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;

Prognostic impact of iron deficiency in acute coronary syndromes Carina Silva; Juliana Martins; Isabel Campos; Carina Arantes; Carlos Galvão Braga; Nuno Salomé; António Gaspar; Pedro Azevedo; Miguel Álvares Pereira; Jorge Marques; Catarina Vieira;

Heart and brain interactions in heart failure: Cognition, depression, anxiety, and related outcomes Joana Rigueira; João R. Agostinho; Inês Aguiar-Ricardo; Inês Gonçalves; Rafael Santos; Afonso Nunes-Ferreira; Tiago Rodrigues; Nelson Cunha; N¿Zinga André; Raquel Pires; Fátima Veiga; Mónica Mendes Pedro; Fausto J. Pinto; Dulce Brito;