Secondary mitral regurgitation: Maintaining coherence with the American Society of Echocardiography grading guidelines, which proportionality concept best predicts prognosis in the real world? João Presume; Pedro Lopes; Pedro Freitas; Francisco Albuquerque; Carla Reis; Eduarda Horta; Liliana Marta; Sara Guerreiro; Marisa Trabulo; João Abecasis; Pedro de Araújo Gonçalves; Manuel Almeida; Manuel Canada; Miguel Mendes; Maria João Andrade; Regina Ribeiras;