A Cryptic Cause of Cardiac Arrest

Area of Science:

• Medical Case Reports
• Genetics
• Pediatrics

Background:

• RIPPLY2-associated spondylocostal dysostosis is a rare genetic disorder characterized by vertebral segmentation defects.
• These defects can cause significant cervical spine instability, predisposing individuals to cardiac arrest following minor trauma.

Observation:

• A healthy 7-year-old experienced out-of-hospital cardiac arrest after a minor fall without apparent trauma.
• Cervical spine imaging revealed abnormalities consistent with spondylocostal dysostosis.
• The cardiac arrest was attributed to hypoxia and bradycardia secondary to whiplash-induced cervical spine injury.

Findings:

• The patient was diagnosed with spondylocostal dysostosis 6 (SCDO6), an autosomal recessive disorder caused by a RIPPLY2 gene mutation.
• Early recognition and cervical spine stabilization are crucial for preventing catastrophic outcomes in affected individuals.

Implications:

• Emergency physicians must consider rare genetic syndromes like SCDO6 in cases of unexplained cardiac arrest, especially in pediatric patients.
• Prompt cervical spine immobilization and evaluation are vital in patients presenting with cardiac arrest of unclear etiology.
• Awareness of RIPPLY2-associated spondylocostal dysostosis can improve diagnostic timeliness and preventative care, potentially averting fatal outcomes.