CCT Exam – MISC || with 100% Verified Solutions.

Atrial hypertrophy is caused by... correct answers -Increase in blood volume (dilation of atria) -Increase in resistance to blood flow in atria (thickening of walls) ST segment and T wave represent: correct answers repolarization of the ventricle U-wave represents: correct answers final phase of Purkinje repolarization Leakage current correct answers the electrical current that flows through the ground conductor (if a ground conductor is not present, leakage current could flow to any conductive surface) Ground connectors correct answers divert extraneous or leakage electrical current to the ground or earth What may impede the proper functioning of a pacemaker? correct answers Large magnets, high voltage current, medical devices (MRI) Fire extinguishers appropriate for electrical fires: correct answers Class "C" fire extinguishers *can use baking soda. NOT water. Respiratory sinus arrhythmia correct answers sinus rhythm increases with inhalation and decreases with exhalation Sinus arrhythmia correct answers a variation of more than 0.16 seconds in PP or RR intervals The PR interval is sinus tachycardia is.... correct answers shorter than in average sinus rhythm Ventricular tachycardia that changes its axis is called.... correct answers Torsades de pointes The double product considered adequate in stress testing: correct answers 20,000 (MHR x SBP) One MET = correct answers 3.5 ml/kg/min Each stage in the Bruce protocol increases by approximately... correct answers 2-3 METs Modified bruce protocol correct answers First stage = 1.7/0% (2.9 METs) Second stage = 1.7/5% (3.7 METs) Moderate and Vigorous Intensity (METs) correct answers Moderate = 3-6 METs Vigorous = >6 METs Thallium correct answers a chemical used in nuclear imaging (others include technetium sestamibi, technetium tetrofosmin)