Relationship between emotional states before cardiac valve surgeries with postoperative complications - Rodrigues, Helen Francine; Furuya, Rejane Kiyomi; Dantas, Rosana Aparecida Spadoti; Morelato, Rafaela Dias Coloni; Dessotte, Carina Aparecida Marosti (Revista Gaúcha de Enfermagem, 2020)