Children with Kawasaki disease are at increased risk of cardiovascular events...

Children with Kawasaki disease are at increased risk of cardiovascular events...
Children with Kawasaki disease are at increased risk of cardiovascular events...
Reviewed by Emily Henderson, B.Sc.6. November 2020

New research shows that children with Kawasaki disease more than 10 years after hospitalization are at increased risk of cardiovascular events due to their condition, underscoring the need for long-term heart disease monitoring and risk reduction strategies for these young patients. Details of the study were presented at ACR Convergence, the American College of Rheumatology’s annual meeting (ABSTRACT # 0937).

Kawasaki disease (KD) is a childhood disease in which blood vessels become inflamed (vasculitis) and swell. KD is most common in children under the age of five. However, older children can also be affected. The exact cause is unknown. Without immediate medical examination and treatment, serious damage to the blood vessels in the heart can occur. KD is associated with coronary artery aneurysms.

Researchers in Ontario, Canada found that the incidence of KD in their province has increased significantly over the past two decades. However, the risk of long-term cardiovascular events following a childhood diagnosis of KD is still unknown. They started this study to determine the risk and timing of long-term cardiovascular events and death in KD survivors.

The motivation to conduct this study came from a conversation with the family of a patient who was a pediatric resident in the first year. Her child was diagnosed with KD and was almost ready to be discharged from the hospital. They asked me if their child would be at risk for heart disease later in life. Not knowing the answer, I delved deeper into the published literature on cardiovascular outcomes after KD and found that there was a significant knowledge gap, especially in children who did not develop coronary artery aneurysms during their acute illness. It is very important that we better understand childhood cardiovascular risk after KD. Earlier diagnosis offers interventions that can reduce the risk of heart disease later in life. ”

Cal Robinson, MD, BSc, Study Co-Author, Pediatric Nephrology, Resident at the Hospital for Sick Children and the University of Toronto

The researchers used health databases to identify all children aged 18 and under who survived hospitalization for KD in Ontario between 1995 and 2018. They included only the first eligible hospital stay, excluding children previously diagnosed with KD and non-residents of Ontario. They compared every KD case according to age, gender and year with 100 non-exposed control cases. They then followed these patients until death or March 2019 or up to 24 years. They determined the frequency of cardiovascular events, serious adverse cardiac events (such as heart attack or stroke), and death, and compared children with KD with those who were not exposed to the disease. Specifically, they looked at four periods after discharge from the hospital: 0-1 years, 1-5 years, 5-10 years, and more than 10 years.

They found that among 4,597 KD survivors, 746, or 16.2%, experienced cardiovascular events, compared with 5.2% of children without the disease. They also found that 79 or 1.7% experienced serious cardiac adverse events compared with 0.7% of children without the disease, and nine died during the median 11-year follow-up. The most common cardiovascular events in KD survivors were ischemic heart disease, arrhythmias, hypertension, and peripheral vascular disease. KD survivors were at greater risk of heart problems than patients who did not have the disease and who had cardiovascular events earlier. Her risk was highest in the first year after she was released from hospital. They also had a higher risk of heart surgery such as coronary artery bypass grafts. However, their risk of death during follow-up was lower than in non-exposed patients.

“Our study results provide a signal that KD survivors have a higher risk of developing heart disease more than ten years after their initial diagnosis. This suggests that KD survivors should be screened for cardiovascular disease and associated risk factors at regular intervals, ”says Dr. Robinson. “Strategies to reduce cardiovascular risk should be implemented for all KD survivors, including healthy advice on active lifestyle and early intervention when cardiovascular risk factors are identified.”

Those:

American College of Rheumatology

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