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N164 - Cardio Exam Questions And Answers
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N164 - Cardio Exam Questions And AnswersSA Node bpm range? - Answer 60-100 bpm
AV Node bpm range? - Answer 40-60 bpm
Purkinje fibers bpm range? - Answer 20-40bpm
The AV junction is formed by the AV node and the: - Answer Bundle of His
plateau phase - Answer many Ca2+ channels opened= Ca2+ influx that counteracts K+
exit
Torsades de pointes caused by - Answer hypomagnesia
QT length in hypocalcemia - Answer Hypocalcemia = SHORTENED QT
[ 0.33 - 0.43 ]
QT length in hypercalcemia? - Answer Hypercalcemia = PROLONGED QT
[ 0.33 - 0.43 ]
PR interval range - Answer [ 0.12- 0.2 seconds ]
(3-5 small boxes)
QRS complex - Answer [ 0.6 - 0.10 seconds ]
, J point represents? - Answer End of depolarization & beginning of repolarization
ST wave - Answer ventricular repolarization
Why the T wave is heightened? - Answer High potassium (K+) --> "sign off" --> VFib
VFib treatment - Answer insulin (regular) + dextrose
1 big box (on the EKG strip) = __ seconds - Answer 1 big box = 6 seconds
how to give IV atropine - Answer 0.5mg/ Q3-5min/ MAX 3mg
Bradycardia treatment - Answer IV atropine
Dopamine
Epi
Pacemaker
Causes of tachycardia - Answer tachycardia causes:
- HYPOtension, hypovolemia
- Epi/Norepi
- Hydralazine, theophylline
Tachycardia TX - Answer Tachycardia TX
- IVF
- beta-blockers, Ca-CH blockers
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