Paravalvular leak closure: Still a challenge with unpredictable results Ana Galrinho; Luísa M. Branco; António Fiarresga; Duarte Cacela; Lídia Sousa; Ruben Ramos; Rui C. Ferreira;

Left atrial appendage thrombus with severe mitral stenosis: Responders and non-responders to anticoagulation Tariq Ashraf; Kanwal Fatima Aamir; Asif Nadeem; Shirjeel Murtaza; Parveen Akhtar; Samra Yasmin Haque; Rahmat Ghaffar; Mahmood ul Hassan; Fateh Ali Tipoo;

Cardiopulmonary exercise testing in clinical practice: Principles, applications, and basic interpretation Hélder Dores; Miguel Mendes; Ana Abreu; Anaí Durazzo; Cidália Rodrigues; Eduardo Vilela; Gonçalo Cunha; José Gomes Pereira; Luísa Bento; Luís Moreno; Paulo Dinis; Sandra Amorim; Susana Clemente; Mário Santos;