Chagas disease affects millions of individuals across Latin America and imposes a substantial economic burden on healthcare systems, particularly in rural and underserved regions. Chronic Chagasic cardiomyopathy remains one of the leading causes of heart failure-related mortality in endemic countries. Tissue inhibitor of metalloproteinases-1 (TIMP-1) has emerged as a potential biomarker of myocardial fibrosis in cardiomyopathies. This study was designed to investigate the association between TIMP-1 and myocardial fibrosis in chronic Chagas disease and to assess its potential as an early biomarker of fibrotic remodelling.

Bottom of form: The PTICH trial is a single-centre, prospective observational cohort study conducted at a government reference clinic in Pernambuco, Brazil. The study aims to enrol 210 adults with Chagas heart disease: 140 without ventricular dysfunction (left ventricular ejection fraction (LVEF) ≥52% in women and ≥54% in men) and 70 with ventricular dysfunction (LVEF

The Research Ethics Committee (REC) of Chagas disease and heart failure outpatient clinic—PROCAPE approved the PTICH trial (CAAE number: 65746322.8.1001.5192). Written informed consent has been obtained from all participants enrolled to date, and data handling is in compliance with applicable privacy and data protection regulations. Study findings will be disseminated through targeted outreach to civil society, the scientific community, healthcare professionals and Brazilian Unified Health System (SUS) policymakers; school-based science communication activities conducted in collaboration with state education departments (potentially including oral health educational materials); policy briefs and targeted reports for public health managers; technical meetings and institutional presentations; a plain-language summary published on the institutional website; and submissions to peer-reviewed journals and presentations at academic and health policy conferences.

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Qualitative research methods allow investigators to gain a detailed understanding of phenomena, based on the collection and analysis of rich data. An important element of some qualitative studies is key informants (KIs)—those are a specific set of participants who are able to provide particularly valuable viewpoints and insights on the issues or questions being examined.1 2

The concept of using KIs dates back to early anthropological studies, where researchers relied on local experts to help better understand cultural practices and social structures. Over time, this approach has evolved, with increasing recognition of the value that KIs bring to a wide array of fields, including public health, education, social sciences, medicine and nursing.3 This ‘Research Made Simple’ article explores what KIs are, how they can benefit nursing and healthcare research and what practical steps can be taken by researchers to optimise the...