Protocol-based cardiotoxicity monitoring in hydroxychloroquine medicated COVID-19 pediatric patients Inês Hormigo; Tiago Milheiro Silva; Sérgio Laranjo; Conceição Trigo; Ana Margarida Garcia; Catarina Gouveia; Maria João Brito;

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;

Percutaneous patent ductus arteriosus closure: Twelve years of experience João Antunes Sarmento; Ana Correia-Costa; Edite Gonçalves; Maria João Baptista; João Carlos Silva; Jorge Moreira;