Comprehensive Pathologic and Genetic Investigation of Four Young Adults with a Short QT Interval and Sudden Unexpected Death

Although structural heart abnormalities are not typically associated with short QT syndrome (SQTS)-related sudden unexpected death, few autopsy studies have examined the underlying pathology and genetic factors of SQTS. Therefore, comprehensive pathologic examinations and whole-exome sequencing were conducted in four men (aged 24, 28, 31, and 45 years) with sudden unexpected death and a short QT interval (sQT). No variants were identified in genes currently known to be associated with SQTS. An enrichment analysis was performed to identify potential genetic causes and mechanisms.