RCES QUESTIONS WITH 100% VERIFIED ANSWERS!!

RCES QUESTIONS WITH 100% VERIFIED ANSWERS!! 3rd degree AV block - ANSWER-atria and ventricles beat independently of each other (P waves have no relation to QRS waves) .Adenosine is an example of a class ___ antiarrhythmic - ANSWER-Class V/ Non Classed .During phase 2 of the action potential, what ion is responsible for heart muscle contraction? - ANSWER-CA2+ .If lead insulation is fractured, lead impedance will - ANSWER-Decrease .If VT originates in the LV, there will be a _____________________ morphology? - ANSWER-Right Bundle Branch Block (positive in lead V1) .Of the blocks listed below, which would be an indication for for a pacemaker? (Select all that apply) A: 1st degree heartblock B: 2nd degree, type 1 heartblock C: 2nd degree, type 2 heartblock D: 3rd degree heartblock E: Left bundle branch block more than 120ms - ANSWER-C, D, E .On which catheter would you first see PVCs - ANSWER-RV catheter .Referring to equation V=IR, which relates voltage to current flow and resistance, reducing the voltage by half will do what to the resistance? - ANSWER-it will decrease by half .The irregular bands of tissue projecting from the inner surfaces of the ventricles are called - ANSWER-Trabeculae carnea .The resting membrane potential of the ventricular action potential is: - ANSWER--90 to -100 mV .The second letter in the NBG Device code refers to: - ANSWER-chamber sensed .The two primary cardiac responses associated with a Sympatheticneural discharge are ________heart rate and _________ AV conduction - ANSWER-increased, increased .True of False: The AV node is located at the apex of the triangle of Koch? - ANSWER-True .True or False: A SNRT is used to evaluate the health of the AV node - ANSWER-False .True or False: administering adenosine will terminate Atrial Tachycardia - ANSWER-False .True or False: An HV interval of 120ms would be an indication for a pacemaker? - ANSWER-True .True or False: Extra-stimulus pacing from the HRA catheter will allow you to find the patient's AERP and AVNERP - ANSWER-True .True or False: The absolute refractory period is the period of time when a stimulus of sufficient strength can initiate an Action Potential. - ANSWER-False .What 3 criteria are needed to sustain a reentry circuit? - ANSWER-1.) Parallel pathways that are connected proximally and distally, forming an electrical circuit 2.) One of the pathways needs a refractory period that's substantially longer than the refractory period of the other 3.) The pathway with the shorter refractory period must conduct electrical impulse more slowly than the other pathway .What 3 structures make up the triangle of Koch? - ANSWER-1.) Septal leaflet of the tricuspid valve 2.) CS ostium 3.) Tendon of Todaro .What are afterdepolarizations? - ANSWER-Abnormal secondary voltage depolarizations during the cardiac action potential .What are the 3 cusps of the aortic valve? - ANSWER-1.) Left Coronary Cusp 2.) Right Coronary Cusp 3.) Non Coronary Cusp .What are the AV valves? - ANSWER-tricuspid and mitral; they are open during ventricular systole .What are the Class I AADs - ANSWER-Sodium Channel Blockers .What are the Class Ia AADs? - ANSWER-Quinidine, Procainamide, Disopyramide (Norpace)