1. Postgraduate Program in Cardiology and Cardiovascular Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Cardiovascular Surgery Department, Hospital São Lucas da Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil; University Hospital of Zurich, University of Zurich, Cardiac Surgery Department, Zurich, Switzerland
2. Postgraduate Program in Cardiology and Cardiovascular Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Hospital Nossa Senhora da Conceição, Porto Alegre, Brazil; Centro Cardiologico Monzino, Heart Rhythm Center, Milan, Italy
3. Cardiovascular Surgery Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
4. Cardiovascular Surgery Department, Hospital São Lucas da Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil
5. Cardiovascular Surgery Department, Hospital São Lucas da Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil; Cardiovascular Surgery Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
6. Postgraduate Program in Cardiology and Cardiovascular Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Cardiology Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil