ECG Weekly

Workout Quiz

5 questions. Answers are graded instantly with expert explanations.

  1. 1. A 55-year-old patient presents with severe dehydration, nausea, and vomiting. An ECG reveals significant QT prolongation primarily due to ST-segment prolongation with normal T-wave morphology. Which electrolyte abnormality most likely explains these findings?
  2. 2. Which of the following medications would NOT be recommended for the acute management of acquired QT prolongation associated with polymorphic ventricular tachycardia (Torsades de Pointes)?
  3. 3. You evaluate a severely dehydrated patient whose ECG demonstrates significant QT prolongation. To promptly determine if cardiac monitoring is necessary before lab results return, what QTc interval cutoff should prompt immediate concern?
  4. 4. In a patient presenting with recurrent episodes of polymorphic ventricular tachycardia (Torsades de Pointes) who does NOT respond to multiple boluses of magnesium sulfate, you should strongly suspect:
  5. 5. A patient with QT prolongation secondary to hypomagnesemia and hypokalemia develops polymorphic ventricular tachycardia. Which initial management step would be most appropriate?