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N164 – Cardio Exam Questions With 100% Verified Answers

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N164 – Cardio Exam Questions With 100% Verified Answers SA Node bpm range? - answer60-100 bpm AV Node bpm range? - answer40-60 bpm Purkinje fibers bpm range? - answer20-40bpm The AV junction is formed by the AV node and the: - answerBundle of His plateau phase - answermany Ca2+ channels ope...

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  • October 1, 2024
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  • 2024/2025
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N164 – Cardio Exam Questions With 100%
Verified Answers

SA 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

, ©BRAINBARTER 2024/2025


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
- SYNC cardioversion (w/ hypotension)

Supraventricular tachycardia - answer✔P wave: Abnormal/hidden
PR Interval: Shortened/normal
QRS: Normal
Rhythm: Normal
>151

how to give IV adenosine - answer✔1. Push 6mg (NOT by yourself)
2. Push 12mg


18G needle @AC
Half-life is 10-seconds

Premature Atrial Contraction (PAC) - answer✔P: Visible/hidden
PR Interval: Normal/longer
QRS: Normal
Rhythm: Irregular

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