Increased serum interleukin-6 level as a predictive biomarker for atrial fibrillation: A systematic review and meta-analysis Peng Zhou; Maieryemu Waresi; Yikai Zhao; Hung-Chen Lin; Bangwei Wu; Nanqing Xiong; Huiyang Li; Qingyu Huang; Xinping Luo; Jian Li;

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;