Introduction:
The most common comorbidities in children with congenital heart disease (CHD) are neurodevelopmental and psychosocial impairments, particularly in areas of executive function, memory, attention, and behavioral control. Limited studies in the adult CHD population suggest similar impairments exist and adults with CHD may be at increased risk for dementia. No studies have screened specifically for mild cognitive impairment and dementia in adult CHD patients.
Methods:
We performed a prospective cross-sectional study of adult CHD patients, ages 30-65 years, who were coming for routine clinic visits. We administered the Mini-Mental State Exam (MMSE) and scores were compared with population norms adjusted by age and education level. We also evaluated the association of MMSE scores with CHD complexity, demographic and clinical risk factors.
Results:
A total of 125 patients were recruited (55% male). The median age was 40 years (range 30-65). Almost all participants (97%) had a high school degree and 75% had some college education or advanced degrees. The majority of patients (94%) had moderate or complex CHD. Adjusting for age and education, CHD participants scored significantly lower than the general population (median 1 point lower, p=0.001). The greatest impairments occurred in recall and orientation. Factors associated with lower scores included decreased systemic ventricular function (p=0.028) and having ≥2 cardiac catheterizations (p=0.006). Five percent of the total cohort met the general threshold for mild cognitive impairment (MMSE<24). Clinical factors associated with this degree of cognitive impairment were duration of cyanosis (p=0.005) and decreased systemic ventricular function (p=0.003).
Conclusions:
Our pilot study showed that, when adjusted for age and education level, adult CHD patients had significantly lower MMSE scores than the general population, with 5% meeting criteria for mild cognitive impairment. These findings suggest that subtle and early neurodevelopmental changes are present in the adult CHD population. Further studies are needed to investigate those changes and evaluate potential disease modifying therapies that might influence long-term outcomes in the adult CHD population.
Pilot study of factors associated with exacerbations in chronic bronchitis