Document Detail


A change in paradigm: Lowering blood pressure in everyone over a certain age.
MedLine Citation:
PMID:  22713146     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Abstract Dividing people into 'hypertensives' and 'normotensives' is commonplace but problematic. The relationship between blood pressure and cardiovascular disease is continuous. The Prospective Studies Collaboration analysis shows a continuous straight line dose-response relationship across the entire population down to blood pressure levels of 115 mmHg systolic and 75 mmHg diastolic, the confidence limits on the individual data points being sufficiently narrow to exclude even a minor deviation from a linear relationship. Meta-analysis of randomized controlled trials shows that blood pressure-lowering drugs produce similar proportional reductions in risk of coronary heart disease (CHD) and stroke irrespective of pre-treatment blood pressure, down to levels of 110 mmHg systolic and 70 mmHg diastolic. There are also now sufficient trial data to show a statistically significant risk reduction in 'normotensive' people without known vascular disease on entry. The straight line (log-linear) relationship means that the benefit derived from lowering blood pressure is proportional to existing risk, so the decision on whom to treat with blood pressure-lowering drugs should depend on a person's overall absolute risk irrespective of blood pressure. In primary prevention, basing treatment on age alone rather than overall absolute risk entails little loss of efficacy and may be preferred on the basis of simplicity and avoidance of anxiety in telling people they are at elevated risk.
Authors:
Malcolm Law
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annals of medicine     Volume:  44 Suppl 1     ISSN:  1365-2060     ISO Abbreviation:  Ann. Med.     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-06-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8906388     Medline TA:  Ann Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  S30-5     Citation Subset:  IM    
Affiliation:
Centre for Environmental and Preventive Medicine, Wolfson Institute of Preventive Medicine, Barts and The London, Queen Mary's School of Medicine and Dentistry , Charterhouse Square, London EC1M 6BQ , UK.
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