Pharm Week 8 Flashcards
There is no cure for Heart Failure (True of False)
True
Diseases that cause or accelerate HF
mitral stenosis, myocardial infarction (MI), chronic hypertension (HTN), coronary artery disease (CAD), diabetes mellitus
What causes cough and shortness of breath in HF
Blood backs up into the lungs
Cause of left sided HF
excess blood accumulates in the left ventricle, causing it to thicken and enlarge (hypertrophy) in order to compensate for the increased workload
Cause of right sided HF
excess blood backs up into veins, resulting in peripheral edema and engorgement of organs, such as the liver
What should a nurse monitor in HF and diuretic therapy
electrolyte levels, weakness, hypotension, confusion, vital signs, intake and output, blood glucose , blood-urea nitrogen (BUN)
What is the max amount of sodium a heart failure pt should intake
4000mg daily
ACE inhibitors
lisinopril, captopril, zestril
ACE inhibitor side effects
cough, headache, dizziness, orthostatic hypotension, first-dose phenomenon, hyperkalemia; Serious adverse effect-angioedema*
contra-indications of ACE inhibitors
hyperkalemia
Labs to monitor while on ACE inhibitors
BUN, creatinine, K+
Mechanism of action in ACE inhibitors
inhibits conversion of angiotensin I to angiotensin II and decreases aldosterone secretion; BP is decreased and CO is increased
What blocks the action of ACE inhibitors
NSAIDS
Cardiac glycosides
digoxin and lanoxin
MOA of cardiac glycosides
increases contractility of heart and slows conduction which improves cardiac output
Adverse effects of cardiac glycosides (digoxin and lanoxin)
n/v dysrythmia, visual disturbances(halos,yellow-green tinge, blurring)
Serious adverse effect: dysrhythmias especially in the presence of hypokalemia**
Metoprolol side effects
bradycardia, orthostatic hypotension, abnormal sexual function, drowsiness, fatigue
Contra-indications of metoprolol
asthma, COPD
which drug enhances effects of hypoglycemics
metoprolol
Electrical conduction pathway
sinoatrial (SA) node, across both atria>atrioventricular (AV) node> atrioventricular bundle (bundle of His)>to the right and left bundle branches>Purkinje fibers
What is the most common type of dysrthymia
Atrial fibrillation
Types of Dysrhythmias
Premature atrial contraction (PAC)
Premature ventricular contractions (PVC)
Ventricular tachycardia(VT)
Atrial flutter (AF)
Atrial fibrillation (A Fib)
Sinus bradycardia (SB)
Heart block (1st, 2nd, 3rd degree)
When does generation of the action potential
begins when sodium-ion channels open and sodium ions rush in
Depolarization (contraction)
calcium-ion channels open and calcium ions enter the cell, stimulating cardiac-muscle cells, SA and AV cells depolarize in response to calcium-ion influx
Repolarization (resting)
return to a polarized state, sodium pump removes sodium from the cell, potassium-ion channel
Nonpharmacological therapies for dysrhythmias
Cardioversion and defibrillation-(ventricular tachycardia, ventricular fibrillation)electrical shock that stops all electrical impulses in the heart and allows the sinoatrial node to regain control
Catheter ablation- identifies and destroys aberrant cardiac cells that cause dysrhythmias
Cardiac pacemaker-paces the heart at a set rate
Implantable cardioverter defibrillators (ICDs)-combination of pacemaker and defibrillator
Sodium-ion-channel blockers (Class IA)
procainamide, quinidine
Side effects of sodium channel blockers (procainamide, quinidine)
hypotension, headache, cardiotoxicity
Labs to monitor on Sodium channel blockers
CBC-neutropenia, TPC
Beta-adrenergic blockers (Class II)
propranolol, esmolol
Primary use of propanolol, esmolol
treatment of tachycardia, hypertension, angina, migraines, prevention of MI
Adverse effects of propanolol and esmolol
bradycardia, hypotension, fatigue, diminished libido; masks hypoglycaemia for those taking insulin
Contra-indication of beta blockers
asthma
When to hold beta blockers
Pulse < 60
Mechanism of action of potassium channel blockers
decreases contractility & dilates blood vessels
Potassium channel blockers
amiodarone
Side effects of amiodarone
blurred vision, rashes, photosensitivity, n/v, fatigue, dizziness, hypotension BBW* pumonary toxicity
Calcium channel blockers (Class IV)
verapamil, diltiazem
Side effects of calcium channel blockers
bradycardia, orthostatic hypotension, heart failure, flushed skin, constipation, edema
Drug interactions of calcium channel blockers
increased effects of digoxin toxicity; no statins- increases muscle pain
mechanism of action of calcium channel blockers
slows conduction velocity, lowers blood pressure, reduces cardiac workload
how long does it take normal clotting to occur
6 minutes
deficiency of platelets < 100,000
Thrombocytopenia
bleeding disorders caused by genetic deficiencies in specific clotting factors
Hemophilias
inhibit specific clotting factors, thereby inhibiting the aggregation of these cells, preventing Clots from forming or growing larger
Anticoagulants
Parental anticoagulant
Heparin
MOA of heparin
Inhibits thrombin activity,prevents enlargement or formation of clots (does not dissolve clots)
Side effects of heparin
abnormal bleeding and heparin-induced thrombocytopenia (HIT), results in the opposite effect of excessive bleeding
Heparin BBW
do not administer to patients with an epidural or will cause hematoma
Heparin OD
protamine sulfate- reverses in 5 minutes
Oral anticoagulant
Warfarin (Coumadin)
MOA of Warfarin
inhibits the action of vitamin K
Primary use of warfarin
prevent stroke, MI, DVT, and pulmonary embolism
side effect of warfarin
abnormal bleeding
Nursing for warfarin
monitor PT/ INR; Avoid vitamin K supplements and protein supplement drinks, and limit intake of garlic
Warfarin OD
Vitamin K- reverses in 6 hrs
Antiplatelet, ADP-receptor blockers
clopidrogrel (Plavix)
MOA of clopidrogel
inhibiting ADP from binding to its receptor
primary use of clopidrogel
prevent thromboembolic events in patients with a recent history of MI, CVA, or peripheral artery disease
side effects of clopidrogel
abnormal bleeding, flulike syndrome, headache, dizziness, bruising, and rash or pruritus, tcp
Thrombolytic
altepase (Activase)
MOA of altepase
dissolves the clot
side effect of altepase
abnormal bleeding
contra indications of altepase
hemorrhage, CVA, recent trauma or surgery, aneurysm
Nursing for altepase
check vs q 15 minutes, bedrest, hold pressure x 30 minutes, no IM/SQ injections