Endomyocardial fibrosis: A restrictive cardiomyopathy in developing countries

Abstract

Objective: Endomyocardial fibrosis (EF) is an unusual restrictive cardiomyopathy. In Latin America there are few reports.Here, we made a description of patients diagnosed with EF in Colombia. Method: We conducted a search in the records of cardiac magnetic resonance imaging (MRI) performed in our institution between 2016-2019 looking for patients with a diagnosis of EF; sociodemographic, clinical and imaging characteristics were described. Results: Nine patients were diagnosed with EF (66.7% female), with an average age of 69 years. Patients presented an average evolution of 2.6 years. The main reported symptom was dyspnea, followed by syncope, chest pain, and palpitations. None of them was initially suspected for EF. Regarding echocardiographic findings, predominant left ventricular involvement was identified, followed by bi-ventricular involvement. All the patients presented a restrictive filling pattern with severe left atrial dilation. In a retrospective analysis, Mocumbi criteria for diagnosis of EF were met in 100% of the patients, majority with moderate severity (77.8%). Cardiac MRI showed biventricular systolic function and volumes preserved. Focal subendocardial late gadolinium enhancement was observed on the apex and apical thrombus was confirmed in 66% of the patients. Conclusion: FE is an uncommon restrictive cardiomyopathy limited to tropical countries. Most of patients in our series presented isolated involvement of left ventricle, followed by bi-ventricular involvement, with ventricular function usually preserved.