HRCR Rare Diseases Article Collection
Masquerade: An unusual accessory pathway with ventricular insertion at the right–left sinus of Valsalva mimicking outflow tract ventricular tachycardia
Although rare, an accessory pathway (AP) can have a ventricular insertion in the region of the aortic sinuses of Valsalva.1–4 This can be difficult to diagnose and may resemble outflow tract ventricular tachycardia (VT).4 Despite the existence of various algorithms that can differentiate wide-complex supraventricular tachycardia (SVT) from VT, these conditions may be impossible to differentiate based on surface QRS morphology alone.5,6
