[1] Univ Florence, Geriatr Intens Care Unit, Largo Brambilla 3, I-50134 Florence, Italy
[2] Univ Florence, Geriatr Arrhythmia Unit, Largo Brambilla 3, I-50134 Florence, Italy
[3] AOU Careggi, Largo Brambilla 3, I-50134 Florence, Italy
[4] Univ Liverpool, Liverpool Ctr Cardiovasc Sci, Liverpool, Merseyside, England
[5] Liverpool Heart & Chest Hosp, Liverpool, Merseyside, England
[6] Aalborg Univ, Dept Clin Med, Aalborg Thrombosis Res Unit, Aalborg, Denmark