Incidental Hypertension

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INCIDENTAL HYPERTENSION:

How to manage

Dr. Saulat Siddique,

Professor of Cardiology,

Shaikh Zayed Hospital, Lahore.

FAMILYCON 2013,

4-5-6 January, 2013, Lahore.

Q. No.1

Regarding Blood Pressure measurement;

1. SBP is when the first Korotkoff sound is heard

2. DBP is when the sounds become muffled

(Korotkoff phase IV)

3. BP reading should be rounded to the nearest 5 or zero e.g. 130/85mmHg

4. BP reading should be written as 132/86mmHg i.e. recorded to the nearest even number

BLOOD PRESSURE MEASUREMENT

• Record the result for systolic and diastolic pressures to the nearest 2mmHg. For the systolic reading, record the level at which the first (at least two consecutive) sound is heard.

• For the diastolic reading, use phase V Korotkoff

(disappearance of sound). Only use phase IV

Korotkoff (muffilng of sound) if sound continues towards zero.

PHL/PCS Hypertension Guidelines, 2009

Q. No. 2. A 43 year old previously healthy male visits his family practitioner for symptoms of flu. His BP is found to be 146/96.

He should be;

1. Started on anti-hypertensive medication

2. Advised life style measures

3. Given a sedative

4. Asked to come back for follow-up visit

Q. No. 3

Regarding the BP cuff;

1. Cuff size is same as bladder size

2. Length should cover the full arm circumference

3. Width should be half the arm circumference

4. Inappropriately small cuff will give a falsely low reading

BLOOD PRESSURE MEASUREMENT

• The bladder length should be at least 80% and the width at least 40% of the circumference of the mid-upper arm. Use of a ‘standard size’ cuff in people with large arm can result in artificially high blood pressure reading. If an oversized cuff cannot be satisfactorily fitted on a large arm then the utilization of an appropriately sized cuff on the forearm with radial artery auscultation should be considered.

PHL/PCS Hypertension Guidelines, 2009

BLOOD PRESSURE MEASUREMENT

• Patients should sit for several minutes in a quiet and comfortable place

• Use appropriate cuff size for age and weight

• Have cuff at heart level

• Deflate the cuff @2-3mmHg/beat

• Take minimum 2 measurements at least 1-2minutes apart.

• Ask the patients to return for 1-2 more visits, if BP is elevated on first visit (to confirm the diagnosis of hypertension), before starting treatment

PHL/PCS Hypertension Guidelines, 2009

BLOOD PRESSURE MEASUREMENT

• NICE guidelines (2011) state that there should be complete skin contact of the stethoscope with no clothing in between

• The Pakistani guidelines state that, “In Pakistani setting, BP is quite often measured with shirt sleeve on rather than bare arm, especially in ladies. A recent Canadian Study indicates that there is no difference in BP reading if average thickness of sleeves is 4.3 mm or less.”

Q. No. 4.

Life style measures include;

1. Low sodium diet

2. Exercise like weight lifting and push-ups

3. Diet rich in potassium

4. Aerobic exercise

LIFESTYLE MODIFICATIONS TO REDUCE BLOOD PRESSURE

• Ask patients about their diet and exercise patterns, and offer guidance and written or audiovisual information

• Regular aerobic physical activity is recommended for all persons, but those with advanced or unstable CVD may require a medical evaluation before initiation of exercise or a medically supervised exercise program.

Isometric exercise such as heavy weight lifting can have a pressor effect and should be avoided.

• Ask about alcohol consumption and encourage patients to cut down if they drink excessively

• Discourage excessive consumption of coffee and other caffeine-rich products

• Encourage patients to reduce their salt intake or use a substitute

• Offer smokers advice and help to stop smoking

• DO NOT OFFER

• Calcium, magnesium or potassium supplements to reduce blood pressure

• Relaxation therapies can reduce blood pressure and patients may wish to try them. However, primary care teams are not recommended to provide them routinely

PHL/PCS, Hypertension Guidelines 2009

IMPACT OF LIFE-STYLE CHANGES ON REDUCTION OF SBP

Intervention

Increased Magnesium (Mg)

Increased Calcium (Ca)

Increased Potassium (K)

Fish Oil

Reduced Sodium (Na)

Reduced Weight

Exercise

Dash Diet

Reduction in SBP (mmHg)

0 – 1

2

4

8

10

6

6

12

PHL/PCS, Hypertension Guidelines 2009

Q. No. 5.

Follow-up visit after 2 weeks reveals sitting BP of

138/90 in the right arm and 148/92 in the left arm. He should be;

1. Investigated for stenosis in the right subclavian/axillary artery.

2. Sent for fundoscopy

3. Checked for waist circumference

4. Checked for postural hypotension

BLOOD PRESSURE MEASUREMENT

• Measure Blood Pressure in both arms. Take the higher value as baseline

• Difference of 5/10 mm can be considered as normal

• Waist circumference is an essential part of the physical examination as is fundoscopy

• Measure BP in standing position in elderly, diabetes and in case of hypotension inducing drugs

PHL/PCS, Hypertension Guidelines 2009

Q. No. 6.

The following are essential in his workup;

1. Serum sodium and potassium

2. Urine for VMA

3. Echocardiography

4. Complete Lipid Profile

INVESTIGATIONS (Minimal)

• Urine analysis for proteins (can be done with a dipstick as a starter)

• Serum creatinine levels

• Serum potassium and sodium levels

• Random blood sugar

• ECG for evidence of established coronary artery disease (CAD) or LVH

• Chest X Ray (PA view)

PHL/PCS, Hypertension Guidelines 2009

LIPID PROFILE

• Part of special investigations in Pakistani guidelines

• ESC guidelines recommend complete Lipid

Profile as an essential test

• NICE guidelines recommend that only total cholesterol and HDL should be done

SPECIAL INVESTIGATIONS

(On case to case basis)

• Echocardiogram

• Lipid Profile

• Carotid (and femoral) ultrasound

• C-reactive protein

• Microalbuminuria (essential test in diabetics)

• Quantitative proteinuria (if dipstick test positive)

• Search for secondary hypertension: measurement of renin, aldosterone, corticosteroids, catecholamines, arteriography, renal & adrenal ultrasound, computer assisted tomography (CAT), magnetic resonance imaging

PHL/PCS, Hypertension Guidelines 2009

Q. No. 7.

He should be started on;

1. ACEI

2. ARB

3. CCB

4. Diuretic

5. Combination Tablet

Antihypertensive Drug Treatment: NICE 2011

A =

ACEi or ARB

C = CCB

D = Thiazide-like diuretic such as chlorthalidone (12.5 mg–25 mg once daily) or indapamide rather than thiazide diuretic such as bendroflumethiazide or hydrochlorothiazide.

C* = CCB preferred but consider thiazide-like diuretics in people with oedema or a high risk of heart failure

Further diuretic** = low-dose spironolactone or higher doses of a thiazide-like diuretic

Q. No. 8.

He should also be prescribed;

1. Aspirin

2. Atorvastatin

3. Bromazepam

75mg OD

10mg OD

3mg OD

• Aspirin is only recommended in those with

IHD, CKD and in high cardiovascular risk subjects in the ESC guidelines

• Statins are recommended in IHD, DM and in high cardiovascular risk subjects in the ESC guidelines or if cholesterol levels are high.

HISTORY

• Detailed history is essential

• Prior history of high BP, kidney disorders, stroke, heart disease, diabetes, dyslipidemia.

• Complications of pregnancy

• Drug history

– NSAIDs

– Oral Contraceptives

– Previous antihypertensives

• Family history of hypertension, heart disease, diabetes

• Smoking and dietary habits

PHL/PCS, Hypertension Guidelines 2009

SIGNS OF ORGAN DAMAGE

• Brain: murmurs over neck arteries, motor or sensory defects

• Retina: fundoscopic abnormalities

• Heart: location and characterstics of apical impulse, abnormal cardiac rhythms, ventricular gallop, pulmonary rales, dependent edema

• Peripheral arteries: absence, reduction, or asymmetry

PHL/PCS, Hypertension Guidelines 2009

The importance of 24-hour blood pressure control in hypertension management

 ESC/ESH Guidelines 1  NICE Guidelines 2011 2

“Drugs which exert their antihypertensive effect over 24 hours with a once-a-day administration should be preferred”

• “If the clinic BP ≥140/90 mm Hg offer 24hour ambulatory blood pressure monitoring (ABPM) to confirm the diagnosis of hypertension (NEW 2011)

• “when possible recommend treatment with drug taken once a day”

24

1. Mancia G, et all. J Hypertens.

2007;25:1105-1187. 2. NICE Guidelines 2011.

NICE Chart of AB/CD with de-emphasis on beta-blockers

> 55 years or Asian /

Chinese

C or D STEP 1

STEP 2

STEP 3

< 55 years

A

A+C or A+D

A+C+D

Add: Further D/C therapy STEP 4

Alpha Blockers

Beta Blockers etc

A: ACEI/ARB C: CCB, D: Diuretic

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