Wolff-Parkinson-White

The chief concern of a 17-year-old female patient who had experienced an episode of palpitations of supraventricular tachycardia (SVT) two months prior was palpitations while at rest. Initial vital signs showed a 200bpm heart rate, 97/63 mm Hg blood pressure, 18 breaths per minute (bpm), and 95% oxygen saturation in ambient air. SVT was verified by an ECG (Figure 1). Repeat ECGs after adenosine therapy effectively converted to sinus rhythm (Figure 2). However, this ECG showed Wolff-Parkinson-White (WPW) shape with a 100-millisecond PR interval, a delta wave, and a moderately prolonged QRS (117 milliseconds). The patient said that her symptoms had subsided, and her vital signs had returned to normal.