What characteristic pattern is seen in torsades de pointes on an EKG?

What characteristic pattern is seen in torsades de pointes on an EKG?

• A. Ventricular complexes consistently point upwards
• B. Ventricular complexes show a twisting ribbon appearance
• C. Ventricular complexes appear as straight lines
• D. Ventricular complexes have irregular intervals

Answer: (B)

In torsades de pointes, the hallmark feature on an EKG is the appearance of a twisting ribbon effect. This characteristic pattern occurs due to the rapid and polymorphic nature of the ventricular tachycardia, resulting in a sinusoidal variation of the R waves that seem to twist around the baseline.

This twisting effect is indicative of the underlying abnormal repolarization processes affecting the myocardium, often triggered by factors such as prolonged QT interval or electrolyte imbalances. The distinctive morphology is essential for distinguishing torsades de pointes from other forms of ventricular tachycardia, enabling timely and appropriate clinical intervention. Understanding this unique pattern is crucial for health professionals interpreting EKGs, as it signifies a potentially life-threatening arrhythmia that requires immediate attention.