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Video Analyses of Sudden Unexplained Deaths in Toddlers
Laura Gould1, Codi-Ann Reid1, Alcibiades J Rodriguez1
1From the NYU Grossman School of Medicine (L.G., C.-A.R., A.J.R., O.D.), and NYU Comprehensive Epilepsy Center (L.G., C.-A.R., A.J.R., O.D.), New York.
Insights
Sudden unexplained deaths in toddlers may be caused by convulsive seizures, not cardiac issues. Video analysis of 7 cases revealed terminal convulsive events, suggesting seizures as a likely mechanism for these sleep-related infant deaths.
Area of Science:
- Pediatric Pathology
- Neurology
- Forensic Medicine
Background:
- Over 2,900 US children under 4 die annually from unknown causes, representing over 219,000 life years lost.
- These sleep-related, unwitnessed deaths often have unremarkable autopsies, hindering understanding of their mechanisms.
- Current understanding of sudden unexplained child deaths is limited, necessitating novel investigative approaches.
Purpose of the Study:
- To investigate potential mechanisms of sudden unexplained death in toddlers.
- To evaluate home video recordings of children's sleep periods in cases of sudden death.
Main Methods:
- Seven cases with home video recordings from a registry of 301 sudden unexplained child deaths were analyzed.
- Eight physicians independently assessed video quality, movement, and sound.
- Cases were analyzed for terminal events, including convulsive activity, and cardiac pathology.
Main Results:
- Five continuous video recordings showed terminal convulsive events lasting 8-50 seconds; 4 children survived over 2.5 minutes post-convulsion.
- One discontinuous video suggested a convulsive event; six children were found prone with face down.
- No evidence of primary cardiac arrhythmias was found; all 7 children had normal cardiac pathology and no identified cardiac disease variants.
Conclusions:
- Audio-visual recordings strongly implicate convulsive seizures as the cause of death in these 7 toddlers.
- Findings suggest that seizures may be an underrecognized cause of many unexplained sleep-related infant deaths.
- This study highlights the utility of video recordings in elucidating mechanisms of sudden unexplained child death.
Background And Objectives:
More than 2,900 US children aged younger than 4 years die from unknown causes each year, accounting for more than 219,000 life years lost annually. They are mostly sleep-related and unwitnessed with unremarkable autopsies, limiting our understanding of death mechanisms. We sought to understand potential mechanisms of death by evaluating videos of sudden deaths in toddlers.
Methods:
In our registry of 301 sudden unexplained child deaths, a series of 7 consecutively enrolled cases with home video recordings of the child's last sleep period were independently assessed by 8 physicians for video quality, movement, and sound.
Results:
Four boys and 3 girls (13-27 months at death) with terminal videos shared similar demographic features to the 293 other registry cases without video recordings. Five video recordings were continuous and 2 were triggered by sound or motion. Two lacked audio. All continuous recordings included a terminal convulsive event lasting 8-50 seconds; 4 children survived for >2.5 minutes postconvulsion. Among discontinuous videos, time lapses limited review; 1 suggested a convulsive event. Six were prone with face down, and 1 had autopsy evidence of airway obstruction. Primary cardiac arrhythmias were not supported; all 7 children had normal cardiac pathology and whole-exome sequencing identified no known cardiac disease variants.
Discussion:
Audio-visual recordings in 7 toddlers with unexplained sudden deaths strongly implicate that deaths were related to convulsive seizures, suggesting that many unexplained sleep-related deaths may result from seizures.
