Lyons 1998.

Methods	Parallel RCT Ethics committee: not reported Informed consents: not reported Site: Harefield Hospital, Middlesex, UK Setting: university hospital Dates of data collection: unspecified Funding: unspecified Registration: unspecified
Participants	20 participants; mean age: not reported; sex distribution: not reported Inclusion criteria NYHA II or Ill participants with LVEF > 50% undergoing CABG Exclusion criteria Not reported
Interventions	Intervention Epidural analgesia (N = 10) Comparator Systemic analgesia (N = 10) Induction and maintenance: propofol and isoflurane plus fentanyl or epidural Surgery: CABG with CPB
Outcomes	Relevant to this review Risk of myocardial infarction Other Haemodynamic parameters
Notes	Correspondence: letter sent 16 March 2018; no reply Conflict of interest: not reported DOI: n/a Conference abstract; limited information
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote. "randomized"; no details provided
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not reported
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Low risk	No loss to follow‐up
Selective reporting (reporting bias)	Low risk	All results reported
Other bias	Unclear risk	Conference abstract; limited information