Black Country and West Birmingham STP Hypertension Pathway
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Black Country and West Birmingham STP Hypertension Pathway Approved for use in Walsall: October 2019 Review Date: October 2022 Scope of Document This pathway will cover screening, diagnosis, treatment and referral options for people with or suspected of having hypertension, the document links to other programmes such as the NHS Health Checks programme and to the Quality and Outcomes Framework. Please note: This document does not cover gestational hypertension, pre- eclampsia, pregnancy or breastfeeding. This guidance does not cover management of hypertension for Type 2 Diabetes (See NICE guideline CG87) or Chronic kidney disease (CKD) (See NICE guideline CG182). Individual CCGs are requested to add their own hyperlinks for local guidelines which are alluded to throughout this document which are yet to be agreed at STP level e.g. hyperlipidaemia guidelines, hypertension guidelines Acknowledgement: South West London Medicines Optimisation Group NHS Dudley CCG Hypertension guidelines NHS Dudley Lipid management guidelines Contents Overview ………………………………………………………………………………………………………………………………………………………………………………………………………………………..…………..1 Definition of Hypertension……………….…………………………………………………………………………………………………………………….……………………………………………………...…..….........2 Factors affecting blood pressure readings.……………………………………………………………….….…………………………………………………………………………………………………………......3 Measuring Blood Pressure….………………………………………………………………………………….………………………………………………………………………………………………..…….……………..4 Investigation and diagnosis of hypertension ……………………………………………….………………………………………………………………………………………………………….………………..5 Non-pharmacological management of hypertension ……………………………………………………………………………………………………………………………….……………………………………6 Complications and referral ……………………………………………………………………………….……………………………………………..……………………………..…………………………………………….7 Pharmacological Management of Hypertension ……………………………….…………………………………………………………………………………………………………………………………….......8 Algorithm – Summary of monitoring for Blood Pressure…………………………………………………………………………………………………………………………………..………………………..9 Summary of Black Country and West Birmingham STP hypertension guidelines algorithm……………………………………………………….……………………………………………………10 References…………………………………….……………………………………………………………………………………………………………………………………………………………………………….……………11 Overview - Black Country and West Birmingham STP Footprint As a sustainability and transformation partnership (STP), data from the NHS England footprint indicates that of the Black Country and West Birmingham STP including Dudley, Sandwell and West Birmingham, Wolverhampton and Walsall, all four CCGs are statistically higher than the national average according to data from 2015/2016 in hypertension prevalence.1 With reference to percentage of patients with hypertension whose BP < 150/90, Dudley, Sandwell and West Birmingham and Wolverhampton have areas for improvement identified from data provided by NHS England 2015/16 STP footprint. Using a population segmentation approach and collaborative working across the Dudley Health Economy over the last decade has seen the Standardised Mortality Rate from hypertension related diseases move from twice the England average to be in line with the England average. Continued work to reduce the hypertension prevalence gap is required. It is anticipated that for every additional 1,000 patients’ Blood Pressure (BP) controlled, there are £469k of savings for the NHS over 5 years, or £469 per patient. This would mean a total potential cost saving of £13m over 5 years for the 27,800 patients missing from hypertension registers in Dudley. In addition to this we know that by reducing BP from 150/90mmHg to 140/90mmHg, the risk of CHD is reduced by 22% and the risk of stroke is reduced by 41%.2 NHS Health Check: Dudley Pathway Vascular Risk Assessment and Management supports the information contained within this document. http://www.dudleyformulary.nhs.uk/download/449/nhs-health-check-pathway 3 Reference: https://www.england.nhs.uk/rightcare/products/stp-footprints/ 1 Definition of Hypertension Definition of Hypertension “When blood pressure remains higher than normal over time (at least several months) it is called variously, high blood pressure, raised blood pressure or hypertension. Hypertension occurs when the heart has to use more energy to pump against the greater resistance of the vascular system” Hypertension in adults: diagnosis and management (2011 updated 2016) NICE guideline CG1274 Blood Pressure = Cardiac Output x Peripheral Resistance Hypertension screening is included in the NHS Health Checks Programme, which seeks to invite people without a vascular condition or hypertension for a health check. If blood pressure is found to be raised at the time of the check, this is highlighted to GP practices who then follow-up these patients following the hypertension diagnostic pathway. NHS Health Check: Clinical Pathway for the Management of Cardiovascular Risk 5 Signs and Symptoms Investigations Hypertension is usually Other symptoms may indicate asymptomatic, but there are • CVD Risk assessment • Lifestyle blood pressure has risen to a some indicators which should • Full lipid Profile • Eye dangerously high level. prompt a blood pressure check. • Manual Pulse • Thyroid function These include: These include: • ECG • Phaeochromocytoma • Chest pain • Headaches • Renal • Hyperaldosteronism • Sweating • Dizziness • eGFR • Cushing’s syndrome • Shortness of breath • Blurred vision • Proteinuria • Obstructive sleep apnoea • Wheeze • Epistaxis • Haematuria • Coarctation of the aorta • Transient vision loss • Tinnitus • HbA1c • Acromegaly • Loss of consciousness • Palpitations • Fasting glucose • Fits • Nocturia Other Determinants Hypertension is more common in BME groups. African-Caribbean groups have a higher risk of hypertension and subsequent stroke or renal failure, but not higher levels of coronary heart disease, whilst South Asians also have a higher risk of hypertension, but tend to have higher levels of coronary heart disease and Type 2 diabetes. Ethnic differences in hypertension and blood pressure control in the UK 6 Black people (as they are referred to in NICE guidance),4 i.e. those people of African or African-Caribbean origin have a much higher prevalence of hypertension. For this reason, many studies have been conducted looking at their response to anti-hypertensive medication. Differences were found in response to drug treatment for black people, indicating treatment with specific anti- hypertensive drugs and combinations. People in lower socioeconomic groups also have a higher risk of hypertension and an increased risk of cardiovascular mortality compared to more affluent groups. Risks of socioeconomic deprivation on mortality in hypertensive patients 7 Factors affecting Blood Pressure Readings High Risk Groups Certain lifestyle behaviours will increase the risk of developing Some co-morbid conditions are more commonly associated hypertension. These include: with hypertension, these are: • Smoking Cardiovascular • Alcohol consumption (where this is over recommended limits) • Obesity • Atrial Fibrillation • Physical inactivity • Coronary heart disease • High salt intake • Hyperlipidaemia • Stroke and TIA Renal Certain drugs may also affect blood pressure control. These include: • Chronic kidney disease • Renal artery stenosis • Combined oral contraceptives • Phaeochromocytoma • Immunosuppressant therapy • NSAIDS • COX-2 inhibitors e.g. Etoricoxib Endocrine • Stimulants (including caffeine products such as coffee, cola) • Mineralocorticoids • Diabetes • Glucocorticoids • • Anti-parkinsonian drugs Hyperaldosteronism • Monoamine oxidase inhibitors • Cushing’s syndrome • Anabolic steroids • Hyperthyroidism • Sympathomimetics • Acromegaly • Illicit drugs use Soluble analgesia and some indigestion remedies have a high salt content and Pulmonary should also be avoided where possible. For further information see the Dudley guideline, Salt Content of Soluble Analgesics and Indigestions Remedies • Chronic obstructive pulmonary disease • Obstructive sleep apnoea Measuring Blood Pressure Devices Mercury Sphygmomanometers continue to provide the reference standard for measurement of blood pressure although, due to their bulk and the fact that they contain mercury their use is currently being phased out. If using a mercury device, then a mercury spillage kit should be available at all times and it should not be taken out of the building. Mercury devices are not available to buy. Hybrid devices are available which resemble the mercury sphygmomanometer but use an LED display in place of a mercury column. They are used in the same way as the mercury devices by auscultation of the brachial artery. Aneroid Sphygmomanometers measure pressure using a bellows system. They can be less accurate than alternatives, especially over time. For this reason it is recommended that they are calibrated every 6 months. Automated devices are recommended for ease of use in clinic and by patients for HBPM. However, as the devices work on oscillometry which needs to be in a regular flow, any irregular pulse will cause an error message on the machine. If error messages are observed, then a manual pulse should be taken to rule out an irregular pulse before attempting to measure blood pressure with the automated device again or with another device. Postural Hypotension If hypertension is not diagnosed, BP should be checked every 5 years . Where BP is borderline, follow-up should be arranged more frequently. Where postural hypotension is suspected, i.e. in those with dizziness on standing,