Questions and 100% Correct Answers 2026 Update
Sinus Arrhythmia
Looks almost normal
Action: none, continue to monitor
First Drug: none
Possible cause: respiratory deviation, peds, aging heart
Sinus Bradycardia
Action: oxygen, notify MD - if symptomatic, follow AHA guidelines. First Drug: Atropine if
symptomatic - low BP
Possible cause: vagal-stimulation, athlete, sleep, ischemia to SA node, Meds, ↑ ICP
, Sinus Tachycardia
Action: Determine & Treat the cause - this is key
First Drug: None, watch for drugs that may be the cause
Possible causes: pain, fever, anxiety, exercise, hypoxia, caffeine, sympathetic stimulation.
Premature Atrial Contraction - PAC's
Action: no action needed; if new or frequent notify MD
First Drug: None
Possible causes: caffeine, fatigue, tobacco, alcohol, stress, atrial enlargement