Prevalence of rheumatic heart disease in South Asia: A systematic review and meta-analysis

Most countries in South Asia are endemic for rheumatic heart disease (RHD). We aimed to estimate the pooled prevalence of RHD in South Asia from population-based screening studies.

A systematic strategy was developed and used to search online databases for articles which described the prevalence of RHD in the South Asia region. Articles published in the English language between 1991 and 2021 were included in the review after fulfilling eligibility criteria.

The pooled prevalence of RHD in South Asia was 2.79 per 1000 (95% Confidence interval (CI): 1.30-4.83) according to studies using auscultation followed by echocardiography of suspected cases and 18.28 per 1000 (95% CI: 11.59-26.44) for studies using echocardiography screening of all participants. The highest prevalence of 8.0 per 1000 (95% CI: 0.71-22.74) was observed in Pakistan, whereas the lowest prevalence of 0.32 per 1000 (95% CI: 0.18-0.48) was observed in Bangladesh. The prevalence of RHD has decreased to 2.30 per 1000 from 3.06 per 1000 by 24.84% in 30 years (1991-2021). The prevalence is more than twice higher using WHF criteria compared to WHO criteria. We observed no sex-related differences in prevalence (p = 0.16).

The prevalence of RHD is still high in the South Asian population. Recent studies utilizing echocardiographic screening have identified subclinical cases of RHD, reflecting the significant burden of the disease in this region. More population-based echocardiography screening studies in every country in South Asia are required to estimate the accurate prevalence of the disease.