Investigation and inquest
On 12 December 2013 an investigation into the death of SANDRA HAZEL ELIZABETH HIGHAM, then aged 65 years, was opened by deputy coroner Lorna Tagliavini. On 10 June 2014 an inquest into Ms Higham’s death was opened by assistant coroner Sarah Ormonde-Walsh. The inquest was adjourned. The inquest into Ms Higham’s death was resumed, and concluded, by myself on 17 October 2014.
The medical cause of Ms Higham’s death was cerebral ischaemia, caused by atrial-oesophageal fistula, caused by ablation for atrial fibrillation.
The conclusion of the inquest was a narrative conclusion, as follows:
(1) Ms. Higham died at St. Thomas's Hospital, London on 7 December 2013.
(2) She had undergone an ablation procedure to her heart on 17 October 2013 and this had caused an atrial-oesophageal fistula to develop.
(3) This led to her suffering neurological, fever and vomiting symptoms for which she was admitted to Tunbridge Wells Hospital on 23 November 2013. A fistula of this nature is a very rare, but known, risk of the ablation procedure.
(4) She was transferred to St. Thomas'. Hospital, London on 24 November 2013 when two attempts were made to 'stent' her heart, but she died from the neurological consequences of the fistula, on 7 December 2013.
Circumstances of the death
The circumstances of the death are reflected in the narrative above.
Coroner’s concerns
(1) The ablation procedure, as a method of addressing atrial fibrillation, is becoming more widespread (an increase of around 20-30% in recent years).
(2) The development of an atrial-oesophageal fistula is a very rare, but known, risk of the ablation procedure (developing in around 0.01-0.2% of cases of percutaneous ablation and around 1-1.5% of cases of surgical ablation).
(3) If an atrial-oesophageal fistula does develop, it has a very high mortality rate (reported to be 67-100%).
(4) According to the literature there are no clear predictors of mortality from an atrial-oesophageal fistula, but early diagnosis, prompt surgical intervention and prolonged antibiotic therapy may be crucial for survival.
(5) Diagnosing an atrial-oesophageal fistula can be difficult, especially in an acute medical setting, given its range of non-specific symptoms and duration of onset, and the lack of awareness within the wider medical profession of such a fistula being a risk of the ablation procedure.