Long-term consumption of a high-fat diet (HFD) causes macrophage infiltration in the myocardium, which begins to secrete cytokines involved in cardiac inflammation. In this regard, interleukin-1β (IL-1β) plays a key role. Elevated levels of IL-1β trigger mitochondrial production of reactive oxygen species (ROS). The burst of ROS in the myocardium contributes to the development of diastolic dysfunction and heart failure with preserved ejection fraction in an experimental HFD model. A current systematic review by Portes et al. has shown that […]

Cardiac remodeling due to exercise training overload (the so-called “athlete’s heart”) has been widely investigated since the 70’s and is still acknowledged by the scientific community. To differentiate normal adaptive responses (“benign”) from abnormal ones remains a challenge. Here we address some important issues related to the discussion on cardiac remodeling in exercise, recently revisited by Vidaletti-Silva and colleagues in this issue. In terms of morphological adaptations, the left atrial and ventricular hypertrophy call attention due to their potential association […]

Chronic Chagas disease (CCD) continues to be a major scourge for people living in South America and an emergent medical problem outside the American Continent because of world globalization. Chronic Chagas heart disease (CCHD) affects about 30% of patients with CCD, appearing 20-30 years after infection with Trypanosoma cruzi. Prognosis of CCD patients is relentless, with a 5-year mortality approaching 35%. CCHD patients have an outcome even worse, particularly those with ventricular and atrial remodeling, which manifests by chronic systolic […]