Her previous regional roles have included Imaging Lead for the Greater Manchester and Cheshire Cardiac Network and Imaging Lead for the South Sector Partnership of Manchester. National roles include a 6-year tenure on the British Society of Echocardiography (BSE) council. She is currently the National Lead for Stress Echocardiography for the BSE and her biggest achievement has been to set up the world’s first stress echocardiography accreditation programme. This programme has been running since 2017 and she is their Chief Examiner. Dr Macnab has written many of the service guidance documents for echocardiography on behalf of the BSE.
Along with her interventional colleagues at Wythenshawe hospital, Dr Macnab has played an integral part in the delivery of various technologies to fix the heart from the percutaneous route (i.e without the need for open heart surgery). This has included closing holes in the heart (atrial septal defect closure), plugging areas of the heart that form clots (LA appendage occlusion devices), repairing prosthetic valves that fail (closing para-valvular leaks) and replacing heart valves that are defective (TAVI valves for aortic valve narrowing). The most notable achievement in this regard was in 2010 when Dr Macnab became the lead for the echocardiography aspects for the UK percutaneous mitral repair programme. This procedure uses clips delivered from the leg to repair the mitral valve. Wythenshawe Hospital became one of only 3 UK centres where this procedure was commissioned to treat patients with severe mitral valve disease and she has lectured at various national and international meetings on this topic since then.