Torsade de pointes:
A) presents with wide QRS complexes that are all of the same shape, size, and vector direction.
B) is a lethal ventricular rhythm that is usually caused by ingestion or injection of CNS-depressant drugs.
C) is generally less serious than monomorphic ventricular tachycardia and is usually not treated in the field.
D) is a variant of polymorphic ventricular tachycardia and is often caused by a prolonged QT interval.
Answer: D) is a variant of polymorphic ventricular tachycardia and is often caused by a prolonged QT interval.
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