Lessons and limitations
Significant improvements in the important clinical surrogate marker of secondary prevention prescribing were seen over this 4-year programme. Patients with LVSD as a result of an acute MI need to be aggressively managed, as adverse cardiac remodelling can rapidly develop in the post-acute phase of the myocardial insult.18 19 Evidence shows that early pharmacological optimisation can impact favourably on such adverse remodelling.19 Thus, early optimisation of medication in this programme gives patients the best chance of left ventricular recovery and the prevention of HF.
Suboptimal uptitration of secondary prevention medication following acute MI is not a problem unique to NHS Greater Glasgow and Clyde. Evidence from the UK and international healthcare systems highlights the need for further work.20–27 The optimisation of ACEI (or ARB) and beta-blocker seen in this programme is superior to that described in previous studies and, therefore, some of the learning may be applicable to other areas.25–27
The involvement of pharmacist independent prescribers as care providers in cardiac rehabilitation programmes is a growing role globally.21 28 29 It is recognised from within pharmacy that for such interventions to succeed they need to be collaborative and multidisciplinary in nature, rather than standalone systems.15 Multidisciplinary models of care, anchored by senior medical leadership, are accepted standards of care,5–8 and such working within our programme delivered a clearly defined and robust clinical governance structure, generating widespread trust and confidence in all staff members.
This project was supported by initial NHS funding, designed to support the Scottish Government pharmacy strategy.30 Without this funding, senior local strategic pharmacy support and the underpinning government policy, this service would not have been sustainable. Commitment of the pharmacy teams involved was also supported by a redesign in workload, including utilising better skill mix and rationalising the necessity of historic tasks.
Strengths
This is the first UK programme to systematically describe the post-discharge optimisation of secondary prevention in patients with post-MI LVSD across a large regional health authority. In doing so, it sets a benchmark for comparison for future clinicians and researchers.
The delivery and evaluation of complex interventions is notoriously difficult.31 This quality improvement programme delivered lasting change over Scotland’s largest health authority, utilising multiple different healthcare professionals across primary and secondary care. The collaborative ‘hub’ and ‘spoke’ model used, incorporating both generalists and specialists, has the potential to be replicated by others.
Across Scotland, independent prescribing qualifications are underutilised by pharmacists; this represents an untapped resource.32 The ‘Teach and Treat’ model was implemented as a means of supporting clinical supervision for this group to improve competence and confidence in autonomously managing patients. This type of project, where targeted at measurable public health problems and supported by appropriate governance structures, has the potential to improve clinical outcomes and frontline service delivery. As such, this project is now cited in the Scottish Government strategy for pharmacy as a potential future model of care for the profession.30
The work burden for medical staff, including consultants and GPs, is growing.33 34 The ageing population and increasing multimorbidity is likely to worsen this problem. This model has the scope to spread prescribing and medication optimisation roles, traditionally delivered by medical staff, across other disciplines.
Limitations
Some of the limitations of the baseline model of care may not be applicable to other regions. For example, our baseline cardiac rehabilitation model of care did not involve nurse-led prescribing, as seen in some other authorities. Therefore, our findings may not be the best solution in such areas.
The ‘hub’ clinic model does require patients to attend pharmacist-led clinics at the hospital, in parallel to the conventional cardiac rehabilitation programme, and appointment burden is known to impact significantly on cardiac patients.35 A study of qualitative patient feedback has been completed to address these concerns and awaits publication. Evolution of the intervention across PDSA Cycles 2–4 also involved reviewing ‘lower risk’ patients closer to home, in local health centres, to partially address this issue and in keeping with Scottish Government health policy.36
As a complex intervention, the clinic model consists of multiple new components, including the introduction of pharmacists as caregivers, the direct prescribing of medications from clinics (rather than making recommendations to GPs) and an enhanced engagement model utilising phone calls in addition to letters. It is not possible to know the weight of influence of each of the components on the outcome.
As a quality improvement project, rather than a randomised controlled trial, this project is inherently at greater risk of confounding. For example, the patient characteristics in each of the baseline audits and PDSA cycles are likely to differ. This may be reflected in the slight changes in ACEI (or ARB) and beta-blocker prescribing seen over time. It is uncertain whether this is explained by the difference in the patient cohort over time, such as patients with more severe LVSD in the pilot phase having a higher sympathetic drive and hence tolerating slightly higher doses of beta-blocker. Alternatively, changes may reflect the challenges of involving more staff members with different levels of experience. There were also significant changes in our health authority over the time period of the intervention, including the closure of three older hospitals and the opening of a new state-of-the-art hospital to provide acute care to a large proportion of the population. Reasons for not achieving target doses were not available for both time periods, so are not described.
The pharmacists involved in clinic delivery also commonly impacted on mineralocorticoid receptor antagonist optimisation, as seen in the pilot.17 Complete data, including the presence or not of heart failure symptoms and diabetes, needed to compare these endpoints across the whole population were not available in all cardiac rehabilitation databases used for the baseline audits. All patients were also not eligible for these medications (eg, those with mild LVSD). Other clinical factors, including patient education, cardiac rehabilitation engagement, medicines reconciliation, lipid control and the requirement for reassessment of left ventricular function (where appropriate), were also commonly reviewed. Similarly, complete data were not available in the baseline audits in order to describe and compare these interventions, and some of these interventions were only appropriate in subsets of patients.
This paper only describes the prescribing outcomes of patients that were known to the local cardiology teams and engaged with the cardiac rehabilitation process after discharge. It is well known that many patients do not engage fully with cardiac rehab after discharge.37 The Inverse Care Law suggests that this group of patients may ultimately have the greatest unmet need.38
Next steps
This paper describes the short-term optimisation of ACEI (or ARB) and beta-blockers in patients with LVSD as a result of an acute MI. Future work is needed to describe the persistence of prescribing over time in these patients. The impact of this project on clinical outcomes is also unknown and requires appropriate evaluation. Plans are underway to deliver a sequential national roll-out of the model to other Scottish regional health authorities.
In parallel to this work, the pharmacy profession in Scotland are now systematically delivering frontline care in primary care.39 This paradigm change in the working model of the profession brings with it both opportunities and challenges for this project. Ultimately, this change will result in workforce-wide pharmacists delivering these types of interventions as part of routine practice. Plans to adequately train, support, ensure governance and evaluate these processes are vital to ensure success.
To support the delivery of these new advanced pharmacist roles within the cardiology multidisciplinary team, a competency framework for pharmacists has been developed40 and work is underway to accredit this with the Royal Pharmaceutical Society, in order to standardise the quality and consistency of this type of advanced practice.