jeannie hayhurst cardiovascular specialist nurse
TRANSCRIPT
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Hypertension Workshop Blackburn with Darwen PCT
Jeannie HayhurstCardiovascular Specialist Nurse
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What is hypertension? Facts and figures The most common continuing medical condition seen by
family doctorsNot a disease but a condition that puts someone more at
risk of a diseaseIt affects 25% of the adult population & about 50% of all
people over the age of 60yrsPrevalence is slightly higher in men than women: 31.5%
as opposed to 29% (Health Survey for England 2010)“Is one of the most preventable causes of premature
morbidity and mortality world-wide” (NICE 2011)
Sustained blood pressure ≥ 140/90 mmHg
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New NICE guidelines 2011Changes to diagnosisChanges to treatment algorithmNew targets
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Measuring BP Devices must be validated, maintained and regularly recalibrated Appropriate cuff size Relaxed temperate setting, patient seated for 3-5 mins Palpate pulse first Measure BP in both arms If difference between arms is >20mmHg repeat the measurements If it remains >20mHg, measure subsequent BPs in the arm with the higher
reading (Consistent inter-arm differences of >20/10mmHg warrants specialist referral)
If BP is ≥ 140/90 take a second reading If the second reading is substantially different from the first take a third
reading Leave a minute between each reading Record the lower of the last two readings
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Check the following if reading is raised:
That the person has not hurried to the session
That their bladder is empty!That they haven’t had a large meal, alcohol,
caffeine, cigarettes and exercise in previous 30 minutes
Don’t forget:BP rises on waking & then tends to fall
through the day.BP tends to be higher in colder weather
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Confirming DiagnosisIf clinic BP is <140/90 review 5 yrlyIf clinic BP is 140/90 or higher offer
ABPM to confirm diagnosisIf unable to tolerate ABPM, HBPM is a
suitable alternativeWhilst waiting to confirm diagnosis carry
out invx for target organ damage and CVD risk assessment
If clinic BP ≥ 180/110 consider starting treatment immediately
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ABPM – to confirm diagnosis Ensure that at least two measurements per hour are
taken during the persons usual waking hoursUse the average value of at least 14 measurements
taken during the persons usual waking hours to confirm a diagnosis of hypertension
24hr ABPM may be required for patients who might be more at risk of “ non- dipping” i.e. whose BP does not dip at night, as is normal. (these may be people with existing target organ damage who appear controlled and patients with Type 1 diabetes with microalbuminuria)
N.B Practices who do not have their own ABPM can refer patients to Darwen or Barbara Castle HC using a D1 form
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ABPM – patient informationProvide patient with instructions on how to turn off and remove
the device if day time only readings are requiredGive advice on wearing appropriate clothing i.e. allowing access
to upper arm and easily removed Advise that bathing or showering is not permissible whilst the
monitor is attachedWhen the cuff tightens advise that they try to relax, and keep
their arm still and at heart level if possibleWarn that the monitor may repeat the measurement a minute
laterAdvise that driving with the monitor in place is permissible but
if possible try to pull over when a measurement is been takenTell the patient to try and have a normal day!
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HBPM – to confirm diagnosisFor each BP recording two consecutive
measurements are taken, seated, at least 1 minute apart
BP is recorded twice daily, ideally morning and evening
Record measurements for at least 4 days, ideally 7 days
Discard measurements taken on the first day and use the average of the remaining measurements to confirm a diagnosis
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HBPM – things to noteMonitors should be validated and maintainedWrist monitors are not recommended and can
be inaccurate but may be acceptable if the patient has had bilateral mastectomies, has sustained injuries to both upper arms or is grossly obese.
Only about a third of patients fully comply with instructions
Observer bias/prejudice is possibleNot appropriate for patients with
arrhythmias
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What the readings mean (ABPM/HBPM)Daytime average
<135/85mmHg
Daytime average ≥135/85mmHg CVD risk <20%/No target organ damage
Daytime average ≥135/35mmHg CVD risk >20% /Target organ damage
Daytime average ≥150/90mmHg
Not hypertensive- recheck BP within 5yrs
Stage 1 hypertension – No treatment; reassess annually
Stage 1 hypertension; treat according to NICE ACD chart
Stage 2 hypertension; treat according to NICE ACD chart
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NICE definitionsStage 1 hypertension:• Clinic blood pressure (BP) is 140/90 mmHg or
higher and• ABPM or HBPM average is 135/85 mmHg or higher.
Stage 2 hypertension: • Clinic BP 160/100 mmHg is or higher and• ABPM or HBPM daytime average is 150/95 mmHg
or higher.
Severe hypertension: • Clinic systolic BP is 180 mmHg or higher or• Clinic diastolic BP is 110 mmHg or higher.
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Hypertension UpdateMammen Ninan
GPwSI CardiologyNovember 2012
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Effect of systolic and diastolic BP on mortality
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Event free survival and relation to night time dipping of BP
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Management of HT
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Modest reductions in SBP can substantiallyreduce cardiovascular mortality
SBP = systolic blood pressure; CHD = coronary heart disease
% Reduction in Mortality
Reduction in SBP (mmHg) Stroke CHD Total
2 -6 -4 -3
3 -8 -5 -4
5 -14 -9 -7
Adapted from Whelton PK, et al. JAMA 2002;288:1882-1888.
Afterintervention
Beforeintervention
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Step 4
Summary of antihypertensive drug treatment
Aged over 55 years or black person of African or Caribbean family origin of any age
Aged under55 years
C2A
A + C2
A + C + D
Resistant hypertension
A + C + D + consider further diuretic3, 4 or alpha- or
beta-blocker5
Consider seeking expert advice
Step 1
Step 2
Step 3
KeyA – ACE inhibitor or low-cost angiotensin II receptor blocker (ARB)1 C – Calcium-channel blocker (CCB) D – Thiazide-like diuretic
See slide notes for details of footnotes 1-5
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What are the key elements of effective BP control?
Are your current therapy choices delivering effective control of blood pressure in all your hypertensive patients?
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What is resistant Hypertension
Failure to control BP to < 140/90 or <130/80 in diabetics, in spite of being on 3 different antihypertensive agents, one of which is a diuretic
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Causes of Resistant Hypertension Suboptimal drug therapyWhite coat hypertension Coexisting conditions – esp.
obesity/metabolic syndrome/OSAAntagonising substances (usually sodium)Non-complianceCoexisting medications – eg NSAID’s,
OCAUnrecognised secondary causes of
hypertension
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Important Secondary (identifiable) Causes of HypertensionSleep apnoeaDrug induced/ relatedChronic kidney diseasePrimary aldosteronismRenovascular diseaseCushing’s Syndrome or steroid therapyPhaeochromocytomaCoarctation of the aortaThyroid/ parathyroid disease
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Case Study55 year old lady comes to surgery for foot
pain, she is slightly overweight with BMI of 28. Her BP was last checked 10 years ago, and you check it to satisfy QOF, and it is 158/108.
Her mother had hypertension and had a stroke at the age of 70 yrs. Patient is a non smoker, works in a GP surgery as Practice Manager and admits to being stressed at work
Her urine dipstick is clear, ECG does not show any signs of LVH
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