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CCRN AACN Exam Questions and Answers
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CCRN AACN Exam Questions and Answers atrial fibrillation adverse consequences - Ans:-1. decreased cardiac output due to loss of atrial kick, rapid ventricular rate, irregular ventricular rhythm 2. tachycardia induced cardiomyopathy - in rapid afib for prolonged period of time 3. thromboembolism...

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  • October 23, 2024
  • 87
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ccrn aacn exam questions and answers

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©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




CCRN AACN Exam Questions and Answers


atrial fibrillation adverse consequences - Ans:✔✔-1. decreased cardiac output due to loss of atrial kick,

rapid ventricular rate, irregular ventricular rhythm




2. tachycardia induced cardiomyopathy - in rapid afib for prolonged period of time




3. thromboembolism


right bundle branch - Ans:✔✔--right side of the interventricular septum and right ventricle


-impulse travels slower as the right ventricle is smaller/thinner


left bundle branch - Ans:✔✔-two main divisions: anterior fascicle and posterior fascicle carrying impulses

to the left ventricle


PR interval - Ans:✔✔-delay of AV node to allow filling of ventricles


QRS complex - Ans:✔✔-ventricular depolarization




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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




shape depends on the lead that is being monitored and the ventricular activation device


T wave - Ans:✔✔-ventricular repolarization




normally in the same direction as the QRS




upright, flat, inverted


pathologies of T wave - Ans:✔✔-MI, E/L levels, drug effect, myocardial disease, and lead being recorded


u wave - Ans:✔✔-repolarization of the purkinje fibers




SHOULD BE POSITIVE especially when T wave is positive




large u waves can be seen when repolarization is abnormally prolonged - E/L imbalances like

hypokalemia, hypocalcemia, hypomagnesemia, IICP, LVH, certain medications


ST segment - Ans:✔✔-early ventricular repolarization




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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




should be at isoelectric line


J point - Ans:✔✔-where QRS complex ends and ST segment begins


QT interval - Ans:✔✔-ventricular depolarization and repolarization varies with age, gender, and heart

rate




beginning of the QRS to the end of the T wave




QT must be corrected to a HR of 60 bpm


QTc - Ans:✔✔-corrected QT interval =


QT/(square root of R-R interval)




normalizes for HR


long QTc --> torsades, ventricular arrhythmia, Vfib


vertical axis - Ans:✔✔-each small box is 1mm or 0.1 mV




Page 3/87

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




each large box is 5mm or 0.5 mV


most common complication of ischemic heart disease and MI - Ans:✔✔-dysrhythmias


best leads for differentiating wide QRS rhythms - Ans:✔✔-v1 and v6


v1 and v6 - Ans:✔✔-helps to differentiate VTACH from SVT with aberrant intraventricular conduction




helps to recognize right and left bundle branch blocks




differentiates between right and left ventricular ectopy




differentiates between right and left ventricular pacing


v1 and v6 placement - Ans:✔✔-v1 - fourth intercostal space at the right sternal border




v6 - left midaxillary line at the v4 level (fifth intercostal space midclavicular line)


primary dysrhythmia monitoring lead - Ans:✔✔-V1



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