A 75-year-old man became unconscious while taking a bath and drowned. His family found him and called an ambulance, and he was transported to our department. On arrival, his consciousness had improved. The results of his physical examination and an electrocardiogram were negative for abnormalities. After starting to eat, he developed a high fever at greater than 39 degrees C, which was followed by pulseless ventricular tachycardia and ventricular fibrillation (Vf). Immediate coronary angiography showed no remarkable findings. After the reinitiation of tube feeding, he again developed a high fever, which was followed by Vf. When he maintained a normal body temperature or had a low-grade fever, the lethal arrhythmia did not occur. An electrophysiological study on the 62nd hospital day failed to induce the ventricular tachycardia or Vf.
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