FREE EKG Certification MCQ Question and Answers Flashcards
6 cards from real EKG certification Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
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A patient's EKG shows a prolonged PR interval greater than 0.20 seconds with consistent P-to-QRS conduction. What is the most likely diagnosis?
Answer: First-degree AV block
A PR interval consistently greater than 0.20 seconds with every P wave followed by a QRS complex is the hallmark of first-degree AV block.
Which EKG finding is most characteristic of hyperkalemia?
Answer: Peaked T waves
Peaked, tall T waves are the earliest and most recognizable EKG manifestation of hyperkalemia.
What does the QRS complex represent on an EKG tracing?
Answer: Ventricular depolarization
The QRS complex represents the electrical depolarization of the right and left ventricles.
A rhythm strip shows irregularly irregular R-R intervals with no identifiable P waves. What is the most likely rhythm?
Answer: Atrial fibrillation
Atrial fibrillation is characterized by irregularly irregular R-R intervals and the absence of distinct P waves due to chaotic atrial activity.
In which lead grouping would you expect to see ST elevation during an anterior wall myocardial infarction?
Answer: V1-V4
Leads V1 through V4 overlie the anterior wall of the left ventricle and will show ST elevation during an anterior MI.
What is the normal duration of the QRS complex in a healthy adult?
Answer: 0.06 to 0.10 seconds
The normal QRS duration is 0.06 to 0.10 seconds, indicating rapid and synchronized ventricular depolarization.