1. Arrhythmia Section, Institut del Torax, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
2. Department of Cardiology, Hospital Universitario Virgen de la Arrixaca, Universidad de Murcia, Instituto de Investigación Biosanitaria Virgen de la Arrixaca, IMIB-Arrixaca, Murcia, Spain
3. Internal Medicine Service, Hospital Universitario Dr. Josep Trueta, Girona, Spain
4. Cardiovascular Critical Unit, Department of Cardiology. Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
5. Neurology Department and Stroke Unit, Complejo Hospitalario de Navarra, Pamplona, Spain