assessment of cardiovascular risk 2.ppt [read-only] · assessment of cardiovascular risk ......
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ASSESSMENT OF ASSESSMENT OF CARDIOVASCULAR RISKCARDIOVASCULAR RISK
M MOHSEN IBRAHIM , MDCARDIOLOGY DEPARTMENT-CAIRO UNIVERSITY
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Adapted from Levy et al, Textbook of Cardiovascular Medicine, 19Adapted from Levy et al, Textbook of Cardiovascular Medicine, 1998 98
The Complications of CAD Often Emerge without The Complications of CAD Often Emerge without WarningWarning
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• 50 Y/O woman• Non-smoking• BP: 170/100 mmHg• Total cholesterol : 228
mg/dL• HDL-C : 46 mg/dL• Non-diabetic
• Chance of major CV event in the next 5 years : 6 %
• 60 Y/O male• Smoker• BP: 170/100 mmHg• Total cholesterol : 228
mg/dL• HDL-C : 38 mg/dL• Non-diabetic
• Chance of major CV event in the next 5 years : 30 %
ASSESSMENT OF CARDIOVASCULAR RISK
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• DEFINITIONSDefinition of RiskRisk Factors
• METHODSRisk ScoreRisk Charts
• IMPLICATIONSInitiation of Pharmacologic Therapy
ASSESSMENT OF CARDIOVASCULAR RISK
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RISK OF WHAT ?
ENDPOINTS
ASSESSMENT OF CARDIOVASCULAR RISK
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RISK OF WHAT ?
HARD END POINTSHARD END POINTS
• TOTAL MORTALITY
• TOTAL CVD MORTALITY
• CORONARY MORTALITY
FATAL MI
SUDDEN CARDIAC DEATH
• NONFATAL MI
• RESUSCITATED CARDIAC ARREST
• STROKE
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DEFINITION OF CORONARY HEART DISEASE - FRAMINGHAM
• TOTAL CHDAngina pectorisMyocardial infarction –recognized & unrecognizedUnstable anginaCHD death
• HARD CHDMyocardial infarctionUnstable anginaCHD death
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RISK OF WHAT ?SOFTSOFT END POINTSEND POINTS
• UNSTABLE ANGINA• CABG• PTCA• TOTAL DAYS OF HOSPITALIZATION• WORSENING ANGINA• TIME TO FIRST ISCHEMIC EVENT
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RISK OF WHAT ?
SURROGATE END POINTSSURROGATE END POINTS
• CORONARY ART DISEASE PROGRESSIONCoronary angiographyIVUSMRIUFCT (quantitative assessment of coronary calcium)
• VASCULAR ENDOTHELIAL FUNCTION
• INFLAMMATORY MARKERSCAMs , hsCRP
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RISK ESTIMATES
• ABSOLUTE RISKProbability of developing CHD or CV death over
given time period e.g. the next 10 years
• RELATIVE RISKThe ratio of the absolute risk of a given patient (or
group) to that of a lower risk group :- Average risk - Low risk
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DEFINITION OF A LOW-RISK STATEFramingham
• SERUM TOTAL CHOLESTEROL 160 TO 199
mg/dl. LDL-C 100 TO 129 mg/dl
• HDL-C >45 mg/dL IN MEN AND >55 mg/dL IN
WOMEN
• BLOOD PRESSURE <120 mmHg SYSYOLIC AND
<80 mmHg DIASTOLIC
• NONSMOKER
• NO DIABETES MELLITUS
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CARDIOVASCULAR RISK CARDIOVASCULAR RISK FACTORSFACTORS
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• INDEPENDENT – CAUSATIVE
• CONDITIONAL
• PREDISPOSING
• SUSCEPTIBILITY
• ESTABLISHED - EMERGING
• PROATHEROGENIC – PROTHROMBOTIC
--------------------------------------------------------------------------------------
• MODIFIABLE – NONMODIFIABLE
CATEGORIES OF CATEGORIES OF CARDIOVASCULAR RISK FACTORSCARDIOVASCULAR RISK FACTORS
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CARDIOVASCULAR RISK FACTORS
CHARACTERISTICS OFA MAJOR-CAUSATIVE RISK FACTOR
• INDEPENDENCE OF CONTRIBUTION FROM OTHER RISK FACTORS
• QUANTITAVE CONTRIBUTION TO RISK
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•Age •Gender•Family history•Established CVD Dis
•Cigarette Smoking•Hypertension•Hypercholesterolemia•Low HDL-Cholesterol•Obesity•Diabetes Mellitus•Hypertriglyceridemia•Sedentary Life-Style
MODIFIABLE
NON-MODIFIABLE •↑ Homocysteine•↑ Lp (a)•↑ Small, dense LDL-Cholest•Other lipid disorders•Abnormalities in blood coagulation
– ↑ Plasma fibrinogen– ↑ Coagulation factors: V, VII, VIII– Platelets abnormalities– Impaired fibrinolysis: ↑ PAI-1
•Inflammatory markers– C-Reactive protein– Interlukin
•Short stature•Impaired glucose tolerance•Increased oxidative stress•Personality type•Tachycardia•Ethnic group•S.creatinine
Independent / Established/Major Dependent / Emerging/Novel
CARDIOVASCULAR RISK FACTORSCARDIOVASCULAR RISK FACTORS
M M Ibrahim 2003
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Relative Risk of Future Myocardial Infarction
0 1.0 2.0 4.0 6.0
fibrinogen
sICAM-1
interleukin-6
hs-CRP
hs-CRP + TC:HDL
Novel Risk Factors
Ridker et al NEJM,2000
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• Plasma Myeloperoxidase
• Red Cell Glutathione Peroxidase 1 Activity
Ultra-Novel Risk Factors2003
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•Red Cell Glutathione Peroxidase 1 ActivityBlankenberg et al. NEJM; October 23, 2003
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PREVALENCE OF CONVENTIAL RISK FACTORS (%) IN CHD : MI/UA/PCI
Women Menno 345 89 87869
Age (y) 66.1 59.9
Current smoking 29.5 41.6
Diabetes 23.2 15.3
Hyperlipedemia 39.6 34.1
Hypertension 55.9 38.4
No risk factors 15.4 19.4Khot et al. JAMA- 2003
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“80 % 0f CAD are preventable by interfering with Cardiovascular Risk Factors”
AHA Meeting , New Orleans - 2000
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METHODS OF ASSSESSMENT OF RISKo Global Risk Scoreo Risk Charts
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ABOLUTE RISK
METHODS
Calculate The Number Of Points For Each Risk Factor
Estimate Global Risk Score ( Sum Of Points )
Consult Coronary/CV Risk Chart
Assess 10-years Asolute Risk Level For CHD or CV event
ASSESSMENT OF
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GLOBAL RISK ASSESSMENT SCORING SYSTEMS
• FRAMINGHAM Scoring System
• PROCAM Scoring System
• SCORE Project
• INDIANA Project
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GLOBAL RISK ASSESSMENT SCORINGFRAMINGHAM RISK FACTORS
• AGE ,y
• TOTAL CHOLESTEROL ( OR LDL-C ) , mg/dL
• HDL- C , mg/dL
• SYSTOLIC BLOOD PRESSURE , mmHg
• DIABETES
• SMOKER
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Risk PointsRisk FactorMen Women
Age, y<34 -1 -935-39 0 -440-44 1 045-49 2 350-54 3 655-59 4 760-64 5 865-69 6 870-74 7 8
FRAMINGHAM Scoring System
Risk PointsRisk FactorMen Women
Total Cholesterol<160 -3 -2169-199 0 0200-239 1 1240-279 2 2> 280 3 3
Risk PointsRisk FactorMen Women
Systolic blood pressure, mm Hg
<120 0 -3
120- 129 0 0
130 -139 1 1
140 -159 2 2
>160 3 3
Diabetes
No 0 0
Yes 2 4
Smoker
No 0 0
Yes 2 2
Risk Factor Risk Points
Men Women
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Global Risk Assessment Scoring
Risk PointsRisk FactorMen Women
HDL Cholesterol , mg/dl
<35 2 5
35-44 1 2
45-49 0 1
50-59 0 0
> 60 -2 -3
Source: Framingham Heart Study
FRAMINGHAM Scoring System
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Adjusted FRAMINGHAM Scoring SystemPlasma Glucose, mg/dl
Global Risk Assessment Scoring
42>126
21110-126
00< 110
WomenMen
Risk Points
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Global Risk Assessment Scoring
Adding up the points
Age ------------------------------------------------------
Cholesterol ---------------------------------------------
HDL-C --------------------------------------------------
Blood pressure -----------------------------------------
Diabetes -------------------------------------------------
Smoker --------------------------------------------------
Total points ---------------------------------------------Source: Framingham Heart Study
FRAMINGHAM Scoring System
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Risk Corresponding to Total Points
Probability Probability Probability pts. 10 yrs pts 10 yrs pts 10 yrs
≤ 1 < 2% 12 7% 23 23%2 2% 13 8% 24 25%3 2% 14 9% 25 27%4 2% 15 10% 26 29%5 3% 16 12% 27 31%6 3% 17 13% 28 33%7 4% 18 14% 29 34%8 4% 19 16% 30 39%9 5% 20 18% 31 40%
10 6% 21 19% 32 44%11 6% 22 21%
FRAMINGHAM Scoring System
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Interaction With Other Risk Factors
Smoking increases risk x 2 → 3
Hypertension increases risk x 2 → 3
LVH increases risk x 2
LV strain pattern increases risk x 2 → 3
Diabetes increases risk x 1.5 → 2
ASSESSMENT OF CARDIOVASCULAR RISK
FRAMINGHAM Scoring System
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all risk factors + diabetes = 47.9%all risk factors + diabetes = 47.9%
Smoking Smoking HypertensionHypertension(185/100mmHg)(185/100mmHg)
HyperlipidaemiaHyperlipidaemia(TC:HDL=8)(TC:HDL=8)
17.7%17.7%18.3%18.3%
24.5%24.5%
33.3%33.3% 32.5%32.5%
25.5%25.5%
5959 year old man, nonyear old man, non--smoker, BP 140/85mmHg, smoker, BP 140/85mmHg, TC:HDL = 4 TC:HDL = 4
10 year risk of CHD event = 11.9%10 year risk of CHD event = 11.9%
41.9%41.9%
INFLUENCE OF RISK FACTORS ON RISK OF CHD
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Risk Categorization
Low risk = < 15 percent
Medium risk = 15-20 percent
High risk = 20-30 percent
Very high risk > 30 percent
Typical 10 year risk of stroke or myocardial infarction
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all risk factors + diabetes = 21.7%all risk factors + diabetes = 21.7%
Smoking Smoking HypertensionHypertension(185/100mmHg)(185/100mmHg)
HyperlipidaemiaHyperlipidaemia(TC:HDL=8)(TC:HDL=8)
7.8%7.8%5.0%5.0%
2.8%2.8%
5.1%5.1% 8.0%8.0%
13.8%13.8%
5959 year old man, nonyear old man, non--smoker, BP 140/85mmHg, smoker, BP 140/85mmHg, TC:HDL = 4 TC:HDL = 4
10 year risk of stroke = 2.8%10 year risk of stroke = 2.8%
14.1%14.1%
INFLUENCE OF RISK FACTORS ON RISK OF STROKE
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LIMITATIONS
• DOES NOT ACCOUNT FOR OTHER ESTABLISHED MAJOR
RISK FACTORS e g Hypertriglyceridemia, Obesity, Physical
Inactivity , Family History
• DOES NOT ACCOUNT FOR SEVERE ABNORMALITIES OF
RISK FACTORS
• ABSOLUTE RISK IN TYPE 2 DIABETES EXCEEDS
FRAMINGHAM SCORE
• ?APPLICATION TO OTHER POPULATIONS
FRAMINGHAM GLOBAL RISK ASSESSMENT SCORING
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PROCAM Scoring System - 2002
GLOBAL RISK ASSESSMENT SCORING
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•PROCAM Scoring SystemProspective Cardiovascular Munster Study
-5389 men aged 35 – 65 years
-10 years follow-up
-Major coronary event :
. Sudden cardiac death
. Definite fatal or nonfatal MI
GLOBAL RISK ASSESSMENT SCORING
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• Age , 35-39 040-44 645-49 11 50-54 1655-59 2160-65 26
• LDL cholesterol, mg/dl
<100 0100-129 5130-159 10160-189 14>=190 20
• HDL cholesterol, mg/dl<35 1135-44 845-54 5>=55 0
• Triglycerides, mg/dl<100 0100-149 2150-199 3>=200 4
• Systolic blood pressure, m m H g<120 0120-129 2130-139 3140-159 5>=160 8
• Diabetes m ellitusN 0 0Y ES 6
• M I in fam ily historyN o 0Y es 4
• Sm okerN o 0
Y es 8
Acute Coronary Events
PROCAM ScoreMean Estimated Risk
In 10 y(%)
0-20 0.721-29 1.629-37 3.338-44 6.845-53 13.554-61 26.3>61 49.9
PROCAM Scoring System
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SCORE Project - 2003
GLOBAL RISK ASSESSMENT SCORING
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GLOBAL RISK ASSESSMENT SCORING
•SCORE Project - 2003• Ten year risk of fatal cardiovascular disease• 205 178 persons• Separate estimation equations were calculated for CHD and for non-CHD and for high risk and low risk regions of Europe•Two estimation models based upon: Total cholesterol and TC/HDL-C ratio•High risk if 10-year risk of fatal CVD is more than 5%
Conroy et al. Eu Heart J : 2003
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Framingham vs SCORE
Framingham• Based on 5000 Americans• Predicts coronary event• Includes nonfatal events• Cannot be adjusted for
national variations
SCORE• Based on >200,000
Europeans• Predicts CVD• Restricted to fatal events• Can be customized using
national mortality statistics
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INDIANA Project -2001
GLOBAL RISK ASSESSMENT SCORING
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• 47 088 men and women from eight randomised controlled trials
• 5.2 years (mean) follow-up
• Risk score developed from 11 factors
• 5 years risk of death from CV disease, fatal CHD, fatal stroke and all cause mortality
INDIANA Project - 2001
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INDIANA Projct Scoring for Predicting Risk of Death from CVD, Pococket al. 2001
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INDIANA Project Scoring for Predicting Risk of Death from CVD,
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INDIANA Project Scoring for Predicting Risk of Death from CVD, Pococket al. 2001
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INDIANA Project Scoring for Predicting Risk of Death from CVD, Pococket al. 2001
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• Age is a particularly strong risk factor• Male sex carries an increased risk. Sex difference
narrows with age• Median age specific score for men is similar to
the median score for women 10 years older• Smoking contributes more in women and in
younger age groups• Total cholesterol is more important in men than in
women• Total cholesterol and SBP have similar predictive
strength in men
• Diabetes has more effect in women than in men
GLOBAL RISK ASSESSMENT SCORING
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0.21.2
31.7
48.6
24.2
34.9
0
10
20
30
40
50
60
MEN WOMEN
%
BEFORE 40AT 40 YAT 70 Y
RISK OF DEVELOPING CORONARY HEART DISEASE
LIFETIME RISK
Framingham
Lloid-Jones et al Lancet-1999
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HIGH RISK INDIVIDUALProbability of Developing a Fatal or Nonfatal MI =>20% in next 10 years
CHD Risk Equivalent
• Three or more major risk factors• High risk score• Established –clinical-
atherosclerotic disease• Very high level single risk factor
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CHD RISK EQUIVALENTS
• DIABETES
• CLINICAL ASO DISEASE– Abdominal Aortic Aneurysm– Peripheral Arterial Disease– Carotid Arterial Disease
• MULTIPLE RISK FACTORS ( CHD Risk in 10-y >20%)
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CLINICAL ASO DISEASERisk Comparison with General
Population
• MI : 5-7 fold of increased risk of recurrent MI
• Cerebrovascular disease : 2-3 fold increased risk of MI
• Peripheral vascular disease : 4-fold increased risk of MI
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IMPLICATIONSIMPLICATIONS
ASSESSMENT OF CARDIOVASCULAR RISK
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• IDENTIFCATION OF HIGH RISK INDIVIDUALS
• Intensive Life Style Modification
• Need To Initiate Pharmacologic Intervention
• Extent Of Risk Factors Correction
• INDICATIONS FOR NON-INVASIVE TESTING
IMPLICATIONS
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Symptomatic• Established CHD• Carotid art disease• Peripheral art disease• Abdominal aortic
aneurysm
Asymptomatic• Diabetes mellitus• Multiple major risk factors
(3 or more - absolute risk > 20% in 10 ys)
• Very high level single risk factor
HIGH RISK INDIVIDUALProbability of Developing a Fatal or Nonfatal MI
>20% in next 10 yearsCHD Risk Equivalent
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RISK FACTORS
0 - 1 MULTIPLE
NO SCORING
LEVEL OF RISK FACTOR
CHD RISK SCORE
10-Y RISK OF CHD
HIGH>20%
INTERMEDIATE10-20%
LOW<10%
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INITIATION OF DRUG THERAPYSINGLE vs MULTIPLE RISK FACTORS
Approaches 10 %CHD 10-y risk
•Severe single risk factor•Multiple RFs
Other Risk factors
> 110 mmHg100 - 110 mmHg+
DBP
> 180 mmHg160 - 180 mmHgSBP
>/= 190 mg/dL160-189 mg/dLLDL-C
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RISK CATEGORIZATION – NEED FOR PHARMACOLOGIC INTERVENTION
00 - ++++++DRUG
THERAPY
0-1 Risk Factor
– No need for
risk scoring
Multiple Risk
Factors - 2+
•CHD
•CHD Risk
Equivalents
<10%10-20%>20%CHD Risk in 10
years
LOWMODERATEHIGHRISK
CATEGORY
+ - +++ Intesity of pharmacologic intervention and risk factors reduction
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ELEVATED LDL CHOLESTEROLPharmacologic Therapy
In Absence of Other Risk Factors
LDL cholesterol >220 mg/dl Always Necessary
LDL cholesterol >=190 mg/dl Should be consideredExcept :-Young men (<35 y}-Premenopausal women
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RISK ASSESSMENT OFFICE
CLINICAL CVDCVDCVD
ASYMPTOMATIC
HIGH RISK INTERMEDIATE RISK
LOW RISK
INITIATE DRUG THERAPY ?NONINVASIVE TESTING FOLLOW UP
MYOCARDIAL ISCHEMIA SUBCLINICAL ASO
STRESS ECG
STRESS ECHO
PERFUSION IMAGING
Ankle/Brachial BP Index
Carotid B mode US-IMT
EBCT-Coronary Ca score
CRP, Endothelial function
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ASSESSMENT OF CARDIOVASCULAR RISK
In Asymptomatic Patient, To Treat Or Not To Treat
That’s The Question .
Whether To Initiate Drug Therapy Is Cost Effective .
Whether Drug Therapy Should Be Intensive
Risk Assessment Can Answer Many QuestionsIn Many Times Clinical Judgement Is the Choice,
But When Symptomatic There Is No Choice
but Secondary Prevention