Sudden death caused by coronary artery aneurysms: a late complication of Kawasaki disease
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F S Wreford1, S E Conradi, S D Cohle
1Blodgett Memorial Medical Center, Grand Rapids, MI.
Insights
Sudden death can occur years after Kawasaki disease (mucocutaneous lymph node syndrome) due to persistent coronary artery aneurysms. These aneurysms, causing narrowed arteries, pose a long-term risk even after the initial illness resolves.
Area of Science:
- Cardiovascular Pathology
- Pediatric Cardiology
- Rheumatology
Background:
- Kawasaki disease (KD), also known as mucocutaneous lymph node syndrome, is an acute febrile illness primarily affecting young children.
- While typically self-limiting, KD can lead to significant cardiovascular sequelae, most notably coronary artery aneurysms.
- Fatal outcomes are most common within the first six months post-diagnosis, but late-onset complications are recognized.
Observation:
- This report details three cases of sudden, unexpected death attributed to late complications of KD.
- Autopsies revealed multiple coronary artery aneurysms with severe luminal stenosis.
- Pathological findings included intimal hyperplasia and thrombus formation within the aneurysms, significantly impeding blood flow.
Findings:
- The deaths occurred years after the acute phase of Kawasaki disease, highlighting the chronic nature of its vascular complications.
- Coronary artery aneurysms resulting from KD can persist for extended periods, potentially leading to fatal events.
- These late complications underscore the importance of long-term cardiovascular monitoring in KD survivors.
Implications:
- Long-term cardiovascular surveillance is crucial for individuals with a history of Kawasaki disease, even in the absence of acute symptoms.
- Understanding the persistent risk of coronary artery aneurysms is vital for clinical management and patient counseling.
- Further research into the mechanisms of aneurysm persistence and late thrombotic events in KD is warranted to improve patient outcomes.
Abstract:
The authors describe three cases (two blacks and one Latin American) of sudden death caused by late complications of Kawasaki disease (mucocutaneous lymph node syndrome). At autopsy each heart contained multiple coronary artery aneurysms with luminal stenosis caused by intimal hyperplasia and thrombi. Although virtually all fatal cases of Kawasaki disease occur within six months of the onset of symptoms, there have been other reported deaths up to 14 years after the acute illness. The coronary artery aneurysms of Kawasaki disease may persist and cause death years after the acute illness.