AV Block

• NY Presbyterian Weill Cornell Medicine — New York, United States
• Wake Forest University Health — Winston-Salem, North Carolina, United States
• Cardiology Consultants of Philadelphia — Paoli, Pennsylvania, United States
• UVA Health University Medical Center — Charlottesville, Virginia, United States

• Ospedale Generale Regionale "F. Miulli" — Acquaviva delle Fonti, Bari, Italy
• Ospedale del Cuore 'G. Pasquinucci' Fondazione Toscana 'Gabriele Monasterio' — Massa, Massa-Carrara, Italy
• Azienda Ospedaliero Universitaria Pisana — Pisa, Italy

• Hospital Clínic de Barcelona — Barcelona, Spain

• University Hospitals of Leuven — Leuven, Flemish Brabant, Belgium

• Mercy Gilbert & Chandler Regional Medical Centers, Gilbert AZ — Gilbert, Arizona, United States
• University of Arizona College of Medicine- Phoenix — Tucson, Arizona, United States
• University of Arkansas for Medical Sciences (UAMS) — Little Rock, Arkansas, United States
• University of California San Diego — La Jolla, California, United States

• Hospital del Mar - IMIM — Barcelona, Spain

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• The First Teaching Hospital of Xinjiang Medical University — Ürümqi, Xinjiang, China