Fatal arrythmia in a young man after COVID-19 vaccination: An autopsy report.

Rationale: The benefits of COVID-19 mRNA vaccination are claimed to be substantial; however, vaccination-related myocarditis and pericarditis have also been observed globally, particularly among young men. In most cases, the symptoms are mild and resolve on their own; however, fatal cases have rarely been described.

Patient Concerns: A healthy 40-year-old Japanese man suddenly experienced tachycardia and lost consciousness 2 days after vaccination.