echelon class Questions with Correct Answers

sinus bradycardia - Correct Answer--less than 60 beats per minute -P wave in front of every QRS -PR--0.12 to 0.20 -QRS less than 0.12 -if symptomatic--atropine, pacemaker sinus tachycardia - Correct Answer--treat underlying cause (fever, pain, etc.) Sinus Arrhythmia - Correct Answer-irregular with breathing--HR increases with inspiration and decreases with expiration -only treat if hemodynamically compromised--atropine SA block - Correct Answer--dropped interval/pause -if hemodynamically compromised--atropine, permanent pacemaker sinus arrest - Correct Answer-- SA node doesn't fire - notice absence of P-wave for a complete cycle (a missed cycle) -no treatment if episodes are transient otherwise temporary pacing or atropine Premature Atrial Contraction (PAC) - Correct Answer-if symptomatic--digitalis, beta blockers, antiarrhythmics atrial flutter - Correct Answer--Sawtooth pattern -250 to 350 beats