I have had persistent Atrial Fibrillation for many years, despite several cardioversions and two ablation procedures. It just would not go away. Doctor Boon Lim arranged for me to have a surgical ablation at Hammersmith Hospital and, almost a year on, my heart remains in sinus rhythm. Not only that, but he rejected the calls by other doctors after my surgery to fit a pacemaker, arguing that they had to wait and see if the operation worked. I am truly grateful. He is a fine doctor.