Equity and representation in cardiology research: A comprehensive analysis of authorship from low and low-middle income countries in cardiology journals.

Cardiovascular disease is the leading cause of mortality, disproportionately affecting low-income and low-middle-income countries (LICs/LMICs). Despite this, cardiology research commonly comes from affluent regions. This study assessed the authorship trends from LICs/LMICs in cardiology journals listed in PubMed from 2000 to 2022. The World Bank list was used to classify countries. The total number of articles published in the 138 cardiology journals was 529,359. The percentage of articles that included at least one author affiliated with LICs/LMICs institutions was 0.11 % and 2.23 %, respectively. Over the last decade, there has been an increase in the author's representation from LICs/LMICs; however, it is uneven, with some countries experiencing more significant increases (Zambia, Yemen, and Uganda for LICs, and India, Iran, and Lebanon for LMICs). Our findings highlight the inequity of research publication and invite our community to reflect on the need to develop strategies to improve representation from LICs/LMICs.