National registries for rare clinical conditions: Networking to promote evidence-based healthcare Adelino F. Leite-Moreira, Francisca Saraiva

Pregnancy, the exception to the indexing of echocardiographic parameters? Tatiana Guimarães

Echocardiographic diagnosis of ruptured right sinus of Valsalva Bruno Bochard-Villanueva, Oscar Fabregat-Andrés, Jordi Estornell-Erill, Juan Martinez-Leon, José Leandro Pérez-Boscá, Rafael Payá-Serrano