I47.21

HCC Category Mapping

What This Code Means

Torsades de pointes is a dangerous type of irregular heartbeat where the heart's electrical signals become severely disrupted, causing the heart to beat in a twisting pattern that can be life-threatening. This condition can lead to fainting, loss of consciousness, or sudden cardiac arrest.

Coding Tips

• •This code represents a specific type of ventricular tachycardia and should be used when documentation explicitly identifies torsades de pointes rather than general ventricular tachycardia
• •Always investigate and document the underlying cause (such as medication side effects, electrolyte imbalances, or long QT syndrome) as this may require additional coding and is critical for treatment decisions

Clinical Significance

Torsades de pointes is a distinctive form of polymorphic ventricular tachycardia associated with prolonged QT interval that creates a characteristic 'twisting of the points' pattern on electrocardiogram. It is often triggered by medications, electrolyte imbalances, or congenital long QT syndrome. Without treatment, it can degenerate into ventricular fibrillation and sudden death.

Documentation Requirements

• ✓Provider diagnosis of torsades de pointes specifically documented
• ✓Electrocardiogram showing characteristic twisting pattern of ventricular tachycardia
• ✓Prolonged QT interval documented (corrected QT greater than 500 ms)
• ✓Underlying cause identified (medications, hypokalemia, hypomagnesemia, congenital long QT syndrome)
• ✓Treatment administered (intravenous magnesium, temporary pacing, offending agent withdrawal)

Commonly Confused Codes