2025(Latest Update) Relias telemetry test: Questions and answers, Exams of Nursing

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2025(Latest Update) Relias telemetry test:

Questions and answers

3 drugs that can prolong QT interval - ansLidocaine, Amiodarone, digoxin, haldol Absolute refractory period - ansAll the cells can't respond to any stimulus; encompasses the QRS and the first part of the T wave Escape - ansIf the SA node fails as pacemaker or it's rate drops below the normal range, the AV junction would probably take over. Safety mechanism/fail safe Irritability - ansWhen the AV junction or ventricle speed up and take over as pacemaker; become faster than SA node Order of Conduction - ansSA node--> intraatrial pathways--> AV node--> Bundle of HIS-->left & right bundle branches--> purkinje fibers P wave represents - ansAtrial depolarization PRI - ans0.12-0.20 seconds Represents both atrial depolarization & delay in AV node QRS - ansLess than 0.12 seconds Ventricular depolarization Sympathetic branch - ansAffects both the atria and ventricles. Increases HR, conduction, and irritability T wave represents - ansVentricular repolarization What arrhythmias may require a pacemaker - ansSymptomatic AV blocks: -second degree type I

3rd degree heart block - ansno obvious correlation between p and qrs, need pace maker Accelerated Idioventricular Rhythm - ansRate: 50 - 100 usually (usually slow) P wave: Obscured by ventricular waves (occur during ventricular contraction) - SA node slower than faster ventricular pacing than should be QRS: Wide QRS Conduction: Ventricular only Rhythm: Regular

• benign rhythm that is sometimes seen during acute MI or early after reperfusion.
• Rarely sustained, does not progress to vfib, rarely requires treatment asystole - ansabsence of contractions of the heart Atrial Fibrillation (A-Fib) - ansan irregular and often very fast heart rate originating from abnormal conduction in the atria Atrial Flutter - ansirregular beating of the atria; often described as "a-flutter with 2 to 1 block or 3 to 1 block" Atrial paced rhythm - ansspike before P wave Bigeminy PVC - ansevery other beat is a PVC Failure to capture (pacemaker) - ans failure to sense (pacemaker) - ans First degree heart block - ansatrioventricular (AV) block in which the atrial electrical impulses are delayed by a fraction of a second before being conducted to the ventricles Idioventricular Rhythm - ans< looks like vtach but slow
• no P waves (from vent foci)
• Wide QRS (serious, death like rhythm)
• called "dying heart" rhythm...occasional ventric beat b4 death (asystole)

Junctional Rhythm - ans40-60 Regular! -impulse from AV node w/ retro/antegrade transmission

• P wave often inverted/buried/follow QRS
• slow rate
• narrow QRS (not wide like ventricular)

Supraventricular Tachycardia (SVT) - ansan abnormal heart rhythm arising from aberrant electrical activity in the heart; originates at or above the AV node Torsades de pointes - ansRate: 120 - 200 usually P wave: Obscured by ventricular waves

QRS: Wide QRS - "Twisting of the Points" Conduction: Ventricular only Rhythm: Slightly irregular Ventricular fibrillation (V-fib) - ansabnormal heart rhythm which results in quivering of ventricles Ventricular paced rhythm - ansventricular contractions which occur in cases of complete heart block.