History of presentation
A 17-year-old male patient was transferred to our hospital due to a sudden collapse in the other hospital. The patient was found to suffer from frequent palpitation and light-headedness that eventually led to his collapse. At the previous hospital, the patient was well-oriented but still complained of a fast heart rate, which he pointed out had begun at least three days before. Different supraventricular tachycardias (Figure 1) were documented then, and aggressive medical treatment with three doses of adenosine (12 mg) was given to terminate the tachycardia. However, the supraventricular tachycardia (SVT) spontaneously re-initiated despite additional maintenance therapy with intravenous amiodarone.