An evaluation of the effectiveness of a lipid clinic in identifying people with familial hypercholesterolaemia and reducing their risk of cardiovascular disease

Abstract

Abstract Introduction The NHS Long Term Plan aims to ‘prevent up to 150,000 heart attacks, strokes and dementia cases over the next 10 years’.1 People with Familial Hypercholesterolaemia (FH) are considered to be at high-risk of heart attack, stroke and dementia but an estimated 90% remain undiagnosed.1 The Chesterfield and Dronfield Primary Care Network were commissioned to set-up a 12-month pharmacist-led clinic across 9 practices to identify, treat and refer FH patients. Patients with suspected FH benefit from referral to specialist services.2 Aim This study aimed to evaluate the number of FH patients identified and any unintended benefits of the Lipid Clinic. Methods Ethical approval was not required for this service evaluation. Informed consent was sought prior to data collection and the dataset was anonymised. Searches of practice patient records identified patients with a previously raised lipid level (total Cholesterol >7.5mmol/L and/or non-HDL-C > 5.9mmol/L)2 for review in the Lipid Clinic. Patients reviewed in the Lipid Clinic were initiated/optimised on lipid lowering medication as appropriate.2 Data were collected for patients invited for review in the Lipid Clinic between May-July 2022. Patients’ attendance as well as decline/non-response to the Clinic was recorded. The data collected included family history, QRISK score (where applicable), lipid lowering treatment the patient was taking (if any) and blood tests results (serum lipids, HBA1c and thyroid function tests). If bloods were deranged it was documented whether or not it was a new finding. The data was analysed by categorising patients into potential FH, primary/secondary prevention of cardiovascular disease and whether they needed referral to secondary care. Results Out of the 260 patients invited for review, 219 attended the clinic. Of these, 30 (13.7%) were provided with lifestyle advice as they did not meet the criteria for treatment. Twenty-three patients (10.5%) met the Simon-Broom criteria for possible FH. A further 3 patients identified were known to have FH but had not undergone genetic cascade testing. These 26 patients (11.8%) were referred to secondary care for genetic testing and specialist input. Newly raised HbA1c indicative of either diabetes or non-diabetic hyperglycaemia was incidentally found in 39 patients (17.8%). Lipid-lowering medication was initiated/titrated in 189 patients (86.3%). Discussion/Conclusion The significant proportion of patients requiring follow up in secondary care (11.8%) suggesting targeted searches are effective in identifying patients with possible FH. Identifying FH patients, testing and treating their family members appropriately reduces their risk of cardiovascular events.2 The Lipid Clinic has identifying that nearly a fifth of patients were previously undiagnosed with either diabetes or non-diabetic hyperglycaemia (17.8%) suggests that this is also an opportunity to identify and treat these patients earlier than they would otherwise have been identified. The results highlight the need for primary care staff education on the new AAC NHS Guidelines2 relating to managing lipid results. One limitation of the study is although the Lipid Clinic has received good informal feedback, formal feedback is yet to be collected from patients and stake holders. In addition, the clinic is still ongoing, and more data is being collected.