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Mark Huffman, MD, MPHNorthwestern University Feinberg School of Medicine
Northwestern Memorial Hospital Healthy Transitions
21 November 2013
Blood Pressure Management & Cardiovascular Health
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Blood Pressure Management & Cardiovascular Health
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• Normal vs. optimal blood pressure: does it make a difference?
• Raised blood pressure (hypertension) rates: Global, US, Cook County, and Chicago
• Diagnosis and evaluation of hypertension
• Management options: 2013 AHA/ACC/CDC guidelines
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Blood Pressure Management & Cardiovascular Health
3
• Normal vs. optimal blood pressure: does it make a difference?
• Raised blood pressure (hypertension) rates: Global, US, Cook County, and Chicago
• Diagnosis and evaluation of hypertension
• Management options: 2013 AHA/ACC/CDC guidelines
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Normal vs. Optimal
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Q1: What is a normal blood pressure?
Q2: What is an optimal blood pressure?
Q3: What was FDR’s blood pressure in 1945?
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Normal vs. Optimal
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Q1: What is a normal blood pressure?
“Normal” describes the bell-shaped distribution of a continuous measure, such as blood pressure within a population.
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Blood Pressure Curves, US Women (2001-2008)
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Wright J, et al. NCHS 2011.
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Average US Blood Pressure, Men
Wright J, et al. NCHS 2011.
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Average US Blood Pressure, Women
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Wright J, et al. NCHS 2011.
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Observed SBP and Prevalence of BP Lowering Therapy (UK)
Wills AK, et al. PLoS Med 8(6): e1000440.
Men Women
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Normal vs. Optimal
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Q1: What is a normal blood pressure?
Q2: What is an optimal blood pressure?
Q3: What was FDR’s blood pressure in 1945?
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Normal vs. Optimal
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Q2: What is an optimal blood pressure?
“Optimal” describes the blood pressure that is associated with the greatest health outcomes, such as low rates of heart disease, strokes, or heart failure.
(What is it? And over what time period?)
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Optimal Blood Pressure ~115/75
12Lewington S, et al. Lancet 2002;360: 1903–13.
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Age-Dependent? U-shaped Curve
13Denardo S, et al. Am J Med 2010;123:719–26.
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Normal vs. Optimal
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Q1: What is a normal blood pressure?
Q2: What is an optimal blood pressure?
Q3: What was FDR’s blood pressure in 1945?
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Normal vs. Optimal
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Signs and Symptoms of Malignant Hypertension
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Evidence of end-organ damage:
• Blurred vision (eyes)• Headache (brain)• Chest pain (heart)• Shortness of breath, especially when lying down (heart)• Kidney damage (kidneys)
The rate of change in blood pressure tends to be more important than the absolute level due to the body’s ability to auto-regulate one’s blood pressure.
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Blood Pressure Management & Cardiovascular Health
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• Normal vs. optimal blood pressure: does it make a difference?
• Raised blood pressure (hypertension) rates: Global, US, Cook County, and Chicago
• Diagnosis and evaluation of hypertension
• Management options: 2013 AHA/ACC/CDC guidelines
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Global Blood Pressure
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2008 global average adult blood pressureMen: 128.1 mmHg (126.7, 129.4)Women: 124.4 mmHg (123.0, 125.9)
Between 1980 and 2008, the average blood pressure decreased each decade by:
0.8 mmHg for men 1.0 mmHg for women
Danaei G, et al. Lancet 2011; 377: 568–77.
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Danaei G, et al. Lancet 2011; 377: 568–77.
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US, Cook County, and Chicago Estimates of Hypertension:
Institute for Health Metrics & EvaluationChicago Health Atlas
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Blood Pressure Management & Cardiovascular Health
22
• Normal vs. optimal blood pressure: does it make a difference?
• Raised blood pressure (hypertension) rates: Global, US, Cook County, and Chicago
• Diagnosis and evaluation of hypertension
• Management options: 2013 AHA/ACC/CDC guidelines
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How is Hypertension Diagnosed?
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“The diagnosis of hypertension should be based on at least 3 different BP measurements, taken on 2 separate office visits to account for the natural variability of BP and other factors that can affect BP.
“To confirm the validity and reliability of the measurement, at least 2 measurements should be obtained once the patient is comfortable and settled for at least 5 minutes. BP should be measured in the sitting position with the back supported, feet on the floor, arm supported in the horizontal position, and the BP cuff at heart level.”
Aronow WS, et al. Circulation 2011; 123:2434-2506.
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How is Hypertension Diagnosed?
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• Home blood pressure measurements are increasingly preferred as adjuncts to those taken in the doctor’s office.
• Automatic sphygmomanometers work well; Omron, upper arm cuffs are preferred ($45-$65 on amazon.com) and are often covered by insurance.
myamericanheart.org
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How is Hypertension Evaluated?
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• Home blood pressure measurements are increasingly preferred as adjuncts to those taken in the doctor’s office.
• Check your BP right after you get up in the morning (consistency helps reduce the number of variables).
• On occasion, your doctor might ask you to wear a blood pressure cuff throughout an entire 24 hour period (ambulatory blood pressure monitoring) to check you blood pressure throughout the day.
• You can enter via MyChart to share with your blood pressure with your doctor.
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How is Hypertension Evaluated?
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Blood Pressure Management & Cardiovascular Health
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• Normal vs. optimal blood pressure: does it make a difference?
• Raised blood pressure (hypertension) rates: Global, US, Cook County, and Chicago
• Diagnosis of and evaluation hypertension
• Management options: 2013 AHA/ACC/CDC guidelines
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Meta-Analysis: SHEP, Syst-Eur, Syst-China
All Mortality
CVMortality
CVEvents Stroke CHD
% R
isk
Red
uctio
n
-17% -25% -32% -37% -25%
...and 50% reduction in CHF in SHEP!
Staessen J, et al. Lancet 2000:355:865
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NNT for 5 Years to Prevent 1 Event(NNT=number needed to treat)
CV Event Stroke CHD
All patients 26 48 64
Men 18 34 44
Women 38 68 92
Age 60-69 39 99 89
Age 70+ 19 32 50
Staessen J, et al. Lancet 2000:355:865
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Hypertension in the Very Elderly Trial (HYVET)
International multicenter trial; participants were ≥80 years
Baseline SBP 160 to 199 mm Hg; target BP <150/<80 mmHg
Randomized to indapamide 1.5 mg vs. placebo; could receive perindopril (2 or 4 mg) or placebo
Primary outcome: Fatal or non-fatal stroke
Secondary outcomes: Total mortality, CVD death, cardiac death, stroke death, fatal/NF heart failure
NEJM 2008; 358:1887
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Hypertension in the Very Elderly Trial (HYVET)
3845 participants; baseline blood pressure=173/91 mmHg
Mean age = 83 years (range 80-105); 61% women; 12% with prior CVD
Mean duration of F/U: 2 years (0 to 6.5 years)
The trial was stopped early for significant reductions in primary endpoint and all-cause mortality
NEJM 2008; 358:1887
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BP 29.5/12.5
BP 14.5/6.8
NEJM 2008; 358:1887
Hypertension in the Very Elderly Trial (HYVET)
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17.7/1000 p-y
12.4/1000 p-y
30% RRR;NNT 94
over 2 years
NEJM 2008; 358:1887
Hypertension in the Very Elderly Trial (HYVET)
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59.6/1000 p-y
47.2/1000 p-y
21% RRR;NNT 40
over 2 years
NEJM 2008; 358:1887
Hypertension in the Very Elderly Trial (HYVET)
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2013 AHA/ACC/CDC Recommendations
35Go AS, et al. J Am Coll Cardiol 2013; Nov 12.
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2013 AHA/ACC/CDC Recommendations
36Go AS, et al. J Am Coll Cardiol 2013; Nov 12.
Systems-level approach to hypertension control, including:
1. Identifying all patients eligible for management 2. Monitoring at the practice/population level 3. Increasing patient and provider awareness 4. Providing an effective diagnosis and treatment guideline 5. Systematic follow-up of patients for initiation and intensification
of therapy 6. Clarifying roles of healthcare providers to implement a team
approach 7. Reducing barriers for patients to receive and adhere to
medications as well as to implementing lifestyle modifications 8. Leveraging the electronic medical record systems being
established throughout the US to support each of these steps
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Kaiser Permanente (2001-2009)
37Jafffe MG, et al. JAMA. 2013;310(7):699-705
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Lifestyle: Foundation of Management
38Go AS, et al. J Am Coll Cardiol 2013; Nov 12.
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Hypertension Treatment Algorithm
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Go AS, et al. J Am Coll Cardiol 2013; Nov 12.
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Medications: Certain Circumstances
41Go AS, et al. J Am Coll Cardiol 2013; Nov 12.
Especially for patients with multiple medical problems, pill boxes help increase adherence to blood pressure lowering medications by ~10%.
Only $5-$10 on amazon.com!
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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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Take Home Points: Management
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• Home BP monitoring is preferred method of diagnosis and evaluation of treatment.• Use an automated BP machine (upper arm cuff)• Sign up for MyChart BP log
• Lifestyle modification, particularly diet, can have a powerful effect on blood pressure.• Check out dashdiet.org for tips
• Combination pills are being increasingly used to improve blood pressure control.• Use a pillbox to make taking your meds easier
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Mark Huffman, MD, MPHNorthwestern University Feinberg School of Medicine
Northwestern Memorial Hospital Healthy Transitions
21 November 2013
Blood Pressure Management & Cardiovascular Health