Sudden Cardiac Death: The Most Feared but Potentially Preventable Presentation of Wolff-Parkinson-White Syndrome

Figure 2

Twelve-lead electrocardiogram showing atrial fibrillation with a rapid preexcited ventricular response. Irregular RR intervals, wide QRS complexes with varying QRS width, and initial delta wave (arrow). The shortest preexcited RR interval is nearly 300 ms.