Dysrhythmias Part 2 Test Questions with 100% Complete Solutions, Rated to Pass

Premature Ventricular Contractions (PVC): Cause - cORRECT sOLUTION - Not harmful with normal heart - In heart disease pts. PVCs reduce CO and lead to angina and HF depending on frequency - Associated with stimulants: caffeine, alcohol, nicotine, aminophylline, epinephrine, isoproterenol, digoxin, electrolyte imbalances, hypoxia, fever, exercise, and emotional stress. Heart diseases associated with PVC include... - cORRECT sOLUTION - MI - mitral valve prolapse - HF - CAD Treatment of PVC (only if symptomatic) - cORRECT sOLUTION - Correct cause = assess the patient - If electrolyte abnormality like low potassium = give potassium - Anti-dysrhythmics If they have a lot of PVC... - cORRECT sOLUTION Chemistry panel to make sure electrolytes are all okay (potassium, magnesium, sodium, calcium) Ventricular Tachycardia - cORRECT sOLUTION - Myocardial cells in the ventricle take over as pacemaker - Sustained or non-sustained - Considered *life-threatening* b/c decreased CO and the possibility of deterioration to V. fib a run of three or more PVCs defines... - cORRECT sOLUTION Ventricular Tachycardia - 150 to 250 beats/minute. Venticular Tachycardia is associated with... - cORRECT sOLUTION - MI, mitral valve prolapse, CAD, cardiomyopathy, CNS disorders, electrolyte imbalances, long QT syndrome, drug toxicity, - Precipitating causes must be identified and treated (hypotension, ischemia) VT with pulse (stable) treated with... - cORRECT sOLUTION antidysrhythmics - Drugs that prolong the Q-T interval should be d/c - Cardioversion is used if drug therapy is ineffective VT with pulse (unstable) treated with... - cORRECT sOLUTION cardioversion - shock at the QRS - don't shock during vulnerable QT interval Pulseless VT treated with... - cORRECT sOLUTION - CPR and rapid defibrillation *Call a CODE!* →→followed by vasopressors (epinephrine) and antidysrhythmics (amiodarone) if defibrillation is unsuccessful sustained VT causes... - cORRECT sOLUTION severe decrease in CO - leads to hypotension, pulmonary edema, decreased cerebral blood flow, cardiopulmonary arrest Ventricular Fibrillation is a.... - cORRECT sOLUTION LETHAL rhythm -"quivering," with no effective contraction, no CO occurs Ventricular Fibrillation is associated with... - cORRECT sOLUTION - MI - myocardial ischemia - disease states (HF, cardiomyopathy) - procedures (pacing, cardiac cath.)