4.7 of 7 Ratings
A 28-year-old woman presents to the urgent care center complaining of weakness, confusion, and that her heart is "racing and flopping" in her chest. She has no significant past medical history. She denies any previous episodes of anxiety attacks or heart issues. She smokes 1/2 of a pack of cigarettes per day and is a social drinker. She denies the use of any illicit drugs. She has no known drug allergies, and she does not take any medications on a daily basis. An EKG is ordered and is shown in Figure A. This patient's ventricular contraction rate is determined by which of the following?
SA node refractory period
AV node refractory period
Bundle of His conduction speed
Purkinje fiber conduction speed
Purkinje fiber refractory period
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A 60-year-old male presents with palpitations. He reports drinking many glasses of wine over several hours at a family wedding the previous evening. An EKG reveals absent P waves and irregularly irregular rhythm. He does not take any medications. Which is most likely responsible for the patient’s symptoms?
Transmural myocardial infarction
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