EXAM 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◉ Sinus Bradycardia. Answer: Rate: <60
Rhythm: reg
P wave: upright, married to QRS
PR: 0.12-0.20
QRS: <0.12
TX: Atropine (no more than 3mg), O2
◉ Sinus Tachycardia. Answer: Rate: >100
Rhythm: reg
P wave: upright, married to QRS
PR: 0.12-0.20
QRS: <0.12
TX: Beta blockers, underlying cause
◉ Sinus Arrhythmia. Answer: Rate: varies
Rhythm: irregular
, P wave: upright, married to QRS
PR: 0.12-0.20
QRS: <0.12
TX: none
◉ Sinus Arrest. Answer: Rate: any
Rhythm: regular but interrupted w/ pause
P wave: normal before pause, different after
PR: 0.12-0.20
QRS: <0.12
TX: Atropine if symptomatic
◉ Sinus Block. Answer: Rate: any
Rhythm: reg by interrupted w/ pause
P wave: upright, married to QRS, pause is multiple of R-R
PR: 0.12-0.20
QRS: <0.12
TX: Atropine
◉ Premature Atrial Contractions (PACs). Answer: Rate: any
Rhythm: reg but interrupted by premature beats
P wave: shaped differently