In the OPD7517 case, which of the following is listed as a borderline long QT syndrome finding?

• A. Ventricular tachycardia
• B. Atrial fibrillation
• C. Borderline long QT syndrome
• D. Sinus tachycardia

Answer: (C)

The concept here is recognizing how long QT syndrome findings are described. A finding labeled borderline long QT syndrome means the QT interval is at the upper edge of normal but not clearly prolonged, signaling a potential risk that requires attention but isn’t a definitive diagnosis of LQTS. In the OPD7517 case, the only option that fits this description is the one that uses the exact phrase “borderline long QT syndrome,” which is why it’s the best choice. The other options point to different rhythms or conditions (ventricular tachycardia, atrial fibrillation, sinus tachycardia) that do not describe a borderline QT issue. Understanding this helps you see why the case would specifically list borderline long QT syndrome as a finding, highlighting a risk level rather than a full-blown diagnostic state.