作者单位:Department of Cardiology, The Hillingdon Hospital, Pield Heath Road, Uxbridge, Middlesex, UB8 3NN[1]Southampton University Hospitals Trust, Southampton General Hospital, Tremona Road, So16 6YD[2]Dorset County Hospital, Williams Avenue, Dorchester DT1 2JY, United Kingdom[3]Hammersmith Hospital, Imperial College Healthcare NHS Trust, United Kingdom[4]