[Heart failure due to arteriovenous fistula for hemodialysis. Presentation of two clinical cases].

Arteriovenous fistulas for hemodialysis create a leftto-right shunt, resulting in an average 25% increase in cardiac output and subsequent remodeling of cardiac chambers. Some of these patients may develop highoutput heart failure. In this report, we present two cases of heart failure associated with an arteriovenous fistula for hemodialysis, each showing distinct clinical outcomes following either its occlusion or cerclage.

Analysis of long COVID in health personnel: comparing gender and work factors.

Introduction: This study aimed to describe the reported prevalence of post-COVID-19 syndrome and its characteristics by gender, profession, and other determinants among health care workers.

Methods: A cross-sectional study was conducted among health workers with a history of COVID-19 in Latin America, and the 2030 responses from Argentina were selected for this analysis. Sociodemographic information, as well as data on initial course of COVID-19, and the persistence of 21 symptoms beyond the first month, their severity, clinical evolution, and health care demands were collected.

Circulating microRNAs as biomarkers of Chagas cardiomyopathy.

Background: Chagas cardiomyopathy (CHCM) is the most important clinical manifestation of Chagas disease. The analysis of cardiac miRNAs may contribute to predicting the progression to CHCM in Chagas indeterminate phase and/or to the differential diagnosis for cardiomyopathy.

Methods: We carried out a case-control study to identify circulating miRNAs associated with CHCM.

Post COVID-19 syndrome. Severity and evolution in 4673 health care workers.

Background: The evolution of post COVID syndrome has been variable and we lack information on its impact on healthcare professionals, particularly in Latin America.

Methods: We conducted a survey through a social network in health professionals on post COVID-19 syndrome cases confirmed with PCR. In a web-based questionnaire, we asked about 21 symptoms, their severity, duration, degree of activity impairment and return to work.