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Sunday June 23, 2013
Landmark clinical guidelines introduced at Europe’s biggest blood pressure conference in Milan.
LIFESTYLE factors, lack of awareness by both patients and physicians, hesitancy in initiating and intensifying drug treatment, and healthcare structural deficiencies are amongst the reasons for the increasing problem of high blood pressure in Europe, according to new joint guidelines issued a few days ago by the European Society of Hypertension (ESH) and the European Society of Cardiology (ESC).
The guidelines, which recommend several significant changes to hypertension treatment, were launched at the European Society of Hypertension congress in Milan, Italy (which took place from June 14 to 17, 2013), with simultaneous online publication in the peer-reviewed journals Journal of Hypertension, the European Heart Journal, and Blood Pressure.
First produced in 2003, the original version of the joint ESH/ESC guidelines for the management of arterial hypertension became one of the most highly-cited medical papers in the world. The 2013 guidelines – which replace the 2007 edition – give state of the science recommendations which show how the hypertension landscape has changed, and indicate what needs to be done to reduce mortality and morbidity from high blood pressure and associated conditions.
Hypertension has been described as “the leading global risk for mortality in the world”. It continues to affect between 30 and 45% of the European population. The authors of the guidelines express disappointment that this figure has remained high since the 2003 edition. “We really need to raise awareness of the condition,” said Professor Giuseppe Mancia. “This is a condition that can be controlled if treated properly.”
According to the report, “lifestyle changes are the cornerstone for the prevention of hypertension”, including reduction of salt (to roughly half present levels) and alcohol, as well as maintaining a healthy body weight, regular exercise, and the elimination of smoking.
Additionally, patients and doctors must be aware that once hypertension has developed, it can be treated with drug therapy.
The guidelines highlight the lack of awareness of the potential problems of hypertension amongst patients, with poor long-term adherence to treatment, and the “inertia” of doctors, who don’t take appropriate action when confronted with patients with uncontrolled blood pressure.
The authors state that “despite overwhelming evidence that hypertension is a major cardiovascular risk, studies show that many are still unaware of the condition, that target blood pressure levels are seldom achieved”.
They also note that there are wide variations in hypertension care in Europe, but that team-based care, with greater nurse involvement, has a better record of success than more standard care.
The 2013 Task Force reviewed all relevant data since the last revision (in 2007), with 18 specific diagnostic and therapeutic areas identified as containing significant change.
A major development is the decision to recommend a single systolic blood pressure target of 140 mmHg for almost all patients. This contrasts with the 2007 version which recommended a 140/90 mmHg target for moderate to low risk patients, and 130/80 mmHg target for high risk patients. “There was not enough evidence to justify two targets,” said Professor Robert Fagard (Leuven, Belgium).
Other changes include:
*An increasing role for home blood pressure monitoring, alongside ambulatory blood pressure monitoring.
*A greater emphasis on assessing the totality of risk factors for cardiovascular and other diseases. For example, most people with hypertension also have additional risk factors such as organ damage, diabetes, and other cardiovascular risk factors. These need to be considered together before initiating treatment, and during the follow-up.
*Special emphasis on specific groups, e.g. diabetics, the young, the elderly, and drug treatment of the over 80s. Women are also considered separately, e.g. during pregnancy. Special consideration is given to new treatments such as renal denervation for resistant hypertension – which is described as “promising”, although more trials are called for.
*New guidance on how and when to take anti-hypertensive drugs. The report indicated no treatment for high normal blood pressure, no specific preference for single drug therapy, and an updated protocol for drugs taken in combination.
The guidance takes a liberal attitude to choice of first step drugs, noting the evidence that the beneficial effect of hypertension depends largely on blood pressure lowering.
Rather than presenting a hierarchy of drugs (a generic first, second, third choice and so on), the approach taken promotes individualised treatment, i.e. to help physicians decide which drugs to give in which clinical/demographic condition.
The guidelines were developed over an 18 month period. Task Force members from both societies met several times to finalise the content, which was reviewed twice by a group of 40 European reviewers in addition to the internal reviewers.
Commenting, Professor Mancia, ESH Co-Chairperson of the Guidelines Task Force, said: “This is certainly the most important current overview to consider the totality of hypertension treatment; it will form the basis of hypertension care for the foreseeable future.
“The WHO has already recognised hypertension as the leading global risk for mortality in the world, and as we identified in the document, the public needs to be more aware of just how common hypertension is. Not only that, doctors and patients need to recognise that we have good treatments which can control hypertension”.
Professor Fagard, ESC Co-Chairperson of the Guidelines Task Force, commented: “We are very happy to publish these comprehensive evidence-based guidelines. It’s the right time to carry out this revision, as we are able to include many significant studies and many new results since the previous version. We have included many of the gold standard randomised controlled trials (RCT) studies, but at the same time, we have graded all the evidence so that clinicians can see how strong the evidence base is for each recommendation. The important thing now is for physicians put these recommendations into use”.
The full Guidelines is available for downloading at http://www.escardio.org/guidelines-surveys/esc-guidelines/Pages/arterial-hypertension.aspx.
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