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65 Cards in this Set
- Front
- Back
This systems supplies O2 and nutrients to the cells and removes metabolic wastes to the excretory organs
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The Cardiovascular System
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Comprised of the sympathetic and opposing parasympathetic system
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Autonomic Nervous System
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The sympathetic nerve ends secrete
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norepinephrine
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The parasympathetic nerve ends secrete
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Ach to activate cholinergic receptors
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contains it’s own conduction system w/o stimulation from the CNS
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myocardium
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this activity always precedes mechanical activity
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Electrical
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The dominant pacemaker of the heart located in the upper wall of the
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right atrium
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This forms the P wave on the EKG
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SA node
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The ability to generate pacemaking stimuli is Called
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automaticity
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Depolarization slows when it reaches the AV node to allow the blood in the atria to enter the ___________
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ventricles
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Class I Antidysrhythmics
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Sodium channel blockers
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Class II Antidysrhythmics
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Beta-receptor blockers
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Class III Antidysrhythmics
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Potassium channel blockers
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Class IV Antidysrhythmics
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Calcium channel blockers
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________________ is a Class 1b – suppresses automaticity of the conduction tissue by increasing the electrical stimulation threshold of the ventricle
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Lidocaine
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There are three different Class II (Beta-blocker) divisions… name them
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cardiac specific (propranolol), non-cardiac specific (metoprolol), and combination (labetalol)
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These block the movement of potassium during the 3rd phase of the action potential (cell membrane recovery), prolonging repolarization and the refractory period
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Class III – Potassium Channel Blockers (Amiodarone)
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These inhibit the movement of calcium through the slow calcium channels of the SA and AV nodes during the 2nd phase of the action potential
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Class IV: Calcium Channel Blockers (Cardizem)
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Name some Unclassified Anitarrhythmics
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atropine, dopamine, digoxen, magnesium, adenosine
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What does Atropine block the effects of?
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the effects of acetylcholine on the SA and AV nodes
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Which drug causes asystole briefly?
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adenosine
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Which class of drugs is most likely to exacerbate the symptoms of asthma?
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Beta receptor blockers
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Name symptoms indicative of digoxin toxicity
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blurred vision, confusion, irregular pulse
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______________ acts on angiotensinogen to cleave off the peptide angiotensin I
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renin
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_________________ is a potent vasoconstrictor and the principal pressor of the renin-angiotensin system
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Angiotensin II
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Normally renal ___________ excretion is increased in response to elevations in arterial pressure and to a sodium or volume load
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sodium
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Hypertensive individuals may exhibit a diminished ability to excrete a __________ load
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sodium
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True or false - Essential hypertensive pts often have elevated Na+ levels in blood cells and other tissues
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True
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Exacerbating Factors of HT
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obesity, diet, EtOH, smoking, sedentary lifestyle, hypokalemia
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________________ is used to control ventricular response and rate in A-fib and A-flutter. Also used for HTN, and as antianginals
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beta-blockers
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Consequences of Uncontrolled HTN
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CAD, left ventricular hypertrophy, Heart failure, strokes and TIA, kidney failure, peripheral artery disease, retinopathy
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Pharmacologic Management of Hypertension includes
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diuretics, sympatholytics, ACE inhibitors, ARBs, Ca channel blockers, and direct rennin inhibitors
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Diuretics produce increased urine flow by inhibiting ____________&_____________ reabsorption from the kidney tubules.
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sodium and water
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Name the classes of diuretics
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Thiazide, Loop, Osmotic, Carbonic anhydrase inhibitors, Potassium-sparing
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This is an example of a Loop Diuretic which produces more dieresis… Often used in CHF and less often in HTN
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Lasix
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__________ Reduce HR, contractility, and rennin release
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Beta-Blockers… Nonselective agents can cause bronchial constriction.
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These cause Venous and arterial dilation as well as relaxation of the muscles in the bladder neck and prostate… generic ending of “zosin”
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Alpha 1 Adrenergic Blockers
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Dec sympathetic outflow of norepi resulting in vascular dilation and reduced HR
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Alpha 2 agonists… ie Clonidine (Catapres)
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This class inhibit the formation of angiotension II and block the release of aldosterone… end in “pril”
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ACEIs
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Act on the renin angiotensin system and block angiotensin II from the AT1 receptors while ACEs inhibit the formation of angiotensin II… end in “sartan”
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ARBs
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Calcium Channel Blockers end in
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“dipine”
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_________ is used for hypertensive emergencies
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Nitroprusside
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An example of a Direct Renin Inhibitor is___________
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Aliskiren (Tekturna)
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_________________ generally have a high-renin HTN and respond well to all anti-hypertensive agents
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Caucasians
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____________ __________ generally have a low-renin HTN and respond better to CCB, alpha blockers and diuretics
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African Americans
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The ________________ population is twice as sensitive to beta-blockers as the Caucasian population
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asian
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__________________ Americans have a reduced response to beta blockers
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native
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Acute CP from insufficient O2 to a portion of the myocardium
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angina pectoris
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Typically ________ _______ is reported as steady and intense with a crushing or constricting sensation that radiates to the L shoulder and arm. Sometime moving in the jaw or back
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angina pectoris
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Used to terminate an acute episode or decrease frequency of attacks
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anti-anginals
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Goal is to reduce myocadial O2 demand by
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slowing HR, dilating veins, reducing contractility, and lowering BP
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Anti-Anginal drug classes
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Beta Blockers, CCB, and organic nitrates
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These Relax smooth muscle to produce valsodilation on veins and arterioles
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nitrates
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A __________ can become dislodged and become an embolus
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thrombus
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Drugs for Circulatory Disorders
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Anticoagulants, Antiplatelets, Thrombolytics, Antilipemics, Peripheral Vasodilators
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What is the time interval between tests on submarine cable?
A. Annually B. Semiannually C. Quarterly D. Monthly |
A. ANNUALLY
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These Prevent thrombosis in the arteries by suppressing platelet aggregation
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antiplatlets
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Substances that dissolve or break down a thrombus or blood clot
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thrombolytics
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Increase blood flow to the extremities & are used in PVD of venous and arterial vessels
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peripheral vasodilators, ie tolazoline (Priscoline), isoxsuprine (vasodilan), nictinyl alcohol, papaverine (Cerespan)
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What is the antagonist of Heparin?
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Protamine sulfate
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What class prevents clots?
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anticoagulants
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What class prevents platelet aggregation?
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antiplatelets
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What class dissolves clots?
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finbrinolytics
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This disease is where the heart cannot pump enough blood to meet the needs of the body
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CHF
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Drugs used for CHF
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ACEs, B-Blockers, Diurectics, BiDil, Vasodilators, Cardiac glycosides, Phosphodiesterase inhibitors
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