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Resistant hypertension: Review for physicians

Date:
August 18, 2014
Source:
Canadian Medical Association Journal
Summary:
A new review article on resistant hypertension, which affects about one in 10 people with high blood pressure, is aimed at helping physicians assess and manage patients with the condition.

A new review article on resistant hypertension, which affects about 1 in 10 people with high blood pressure, is aimed at helping physicians assess and manage patients with the condition. The review, published in CMAJ (Canadian Medical Association Journal) includes information on emerging therapies for the condition.

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The authors note that high-quality evidence is lacking. "We found few randomized controlled trials (RCTs) and no systematic reviews to guide decision-making. Thus, we have made management recommendations based primarily on expert consensus unless otherwise specified," writes Dr. Raj Padwal, Department of Medicine, University of Alberta, with coauthors.

About 20% of Canadian adults have hypertension (high blood pressure.) Resistant hypertension is defined as blood pressure levels that exceed the target level despite treatment with three or more hypertension drugs. Obesity, especially a large waist circumference, and sleep apnea are the top contributing factors to resistant hypertension. Patients with resistant hypertension are at higher risk of heart disease and death.

Before treating patients for resistant hypertension, physicians must rule out "pseudoresistance." Elevated blood pressure during physician visits ("white coat effect"), not taking recommended medications and inaccurate blood pressure measurements can contribute to apparently resistant hypertension.

The review recommends structured approaches to managing this condition:

  • optimizing current medication regimen and strategies to improve adherence
  • counselling patients to reduce salt intake, limit alcohol, exercise and strive for a healthy weight
  • treating obstructive sleep apnea with continuous positive airway pressure
  • adding drugs when current drugs are not effective -- spironolactone, a-blockers, b-blockers and others
  • referring patients to clinics with hypertension specialists

The authors close by emphasizing the need for more rigorous studies in the field to address knowledge gaps and clarify uncertainties.


Story Source:

The above story is based on materials provided by Canadian Medical Association Journal. Note: Materials may be edited for content and length.


Journal Reference:

  1. R. S. Padwal, S. Rabkin, N. Khan. Assessment and management of resistant hypertension. Canadian Medical Association Journal, 2014; DOI: 10.1503/cmaj.130764

Cite This Page:

Canadian Medical Association Journal. "Resistant hypertension: Review for physicians." ScienceDaily. ScienceDaily, 18 August 2014. <www.sciencedaily.com/releases/2014/08/140818135118.htm>.
Canadian Medical Association Journal. (2014, August 18). Resistant hypertension: Review for physicians. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2014/08/140818135118.htm
Canadian Medical Association Journal. "Resistant hypertension: Review for physicians." ScienceDaily. www.sciencedaily.com/releases/2014/08/140818135118.htm (accessed October 31, 2014).

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