A 24-year-old man with history of unspecified arrhythmia presented with palpitations and chest pain. Initial electrocardiogram (ECG) revealed irregular tachycardia with varying QRS width: 150 to 200 beats per minute for narrow complexes and 300 beats per minute for wide complexes. Following cardioversion. ECG revealed sinus tachycardia with a preexcitation pattern of positive delta wa... https://www.ngetikin.com/amazing-find-Bolia-Loop-Rug-limited-choice/