Evaluation of myocardial performance index in patients with COVID-19: An echocardiographic follow-up study Hakan Kaya; Ramazan Asoglu; Abdulmecit Afsin; Hakan Tibilli; Ercan Kurt; Safiye Kafadar; Umut Gulacti; Huseyin Kafadar;

Cardiac arrhythmias in patients presenting with COVID-19 treated in Portuguese hospitals: A national registry from the Portuguese Association of Arrhythmology, Pacing and Electrophysiology Dinis Mesquita; Pedro Carmo; Nuno Cabanelas; Nuno Santos; Vítor Martins; Victor Sanfins; Helena Cristina Costa; José Paulo Fontes; Paulo Fonseca; Leonor Parreira;

One-year recurrence rate of new-onset atrial fibrillation after acute myocardial infarction Alicia Prieto-Lobato; Víctor Hidalgo Olivares; Manuel Gerónimo Pardo; Marta Cubells Pastor; Francisco Manuel Salmerón Martínez; Miguel José Corbí-Pascual;