2025/2026 WITH CORRECT DETAILED
ANSWERS || ALREADY GRADED A+
<RECENT VERSION>
Normal PR interval is less than how many small boxes - ANSWER less than 5
small boxes
Is a normal QRS complex wide or narrow? - ANSWER narrow
How long is a QRS complex in seconds - ANSWER 0.06 sec - 0.12 seconds
How many small boxes is a normal QRS complex - ANSWER 1.5 - 3 small
boxes
How to treat symptomatic bradycardia - ANSWER atropine, transcutaneous
pacing, dopamine, epinephrine
How to treat non-symptomatic bradycardia - ANSWER monitor and observe
,Expected atrial rate of atrial fibrillation - ANSWER 350-400 bpm
If arrhythmia is non-symptomatic and new: - ANSWER 1. ID and treat the
underlying cause
2. Confirm arrhythmia (check lead placement, obtain EKG)
3. notify MD
4. administer antiarrhythmic medications
Treatment for symptomatic tachycardia - ANSWER synchronized cardioversion
The PR interval of a PAC is how long - ANSWER 0.12 - 0.2 seconds
Tachycardia treatment medications - ANSWER adenosine, amiodarone,
procainamide, sotalol
Vfib and V tach treatment - ANSWER 1. Start CPR and see if there is a
shockable rhythm
What are the shockable rhythms - ANSWER ventricular fibrillation
pulseless ventricular tachycardia
What is the pulseless Vtach and Vfib medication - ANSWER 1. epinephrine 1
mg every 3-5 min
2. amiodarone first dose 300 mg bolus, second dose 150 mg
,Asystole and PEA medications - ANSWER epinephrine 1 mg every 3-5 min
How to treat symptomatic tachycardia - ANSWER synchronized cardioversion
How to treat non-symptomatic and regular tachycardia - ANSWER vagal
maneuvers, adenosine, β-blockers or Ca channel blockers, expert consultation
How to treat non-symptomatic and wide tachycardia - ANSWER adenosine if
[regular and monomorphic], antiarrhythmic infusion, expert consultation
The ability of muscle cells to respond to outside stimulus -
ANSWER excitability
The ability to receive an electrical stimulus and conduct that impulse to adjacent
cells, all cardiac cells possess this - ANSWER conductivity
The process where cardiac cells shorten, causing muscular contraction in response
to an electrical stimulus - ANSWER contraction
ventricular repolarization - ANSWER T wave
rate of atrial fibrillation - ANSWER 350-400 bpm
, What two electrolyte imbalances may cause ventricular tachycardia -
ANSWER hypokalemia
hypomagnesemia
What electrolyte abnormality may cause sinus bradycardia -
ANSWER hyperkalemia
increased intracranial pressure may cause what heart rhythm - ANSWER sinus
brady
If we have too long a ventricular repolarization, this may lead to -
ANSWER Vtach and Vfib
Ventricular repolarization is represented by - ANSWER T wave
Ventricular depolarization is represented by - ANSWER qrs complex
To measure the QT interval, you measure what - ANSWER the initiation of the
QRS to the end of the T wave
Where do you look on the ekg to see if there are abnormalities in ventricular
repolarization - ANSWER QT interval
QT interval that is too long represents - ANSWER delay in ventricular
repolarization