Advanced - Dysrhythmias Questions And Answers 100% Verified A+ Guaranteed

Sinus Bradycardia {Ans: excessive vagal (parasympathetic) stimulation to the heart causes a decreased rate of sinus node discharge. May result from carotid sinus massage, vomiting, suctioning, Valsalva maneuvers, ocular pressure, pain, hypoxia, inferior wall MI, and administration of drugs such as beta-adrenergic blocking agents, calcium channel blockers, and digitalis. Increases coronary perfusion time, but it may decrease coronary perfusion pressure. However, myocardial oxygen demand is decreased. Symptoms: -asymptomatic -syncope ("blackouts" or fainting) -confusion -dizziness/weakness -hypotension -diaphoresis (excessive sweating) -shortness of breath -chest pain Treatment: -medications (atropine 0.5mg IV) -IV fluids (increase intravascular volume) -oxygen}3 {Ans: Class ________ antidysrhythmics lengthen the absolute refractory period and prolong depolarization and the action potential duration of ischemic cells. Ex: amiodarone (Cordarone) and ibutilide (Corvert). Used to treat or prevent ventricular premature beats, ventricular tachycardia, and ventricular fibrillation.}Atrioventricular Blocks {Ans: When supraventricular impulses are excessively delayed or totally blocked in the AV node or ventricular conduction system, ventricular depolarization and QRS complexes are delayed or blocked. Can be classified as 1st, 2nd, or 3rd degree.}Second-Degree {Ans: _______________________ atrioventricular block can be broadly defined as a condition in which some atrial impulses are conducted to the ventricles but others are "blocked" at