EKG Arrhythmias & Dysrhythmias 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.
Read the first 6 EKG Arrhythmias & Dysrhythmias flashcards as text
An EKG shows a regular wide-complex rhythm at 35 bpm with no relationship between P waves and QRS complexes. What is the correct interpretation?
Answer: Third-degree (complete) heart block with ventricular escape rhythm
Complete AV dissociation with a slow wide-complex ventricular escape rhythm at 35 bpm indicates third-degree heart block.
Which arrhythmia is most commonly associated with a prolonged QT interval on the preceding baseline EKG?
Answer: Torsades de Pointes
Torsades de Pointes is a polymorphic ventricular tachycardia that characteristically occurs in the setting of a prolonged QT interval.
A patient's EKG reveals three or more different P-wave morphologies with varying PR intervals and an irregular ventricular rate. What is the diagnosis?
Answer: Multifocal atrial tachycardia
Three or more distinct P-wave morphologies with varying PR intervals and an irregular rate above 100 bpm define multifocal atrial tachycardia.
During continuous monitoring, you observe a sudden onset of regular narrow-complex tachycardia at 170 bpm that terminates abruptly with a vagal maneuver. What is the most likely rhythm?
Answer: AV nodal reentrant tachycardia (AVNRT)
Sudden onset and termination with vagal maneuvers in a regular narrow-complex tachycardia is classic for AVNRT, the most common paroxysmal SVT.
What is the significance of capture beats and fusion beats seen during a wide-complex tachycardia?
Answer: They confirm the rhythm is ventricular tachycardia
Capture and fusion beats during a wide-complex tachycardia confirm a ventricular origin because they prove the atria and ventricles are being activated independently.
An EKG shows a short PR interval, delta waves, and a wide QRS complex in an asymptomatic patient. Which condition does this pattern indicate?
Answer: Wolff-Parkinson-White syndrome
A short PR interval with delta waves and widened QRS complex is the classic triad of Wolff-Parkinson-White syndrome caused by an accessory pathway.