Transcript KSU Hypertension (UG, Feb 2013).ppt

HYPERTENSION: AN OVERVIEW
Prof Ahmed Mandil, Dr Hafsa Raheel
KSU Dept of Family & Community Medicine
Objectives
By the end of this session, students should be able to:
 Understand the basic concepts of hypertension
 Explain the magnitude of the problem
 Identify important risk factors for hypertension
 Identify the important complications of hypertension
 Explain important concepts of prevention and control of
hypertension
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Headlines
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Magnitude of the problem
Risk factors
Assessment & diagnosis
Complications
Prevention and control
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Magnitude
■ In developed and developing countries alike,
essential hypertension affects 25-35% of the
adult population. Up to 60-70% of those beyond
the seventh decade of life
■
Each increment of 20 mm Hg in systolic blood
pressure or 10 mm Hg in diastolic blood pressure
doubles the risk of cardiovascular disease events
independent of other factors.
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Prevalence of Hypertension in Obese
and non-Obese Saudis
The study group: 14.805
males: 6225
females: 8580
The age: 14 – 70 years
Non-obese prevalence:
4.8 %
2.8 %
Obese prevalence:
8%
8%
males
females
males
females
El-Hazmi M. Saudi Medical Journal 2001; 22 (1): 44-48
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Hypertension among attendants of primary health care
centers in Al-Qassim region, Saudi Arabia.
Study sample: 1114
Prevalence:
30 %
Higher among: ● Age > 40 years
● Overweight and obese people
● illiteracy
Awareness: 20 % of hypertensive women
25 % of hypertensive men
Khalid A et al. Saudi Med J 2001; 22 (11) 960-963
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Blood Pressure Measurement and
Hypertension Diagnosis
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1 in 5 adult Canadians have hypertension
Over 40% of Canadians at aged 56-65 have
hypertension
90% of normotensive persons aged 55-65 developed
hypertension in the next 20 years in the Framingham
study
2010 Canadian Hyprtension Education Program
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Hypertension in the communityRule of halves
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Risk Factors
Smoking
 Dyslipidaemia
 Diabetes Mellitus
 Obesity
 Age (older than 55 for men, 65 for women)
 Gender (men or postmenopausal women)
 Family History of cardiovascular disease (men under
age 55 or women under age 65)
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Modifiable Risk Factors for
Developing Hypertension
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Obesity
Poor dietary habits
High sodium intake
Sedentary lifestyle
High alcohol consumption
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Colors of Salt
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White
Black
Red
Yellow
Green
Brown
Clear
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Table salt
Soy sauce
Catsup
Mustard
Pickles
Soups & gravies
Saline
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High Risk Subjects
► ABP ≥ 180 systolic and/or ≥ 110 diastolic
► Systolic BP > 160 with low diastolic <70
► Diabetes mellitus
► Metabolic syndrome
► ≥ 2 cardiovascular risk factors (smoking,
dyslipidaemia, obesity, …..)
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Life time Risk of Hypertension in
normotensive women and men aged 65 years
Risk of Hypertension %
Risk of Hypertension %
100
100
Women
80
80
60
60
40
40
20
20
0
0
2
4
6
8
10
12
14
16
18
20
0
Men
0
2
Years to Follow-up
4
6
8
10
12
14
16
18
20
Years to Follow-up
JAMA 2002:297:1003-10. Framingham data.
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Types & Complications
of Hypertension
Types of hypertention, 2007, USA
Essential *
92.0-95.0 %
Secondary
Chronic kidney disease
3.0-6.0 %
Renovascular disease
0.2-1.0 %
Pheochromocytoma
0.1-0.2 %
Aldosteronism
0.1-0.3 %
Cushing’s syndrome
0.1-0.2 %
Coarctation
0.1-0.2 %
Oral contraceptives
0.2-1.0 %
* Onset in 30s and 40s, gradual onset, family history, obesity
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Complications of Hypertension:
Hypertension
is a risk factor
TIA, stroke
LVH, IHD,
MI, HF
Peripheral vascular
disease
Renal
failure
TIA = transient ischemic attack; LVH = left ventricular hypertrophy; CHD = coronary
heart disease; MI = myocardial infarction; HF = heart failure.
Cushman WC. J Clin Hypertens. 2003;5(Suppl):14-22.
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Assessment & Diagnosis
Auscultatory method of
blood pressure measurement
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Nokolai Korotkoff, 1905
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Noninvasive Blood Pressure Measurement
Methodologies
-
Auscultatory (K sound)
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Mercury
Aneroid
- Oscillometric
Locations
Situations
- Upper arm
- Wrist
- Finger
- Clinic
- Home
- Ambulatory
Definitions and Classification of blood pressure
The Task Force for the Management of Arterial Hypertension of the European Society of
Hypertension (ESH) and of the European Society of Cardiology (ESC), 2007
Systolic
Optimal
Normal
High normal
Grade 1 HTN
Grade 2 HTN
Grade 3 HTN
Isolated Systolic HTN
<120
120–129
130–139
140–159
160–179
180
≥140
Diastolic
and
<80
and/or 80–84
and/or 85–89
and/or 90–99
and/or 100–109
and/or
110
and
<90
Prevention & Control
Primary Prevention – Population Strategies 1
◘ Reduce sodium intake
◘ Healthy diet: high in fresh fruits, vegetables, low fat dairy products,
dietary and soluble fiber, whole grains and protein from plant
sources, low in saturated fat, cholesterol and sodium.
◘ Regular physical activity: 30-60 minutes of moderate intensity
cardiorespiratory activity (e.g. a brisk walk); 5-7 days/week
in addition to routine activities of daily living
◘ Low risk alcohol consumption (≤2 standard drinks/day and less than
14/week for men and less than 9/week for women)
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Primary Prevention – Population Strategies
2
◘ Maintenance of ideal body weight (BMI 18.5-24.9 kg/m2)
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Waist Circumference
- EMR, Europe, Sub-Saharan African
- South Asian, Chinese
Men
<94 cm
<90 cm
Women
<80 cm
<80 cm
◘ Prevention / cessation of tobacco use
Health Education
Behavioral change
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Primary Prevention- High Risk approach
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Tracking of blood pressure from childhood, in
high risk families
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Secondary prevention
Timely diagnosis and adequate control of BP
Compliance with treatment
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Indications for Pharmacotherapy
Usual blood pressure threshold values for initiation of
pharmacological treatment of hypertension *
Condition
Initiation
SBP or DBP mmHg
• Systolic or Diastolic
hypertension
140/90
• Diabetes
• Chronic Kidney Disease
130/80
* Seventh Report of the Joint National Committee on Prevention, Detection,
Evaluation, and Treatment of High Blood Pressure (JNC 7) EXPRESS
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BENEFITS OF LOWERING
BLOOD PRESSURE
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The Clinical Trials had shown:
Reduction in • STROKE
• MI
35 – 40 %
20 – 25 %
• HEART FAILURE > 50%
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Conclusion
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ASSESS AND MANAGE CV RISK IN HYPERTENSIVES
 High dietary sodium intake, smoking, dyslipidemia,
dysglycemia, abdominal obesity, unhealthy eating, and physical
inactivity.
LIFESTYLE MODIFICATION
 Sustained lifestyle modification is the cornerstone for the
prevention and control of hypertension and the management
of cardiovascular disease. Encourage patients to reduce their
sodium intake.
TREATING TO TARGET BP
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Treat blood pressure to less than <140/90 mmHg.
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In people with diabetes or chronic kidney disease target to
<130/80 mmHg and more than one drug is usually required
including diuretics to achieve BP targets.
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Global initiatives:
World Health Day 2013
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Local hypertension initiatives
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Saudi societies working in the hypertension field:
 Saudi hypertension management society
 Saudi heart association
Related databases:
 HEARTS database: http://www.heartsksa.com/home.html
 SPACE registry project in Saudi Arabia:
http://www.space-ksa.com/
 Saudi Hypertension management guidelines
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References 1
1.
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4.
5.
The Seventh Report of the Joint National Committee
on Prevention, Detection, Evaluation, and Treatment
of High Blood Pressure 2003
Saudi Hypertension Management Guidelines
The British Hypertension Society. NICE Guidelines
Franklin S. Epidemiology of hypertension. UC Irvine
The Canadian Hypertension Education Program:
Recommendations for management of hypertension,
2006
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References 2
6.
7.
8.
9.
Treatment of hypertension in the prevention and
management of Ischemic Heart Disease. American
Heart Association, 2007
European guidelines for management of arterial
hypertension 2007
Saad H. Hypertension updates, 2010
International societies: American Heart Association;
Heart & Stroke Foundation of Canada; British Heart
Foundation; European Society of Cardiology, World
Health Organization (www.who.int); Centers for
disease control and prevention. www.cdc.gov
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