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Increasing detection of rheumatic heart disease with echocardiography
1All India Institute of Medical Sciences, New Delhi, India.
Insights
Echocardiography detects rheumatic heart disease (RHD) 10 times more often than auscultation. Early RHD diagnosis via echocardiography may improve outcomes, but further research is needed on minor changes and treatment effectiveness.
Area of Science:
- Cardiology
- Public Health
- Medical Diagnostics
Background:
- Rheumatic heart disease (RHD) affects over 20 million globally, predominantly in developing nations.
- The World Health Organization (WHO) has recommended RHD screening since 2004.
- Conventional diagnosis relies on auscultation, which may miss mild RHD cases.
Purpose of the Study:
- To evaluate the prevalence and diagnostic capabilities of echocardiography for RHD.
- To compare echocardiography findings with conventional auscultation methods.
- To address concerns regarding the significance and management of echocardiographically detected RHD.
Main Methods:
- Review of studies reporting echocardiographic screening for RHD.
- Comparison of RHD prevalence identified by echocardiography versus auscultation.
- Analysis of the potential benefits of early diagnosis and secondary prophylaxis.
Main Results:
- Echocardiography reveals an approximately 10-fold higher prevalence of RHD compared to auscultation.
- Echocardiography identifies mild RHD cases missed by auscultation.
- Early diagnosis may be crucial for secondary prophylaxis effectiveness.
Conclusions:
- Echocardiography offers a more sensitive method for RHD detection than auscultation.
- Further long-term studies are required to understand the natural history of minor echocardiographic findings.
- The efficacy of secondary prophylaxis in reversing minor valvular changes needs further investigation.
Abstract:
Rheumatic heart disease (RHD) is estimated to affect over 20 million people worldwide, the vast majority being in developing countries. Screening for RHD has been recommended by the WHO since 2004. Conventionally, auscultation has been used for diagnosing RHD. Auscultation has its limitation and may not detect mild cases. A large number of studies have reported echocardiographic screening for RHD over the last several years. Most of these studies report an almost 10-fold higher prevalence of RHD by echocardiography as compared to conventional method of auscultation. Early diagnosis of such mild cases may be important as instituting secondary prophylaxis in such cases may reduce the burden of the disease. However, several concerns remain about the significance and natural history of these minor valvular changes detected by echocardiography. Whether secondary prophylaxis will reverse these abnormalities is also unclear. Long term follow up studies are required to answer some of these concerns.
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