIN *1st USE:INC contractility, SV, CO *2nd USE(for A.Fib patient: uncontrol=>life threatening_100<P<200:beatting so rapidly): slow conduction fr. AV node, prevent tranmission of every Atrial beat to ventrical. ***DIGOXIN: _B4 administer, check the apical pulse(<58:hold med, call doc) _monitor electolyte, esp.K+ _Normal Dig level=???? |
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Cardiac reserve
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_ability to response to (exercise, stress, hypovolemia) by altering CO threefold/fourfold(fight/flight response)
+HR can raise to 180 b/min with out any problem +regulation of the cadiovascular sys. thru ANS(sympathetic¶sympathetic): *Sympathetic(stimulation of autonomic sys)Increase HR, impulse of conduction to AV node, force of contraction of atrial &ventricular *Parasympathetic(indicated by Vegas nerve):DECR HR(action on SV node), Slow conduction thru AV node. |
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Coronary ateries:(CA)
RCA: right coronary arteries LCX:left circumflex arteries LAD: left descending ateries |
_Myocardium has it own blood supply fr. CA.
_IF blood supply by CA interupted: => Myocardium (H.muscles): loose abilities to Fnx =>Effect depend on the sie of area depride of O2 _If blood flow decrease gradually => pt. have chance to develop COLLATERAL CIRCULATION. |
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Collateral Circulation
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_Some arterial branching exists w/in coronary circulation.
_2 factors: +present of chronic ischemia +inherited predisposition to develop new blood vessels. |
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Aging process:
_collagen _valves _conduction sys: _on antianginal drug: Notes |
1/Collagen INCR, Elastin DECR=>effect contractility & distensibility(H.Valves not close tight=>regurtiatin=>effect SV, CO)
2/Valves:thicker & stiffer_undergo LIPID accumulation& Calcification, degeneration of valve collagen(esp:aortic & mitral valves)=>valves uncompetence_damage/stenosis=>murmur 3/No. of pacemaker cells in SA node decrease=>SA node dysfnx=>sinus bradycardia 4/Sympathetic Nervous sys. control cardiovascular sys decrease(Decre resp. to Physical and emotional stress(decr resp. to caecholamine & EP) _BLUNTEN resp.; decr Beta-adrenergic receptor=>less sensitive to beta-aderenergic drugs **Notes: +Resting HR is not effected by aging +Apical response to MI (extremely fatigue, weakness, SOB). +Cardiac rep. to exercise striking decr in cardiac resp(SV, CO, HR decre).CO decr 1%/year). **If pt. on ANTIANGINAL drugs(Nitroglycerine)cause: +Hypotention(dilate vein): need to sit 5 min b4 getting up +Slow HR in pt have degeneration of conduction sys. +Incr. Risk of TOXICITY (Bcuz kidney & Liver Dysfnx: med accumulate in body longer) ***Envolve pt on Exercise Program: Ince seft-esteem& socialiation=> feeling of moving. |
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Physical assessment
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i
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Cholesterol
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THE LOWER THE BETTER(<200)
_HDL:>60 _LDL:<100, AT RISK:<70, AT HIGH RISK:<40 _TRIGLYCERIDE:<150 _CRP (C-REACTIVE PROTEIN):<3,<2, NORMAL=1 |
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CARDIAC TESTS AND BENEFITS
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1/CPK(CK=creatine Kinase):
_3 different enzyme:CPk, Brain, Skeletal. _If CK INCR=>isoenzyme MB for heart(take 12-24h to peak) 2/Troponin: _Cardiac DEFINITIVE.They can send pt home if the troponin status is normal regardless the CPK level. _Can use to Dx MI for up to 1 week after the event 3/C-Reactive protein Test(CRP)( testing for inflamation too) _INCR CRP => INCR risk for MI _CRP made in liver and in the wall of coronary artery. _1 1/2 million ppl in US have MI(leading cause of death_CA:2nd cause od death), 1/2 of these ppl have low LDL=>the inflamatin theory come in. **This test is not a DEFINITIVE testfor H.Disease compare to CPK and Troponin becuz other things also cause inflammation.EX: +Pt have chronic disease/infection, smoke/sedentary lifestyle=>CRP =abnormal. _Normal: CRP < 1mg/L _Abnormal: CRP >3 mg/L of blood. _Risk factor: <2 **This is a alert test to potential pro.Can't use this test for DX Heart problem. If rule out every causes elses, it may indicate H. problem. *Test dose not prevent the Heart disease. it ony help to look for the risk factor!!! 4/ Homocystine: _Amino Acid(containing Sulfa) _Break down fr. Amino Acid NETHIONINE( essential amino acid-found in dietary protein) _High level of Homocystine link to INCR risk of CAD. _High level of homocystine contribute to artherosclerosis by damaging inner lining of blood vessel, promoting plaque to build up & altering clotting mechanism=>clot occur _TX: B complex(B6. N12, folic acid)( SE: flushing, uncomfortable) |
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TERMS:
+ASHD +CAD +CVHD +ACS |
ASHD=athorosclerosis heart disease(AS=atherosclerosis, HD=heart disease)
+CAD=coronary artery disease +CVHD=Cardiovascular heart disease +ACS=Acute coronary syndrome +CHD: coronary heart disease |
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_3 THEORIES:
+DEVELOPMENT OF ATERIOSCLEROSIS. _INFLAMTION _HOMOCYSTINE |
3 theories contribute to predict the potential Heart disease:
1/ Development of artherosclerosis in the vascular sys=>INCR risk of CAD 2/ Inflammation test(CRP) after rule out all causes also alert potential for MI if CRP level INCR 3/ Homocystine theory:INCR level of this acid amine=>INCR potential of CAD, and atherosclerosis. |
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THEORY: THE DEVELOPMENT OF ATERIOSCLEROSIS in vascular sys.
+FATTY STREAKS +SMOOTH MUSC. CEL PROLIFERATION +COMPLICATED LESION |
1/ Fatty streaks:
_lipid fill through smooth musc cells(yellow stringe)=>fiber plaque(begin at 15=>30 y.o.)=>injure endothelial layer(caused by:HTN, high choles., heredity, CO2 poisoning fr. smoke) 2/ Smooth muscle cells proliferation: _Edothelial injury _Lipoprotein transport choles. to arterial intima.Lipid damage smooth muscle& thicken the fiber plague=>lesion(Gray, dark white) buid up and is covered by collagen tissue, elastic fibers, smooth cells filled with fat. _Platelet INCR in large No., arteries is damage=>thrombus(adhere to the wall=>occlude the arteries LUMEN) 3/ Complicated lesion:Most dangerous. _Plague(cord of lipid material) w/in area of death tissue.Lesion bcome Complex, harden, darken=>necrosis=>totally/partially occulde the arteries. |
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THEORY: INFLAMTION
_GOAL _Tx: _TESTING: _ADV& DISADV: |
_Direct early steps of atherosclerosis plague
_Goal: +Stablize the plague , ease inflammation, prevent plague rupture _Prevention: +Exercise, lose wt, control HTN, certain meds, DECR LDL... _Tx: +Statin=> DECR LDL +ACE inhibitor=>HTN +Stop smoking, keep bl. sugar under control, healthy diet _Testing for inflamtion:C-reactive protein level( CRP)... |
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THEORY: HOMOCYSTINE
_DEF: _TX: |
_amino acid(containing sulfa, is produced fr. breaking down amino acid NETHIONINE which found in dietary protein.
+High level of homocystine link to INCR risk of CAD +High level of homocystin contribute to artherosclerosis in blo. vessel by damaging inner linning,promoting plague buid up , altering clotiing mechanism=>clot occur _Tx: B Complex( B6, B12, Folic Acid)=>SE: flushing, uncomfortable |
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RISK FACTORS OF CAD:
_MODIFIABLE _UNMODIFIABLE |
_risk factor of CAD:INC serum lipid, HTN, Cigarette smoking
_Modifiable: +INCR serum lipid +HTN +Smoking +Diabetes +Obesity +Stress +Secondary lifestyle _Unmodifiable: +Age: +Gender: +Heredity +Race: **Risk for MI: _white middle age male _>60, male=female _Female are seen w/ CAD earlier bcuz of: stress, smoking, HTN, birth control pills..) **Family Hx of diabetes have greater risk( even w/ well control). Diabetes manifest CAD earlier equal to M & F |
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LIPID LEVEL A/S CAD
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_triglyceride: <150
_Lipid to be used in transport need to be soluble in blood by combining w/ Protein( lipoprotein). They are vehicle for fat mobilization and transport. |
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CHOLESTEROL LEVEL A/S CAD:
+LEVELS: +NUTRITION: +MED : TO DECR CHOLESTEROL +MED TO RESTRICT LIPOPROTEIN, DECR LDL & HISTAMINE |
_<200; LDL:<100(N), <70(R), <40(HR), HDl:>60
_HDL: +lipid away from arteries to the liver for metabolism +Femal & children have greater HDL +HDL2 protect the arteries +Exercise: INCR HDL & HDL2 +Low level in Heart attack pt. _LDL: Contain cholesterol, NEED to DECR level. _Nutrition: keep wt normal, DECR:saturated fat, R.meat, Salt intake, Alcohol **Ifcholesterollevel>200, Try healthy diet, retest w/in 3 months. If not DECR, use MED _Decr Cholesterol: Questran, Colestid _Restrict lipoprotein, Decr LDL, histamine: Niacin(B Vit.), Atromid, Lopid, Mevacor,Aspirin ** ASA: Antiimflammation, Antiplatelet, Antiaggregate, Antithrombosis.Help decrease prostaglandins(result od inflammation) |
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HYPERTENTION:
1/ PRIMARY HTN 2/ SECONDARY HTN |
**HTN:
_Sustain(140/90), desire(120/80). _Affect atherosclerosis:shearing stress causing denuding of endothelial lining. _May contribute to Stroke, Renal failure(A/s with, Not cause). _Silent KILLER( bcuz:NO SYMPTOMS) 1/ Primary HTN: _95% all cases. _Exactly cause:UNKNOWN _INCR CO & SDR (systemic vascular resistance) _Gerotology: prevalent elderly >60 y.o. given following reasons: +Loss tissue elasticity, INC collegen +Stiffnessof myocardium +INC peripheral resistance +Decr renal Fnx +Elderly on Antihypertentive drug may DECR/ALTER absorption of drug=>Slenic blood flow=>TOXIITY +Postural HTN bcuz of Meds/ Vol depleted=>dehydration=>DECR BP.=>MD start fr. LOWER dose . 1/ Secondary HTN: _5%, other process kick in cause HTN: Rena dis., head injury, sleep apnea, pregnancy, DM, Lupus, certain meds, Birth control pill. _If symptom occur, they fr secondary cause=>effect on the target organ damage. +S/s:fatigue, DECR activity tolerance, diziness, palpitation, angina +Target organs:CAD, L. Ventricular hypertropy, CVD, PVD, renal insufficiency, Retinopathy. |
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TREATMENT FOR HTN:
1/Life style modification 2/Na+, Alcohol restriction 3/Loose wt. 4/Physical active 5/HTN MEDICATION: _ACTION: _GOAL: _CATEGORIES(abcd & n) +Adrenergic inhibitor & Angiotensin inhibitor +Beta blocker +Calcium channel blocker +Diuretic +Nicotine ***NOTES: |
1/Life style modification
2/Na+(DASH diet), Alcohol restriction 3/Loose wt.: >30 % BMI=>consider obese. Obese not lead to HTN, but HTN present 60% obese ppl.Motality of CAD high in obesity ppl 4/Physical active:30 min, 3 X per wk, >30-50 beats/min 5/HTN MEDICATION: _ACTION:DECR SVR & BP _GOAL:drop BP<135/85(young), elderly <140/90 _CATEGORIES(abcd & n) +Adrenergic inhibitor : *Vasodilator, Decr SVR, BP *Don't abruptly STOP=>rehab HTN +Angiotensin inhibitor(ACE inhibitor) *NIGHT best +Beta blocker: *DAY best *DECR myocardial contractility,HR, SVR, BP=>O2 demand *SE: bradycardia, Hypotension, wheezing, GI, Wt.gain, depression +Calcium channel blocker *Systemic/ coronary vasodilation, DECR SVR, myocardial contractility *Potentiate the action of Digoxin=>monitor Dig level +Diuretic *DAY/NIGHT *Inhibit NaCl reabsorption(INCR Na+, Cl-) *DECR SVR, BP moderatly w/in 2-4 wks +Nicotine: *Cause Catecholamine release *INCR HR, BP, cardiac work load *Peripheral vasoconstriction, greater myocardial, O2 consumption, contain cusenic & benzine ***NOTES _Start at lowest dose, least expensive, least SE _Tx w/in 2 months. If BP not decr, add 2nd med or change med. |
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_DIFFERENT RANGE OF BP:
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_OPTIMAL:<120/<80
_NORMAL:<130/<85 _HIGH NORMAL:130-139/85-89 _HTN Stage I:140-159/90-99 _HTN stage II:160-179/100-109 _HTN stage III:>=180/>=110 |
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Stress:Type ABCD personality
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_A: anal, control, eady get mad, perfect, agenda
_B: easy going, does not get mad _C:combination _D:??? |