HOAG ECG EXAMS SCRIPT UPDATED QUESTIONS AND
ANSWERS GRADED A+
✔✔Idioventricular shape and rate - ✔✔wide, irregular QRS with prolonged intervals
slow rate
no P waves
✔✔Asystole/ventricular standstill - ✔✔absence of electrical activity in ventricles
flat line or only P waves
✔✔1st degree heart block definition - ✔✔prolonged PR interval greater than 0.20
seconds
✔✔2nd degree heart block type 1 - ✔✔progressive lengthening of PR interval, until a
QRS is dropped. groups of the same pattern
✔✔2nd degree T1 characteristics - ✔✔
✔✔2nd degree T1 characteristics - ✔✔normal rate
RR interval irregular from dropped QRS's
✔✔2nd degree heart block type 2 - ✔✔grouped beating of ECG complexes, then a
pause with no QRSs
✔✔3rd degree heart block - ✔✔aka complete heart block
AV dissociation
✔✔3rd degree characterstics - ✔✔regular independent P waves at 60-100 bpm
regular independent QRS at 20-40 bpm
waves "march" regularly down the baseline, no association between the P waves and
QRSs
✔✔2nd degree type 2 characteristics - ✔✔irregular from dropped QRSs
fixed PR interval on the ones that aren't dropped
✔✔QT monitoring remains.. - ✔✔ON for all patients unless the RN tells the TCC it
should be turned off
✔✔Normal QT interval and adjusted for... - ✔✔0.36-0.44
adjusted for gender and HR
✔✔what is the QT high limit - ✔✔500ms
✔✔QT definition - ✔✔total duration of depolarization and repolarization phases
, ✔✔why is the QT interval important - ✔✔a prolonged QT may lead to ventricular
dysrhythmias
✔✔What medications can prolong the QT interval - ✔✔Tikosyn
amiodarone
haldol
✔✔explain the relationship between QT and HR - ✔✔inverse. the higher the HR, the
shorter the QT interval
✔✔why is Bazetts formula used - ✔✔determines the QTc which is the QT corrected for
HR
✔✔QT alarm - ✔✔uncorrected QT
✔✔QTc alarm - ✔✔corrected QT
✔✔QTc HR alarm - ✔✔the HR used to calculate QTc
✔✔dQTc alarm - ✔✔delta QTC or the change in QTc from baseline
✔✔CANNOT ANALYZE QT alarm - ✔✔monitor will say this if QT morphology is too
varied to get an accurate measurement
✔✔Reasons to discontinue QT monitoring - ✔✔1. very flat T wave
2. atrial flutter or fibrillation where T wave may not be well defined
3. U waves obscuring the end of T waves
4. Tachycardia where P wave encroaches on the end of previous T wave
5. Noise or high QRS morphology variation
6. Physician order
✔✔SpO2 definition - ✔✔percentage of hemoglobin molecules in the arterial blood which
are saturated with oxygen
✔✔normal spO2 - ✔✔94-100%
✔✔how does spO2 work - ✔✔light emitting diodes shine red and infrared light through
the tissue
the blood, tissue, and bone absorbs much of the light but some passes through
extremity
light sensitive detector receives it
✔✔good places for spO2 sensor to work - ✔✔finger, toe and ear
ANSWERS GRADED A+
✔✔Idioventricular shape and rate - ✔✔wide, irregular QRS with prolonged intervals
slow rate
no P waves
✔✔Asystole/ventricular standstill - ✔✔absence of electrical activity in ventricles
flat line or only P waves
✔✔1st degree heart block definition - ✔✔prolonged PR interval greater than 0.20
seconds
✔✔2nd degree heart block type 1 - ✔✔progressive lengthening of PR interval, until a
QRS is dropped. groups of the same pattern
✔✔2nd degree T1 characteristics - ✔✔
✔✔2nd degree T1 characteristics - ✔✔normal rate
RR interval irregular from dropped QRS's
✔✔2nd degree heart block type 2 - ✔✔grouped beating of ECG complexes, then a
pause with no QRSs
✔✔3rd degree heart block - ✔✔aka complete heart block
AV dissociation
✔✔3rd degree characterstics - ✔✔regular independent P waves at 60-100 bpm
regular independent QRS at 20-40 bpm
waves "march" regularly down the baseline, no association between the P waves and
QRSs
✔✔2nd degree type 2 characteristics - ✔✔irregular from dropped QRSs
fixed PR interval on the ones that aren't dropped
✔✔QT monitoring remains.. - ✔✔ON for all patients unless the RN tells the TCC it
should be turned off
✔✔Normal QT interval and adjusted for... - ✔✔0.36-0.44
adjusted for gender and HR
✔✔what is the QT high limit - ✔✔500ms
✔✔QT definition - ✔✔total duration of depolarization and repolarization phases
, ✔✔why is the QT interval important - ✔✔a prolonged QT may lead to ventricular
dysrhythmias
✔✔What medications can prolong the QT interval - ✔✔Tikosyn
amiodarone
haldol
✔✔explain the relationship between QT and HR - ✔✔inverse. the higher the HR, the
shorter the QT interval
✔✔why is Bazetts formula used - ✔✔determines the QTc which is the QT corrected for
HR
✔✔QT alarm - ✔✔uncorrected QT
✔✔QTc alarm - ✔✔corrected QT
✔✔QTc HR alarm - ✔✔the HR used to calculate QTc
✔✔dQTc alarm - ✔✔delta QTC or the change in QTc from baseline
✔✔CANNOT ANALYZE QT alarm - ✔✔monitor will say this if QT morphology is too
varied to get an accurate measurement
✔✔Reasons to discontinue QT monitoring - ✔✔1. very flat T wave
2. atrial flutter or fibrillation where T wave may not be well defined
3. U waves obscuring the end of T waves
4. Tachycardia where P wave encroaches on the end of previous T wave
5. Noise or high QRS morphology variation
6. Physician order
✔✔SpO2 definition - ✔✔percentage of hemoglobin molecules in the arterial blood which
are saturated with oxygen
✔✔normal spO2 - ✔✔94-100%
✔✔how does spO2 work - ✔✔light emitting diodes shine red and infrared light through
the tissue
the blood, tissue, and bone absorbs much of the light but some passes through
extremity
light sensitive detector receives it
✔✔good places for spO2 sensor to work - ✔✔finger, toe and ear
