hypertension: what’s new since jnc 7 - american college ... · hypertension: what’s new since...
TRANSCRIPT
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Hypertension:What’s new since JNC 7Harold M. Szerlip, MD, FACP, FCCP, FASN, FNKF
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Disclosures
Spectral Diagnostics – Site investigatorEli Lilly – Site investigator
ACP – IM –ITE writing committeeNBME – Step 3 Acute Care committee
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U.S. HYPERTENSION GUIDELINES
1977 – JNC 1
1980 – JNC 2
1984 – JNC 3
1988 – JNC 4
1993 – JNC 5
1997 – JNC 6
2003 – JNC 7 (delayed waiting for ALLHAT)
20?? – JNC 8
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Systematic review, RCTs
cohort
Case control
Case series
Expert opinion
Evidence Hierarchy
More of This
And less of This
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JNC-WaitReport was completed over a year ago
Evidenced based
Unfortunately the existing evidence is not good
Stakeholders who review were not happy
NLHBI likely will give up guidelines and defer to societies
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Other Guidelines
Canadian 2011
British 2012
European 2013
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It’s tough to make predictions. Especially about the future
Yogi Berra
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FinallyJNC 8 --> AHA/ASH 2013 Hypertension Guidelines
To be presented next week at AHA MTG IN DALLAS
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What’s new since JNC 7How should we measure BP?
What are our BP goals?
Are there different BP goals for different populations?
What drugs should we used?
Are there other things we should measure?
Newer non-pharmacologic treatments
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Hypertension: 1988-2010
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Trends in Drug Treatment
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How should we measure Blood Pressure ?
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Korotkov 1905
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Question
In an observational study of BP measurement in various settings (office, hospital, skilled nursing facility, home health) what percentage of BP measurements were done according to the guidelines?
1. 60%2. 30%3. 10%4. 0%
Grim et al. Can J Cardiol 1995;11 (suppl H):38H-42H.
?
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Blood Pressure Measurement
How many errors of BP measurement do you see?
1. One2. Two3. Three4. Four5. Five6. Six
?
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BP TRUAutomated in-office device
Obtains a series of readings1st reading with clinician present5 additional readings at 1-5 min intervals
Drops the first reading
Usually 10 mm Hg less than office
More closely aligned with ambulatory monitoring than office BP
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Home Blood Pressure MonitoringCorrelates better with 24 hour ambulatory monitoringBetter predictor of end-organ damage than office BPEngages patient leads to better control
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Home Blood Pressure Monitoring
Need to train patientRecord 3 readings twice a day for 1-2 weeks
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Pickering T et al. N Engl J Med 2006;354:2368-2374
24 Hour Ambulatory Monitoring
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Blood Pressure Is Highly Variable Over a 24-Hour Period
18:00 22:00 02:00 06:00 10:00 14:00 18:00
Blo
od p
ress
ure
(mm
Hg)
Time of awakeningSleep
180
160
140
120
100
80
200
Systolic BP
Diastolic BP
Adapted from: Millar-Craig MW, et al. Lancet. 1978;15:795-797.
Time of day
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Ambulatory Blood Pressure Monitoring
Identifies White Coat and Masked HypertensionIdentifies symptomatic orthostasis
Best predictor of end-organ damageLack of nocturnal dipping increases CV risk
African-AmericansCKDDiabetes
Pressure load associated with CV riskExcessive variability associated with increased CV risk
Exaggerated early morning surge associated with increased CV risk
Allows you to tailor therapy
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Chronotherapy
Almirall J et al. Nephrol. Dial. Transplant. 2011;ndt.gfr557
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Prisant LM, Carr AA, et al. Am J Hypertens 1990;3:81-89
Ambulatory BP
Multiple OfficeBP
Single OfficeBP
Systolic 0.54 0.38 0.09
Diastolic 0.63 0.33 0.05
Correlation of Measurements to Echocardiographic Combined Wall Thickness
n=55
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What are Treatment goals?
< 140/90
No studies have shown a benefit to achieving lower levels (await results of Sprint Trial –2018)No studies have specifically evaluated treatment in patients with stage 1 HTN
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Are there Different Goals in Different Populations?
DiabetesUnderlying CV diseaseChronic Kidney DiseaseVery Elderly
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ACCORD Trial
The ACCORD Study Group. N Engl J Med 2010;362:1575-1585
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The ACCORD Study Group. N Engl J Med 2010;362:1575-1585
ACCORD Trial
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Primary Outcome Nonfatal MI, Nonfatal Stroke or CVD Death Total Stroke
HR = 0.8895% CI (0.73-1.06)
HR = 0.5995% CI (0.39-0.89)
NNT for 5 years = 89
ACCORD Trial
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ACCORD Trial
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Hypertension in Coronary Artery Disease and “High Risk” Groups
No Intent to Treat RCT addresses this
Lower Achieved BP has been associated with no benefit or worsened outcomes in post hoc analysis of trials
INVEST DM and CADONTARGET Vascular disease or DM NEJM 358:1547-1559I-PRESERVE Diastolic CHF
JAMA July 7,2010;304(1)61-68, NEJM 358:1547-1559
N Engl J Med 2008;359:2456–67
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CKD
MDRDAASK
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MDRD
Klahr S et al. N Engl J Med 1994;330:877-884.
MAP107 v 92
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AASK Trial
140/80128/78
JAMA. 2002;288(19):2421-2431
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AASK Trial Follow-up
Appel LJ et al. N Engl J Med 2010;363:918-929
140/80128/78
hazard ratio, 1.18; 95% CI, 0.93 to 1.50; P=0.16
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HYVETOnly HTN RCT in Patients ≥80 years
N=3850 mean age 83 mean SBP 173
Goal SBP<150, mean achieved SBP =143
Placebo vs perendipril/indapamide
18 month BP separation -15/6 mmHg
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What Drugs should we use?
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...
Jamerson K A et al. Hypertension 2011;57:174-179
ACCOMPLISH Trial
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β-Blockers (single action)
Less effective for BP loweringNo evidence for cardiovascular protectionPossibility of increase stroke risk
Relegated to 3rd line agentDuel Action β-blockers maybe different
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What about Combination ACE/ARB/Renin inhibitor
On-Target (ACE + ARB) Combination had worse outcome
VA Nephron-D (ACE + ARB) study halted for futility and adverse events
Altitude (Aliskerin + ACE or ARB) Trial halted secondary to increased CV event
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What Diuretic should I use
HCTZ 12.5/25 has not ben evaluatedIndapamide/Chlorthalidone more potent and have longer half lifeThese agents appear more effective (but unfair comparison)
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Combination medication
Combination pills are more convenientCombination pills tend to be more efficacious
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Aldosterone antagonists
Excellent for treatment of resistant hypertensionExcellent for treatment of hypertension in metabolic syndrome
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Drug treatment of Hypertension
ACE/ARB
Dihydropyridine
Diuretic (chlorthalidone/Indapamide)
Aldosterone antagonists
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Central Aortic Pressure
Nichols ww, Singh Bm. Curr Opin Cardiol 17:543, 2002
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London G M et al. Hypertension 2001;38:434-438
Relationship of Augmentation Index to Survival in ESRD
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The CAFE Investigators, et al. Circulation 2006;113:1213-1225
Cafe Study
-•- atenolol
- - amlodipine
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PULSE WAVE VELOCITY
A simple method to assess arterial stiffness and distensibility
A long-established and widely used technique
Non-invasive, accurate and reproducible
The faster the pulse wave the stiffer the artery
> 10 m/s increases CV risk
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Pulse Wave Velocity
For each 1 m/sec increase in PV there is a 10-14% increase in CV events
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Newer Therapy
Renal Nerve DenervationCarotid baroreceptor stimulation
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Simplicity HTN-2 TrialRenal denervation
Esler MD, et al Lancet 376:1903, 2010
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Simplicity HTN-2 TrialRenal denervation
Esler MD, et al Lancet 376:1903, 2010
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Carotid baroreceptor stimulation
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2
Carotid Stimulation
Alnima T et al.Journal of Hypertension. 30(8):1665‐1670, 2012.
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ConclusionsWe are doing a better jobAmbulatory BP monitoring better predictor of CV eventsTreatment goal < 140/90 in most populationsLowering BP is more important than the drugs we useMost patients will require 2 or more drugsACE/ARB + DihydropyrineConsider combinationsβ-blockers are third line treatmentsCombination Renin-angiotensin blockers are OUTAldosterone antagonists are excellent agentsThere are other measurements that may be usefulThere are new non-pharmacologic treatments