CCRN AACN Exam Question And Answers
2025
atrial fibrillation adverse consequences - correct answers ✅✅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 - correct answers ✅✅-right side of the
interventricular septum and right ventricle
-impulse travels slower as the right ventricle is smaller/thinner
left bundle branch - correct answers ✅✅two main divisions:
anterior fascicle and posterior fascicle carrying impulses to the
left ventricle
PR interval - correct answers ✅✅delay of AV node to allow filling
of ventricles
QRS complex - correct answers ✅✅ventricular depolarization
shape depends on the lead that is being monitored and the
ventricular activation device
,CCRN AACN Exam Question And Answers
2025
T wave - correct answers ✅✅ventricular repolarization
normally in the same direction as the QRS
upright, flat, inverted
pathologies of T wave - correct answers ✅✅MI, E/L levels, drug
effect, myocardial disease, and lead being recorded
u wave - correct answers ✅✅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 - correct answers ✅✅early ventricular repolarization
should be at isoelectric line
J point - correct answers ✅✅where QRS complex ends and ST
segment begins
,CCRN AACN Exam Question And Answers
2025
QT interval - correct answers ✅✅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 - correct answers ✅✅corrected QT interval =
QT/(square root of R-R interval)
normalizes for HR
long QTc --> torsades, ventricular arrhythmia, Vfib
vertical axis - correct answers ✅✅each small box is 1mm or 0.1
mV
each large box is 5mm or 0.5 mV
most common complication of ischemic heart disease and MI -
correct answers ✅✅dysrhythmias
best leads for differentiating wide QRS rhythms - correct answers
✅✅v1 and v6
, CCRN AACN Exam Question And Answers
2025
v1 and v6 - correct answers ✅✅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 - correct answers ✅✅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 - correct answers ✅✅V1
what is lead II used for? - correct answers ✅✅used to identify
atrial activity if unclear in other leads or for visualization of R
waves during synchronized cardioversion
rhythms with a short PR interval - correct answers ✅✅may
indicate presence of accessory pathway
2025
atrial fibrillation adverse consequences - correct answers ✅✅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 - correct answers ✅✅-right side of the
interventricular septum and right ventricle
-impulse travels slower as the right ventricle is smaller/thinner
left bundle branch - correct answers ✅✅two main divisions:
anterior fascicle and posterior fascicle carrying impulses to the
left ventricle
PR interval - correct answers ✅✅delay of AV node to allow filling
of ventricles
QRS complex - correct answers ✅✅ventricular depolarization
shape depends on the lead that is being monitored and the
ventricular activation device
,CCRN AACN Exam Question And Answers
2025
T wave - correct answers ✅✅ventricular repolarization
normally in the same direction as the QRS
upright, flat, inverted
pathologies of T wave - correct answers ✅✅MI, E/L levels, drug
effect, myocardial disease, and lead being recorded
u wave - correct answers ✅✅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 - correct answers ✅✅early ventricular repolarization
should be at isoelectric line
J point - correct answers ✅✅where QRS complex ends and ST
segment begins
,CCRN AACN Exam Question And Answers
2025
QT interval - correct answers ✅✅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 - correct answers ✅✅corrected QT interval =
QT/(square root of R-R interval)
normalizes for HR
long QTc --> torsades, ventricular arrhythmia, Vfib
vertical axis - correct answers ✅✅each small box is 1mm or 0.1
mV
each large box is 5mm or 0.5 mV
most common complication of ischemic heart disease and MI -
correct answers ✅✅dysrhythmias
best leads for differentiating wide QRS rhythms - correct answers
✅✅v1 and v6
, CCRN AACN Exam Question And Answers
2025
v1 and v6 - correct answers ✅✅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 - correct answers ✅✅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 - correct answers ✅✅V1
what is lead II used for? - correct answers ✅✅used to identify
atrial activity if unclear in other leads or for visualization of R
waves during synchronized cardioversion
rhythms with a short PR interval - correct answers ✅✅may
indicate presence of accessory pathway
