Obstructive Sleep Apnoea (OSA) and Blood Pressure


October 10th 2017

Essentially, most medical experts are of the opinion that there is a connection between blood pressure and sleep apnoea. The U.S. National Heart, Lung and Blood Institute (a division of the National Institutes of Health) states in it’s definition of sleep apnoea that left untreated it can “increase the risk of high blood pressure,” whist also presenting a greater risk for obesity, stroke and heart attack.1

The Mayo Clinic states high blood pressure as a possible complication of sleep apnoea. They say that “sudden drops in blood oxygen levels that occur during sleep apnoea increase blood pressure and strain the cardiovascular system.” They also warn that “if you have obstructive sleep apnoea, your risk of high blood pressure (hypertension) is greater than if you don’t,” they also go onto link the severity of the sleep apnoea with that of the blood pressure.2

Our own NHS in the UK gives similar warnings about the link between the 2. saying on their web site that “Obstructive sleep apnoea (OSA) is associated with high blood pressure,” and that it’s “uncertain whether people develop hypertension as a direct response to OSA, or whether it is the result of an underlying cause of OSA, such as obesity.”3

Sleep apnoea and blood pressure: The research

The suggestion that high blood pressure and sleep apnoea are regularly found together are supported by a wide variety of medical studies. A study published in American Family Physician in 2002 is typical: “About one half of patients who have essential hypertension (hypertension without a known cause) have obstructive sleep apnoea, and about one half of patients who have obstructive sleep apnoea have essential hypertension.”4

A 2009 study published in the journal Hypertension Research also found that OSA “increases both daytime and night-time ambulatory blood pressures.” That study concluded that understanding the characteristics of a patient’s sleep apnoea “is essentially important” to achieve control over high blood pressure.5

So, what to do with this information? Chances are you may well be aware of the connection, but if not and if you suffer from OSA then be sure to discuss any concerns with your GP. Please discuss any medical advice with your doctor or equipment provider. If you have a specific product question, please contact the ResMed UK team


  1. National Heart, Lung, and Blood Institute (NHLBI). National Institutes of Health (NIH). “What Is Sleep Apnoea?” Retrieved from http://www.nhlbi.nih.gov/health/health-topics/topics/sleepapnea/ (accessed April 2, 2014).
  2. The Mayo Clinic. “Complications of sleep apnoea.” July 24, 2012. Retrieved from http://www.mayoclinic.org/diseases-conditions/sleep-apnea/basics/complications/con-20020286 (accessed April 2, 2014).
  3. National Health Service (UK). “Complications of sleep apnoea.” Retrieved from http://www.nhs.uk/Conditions/Sleep-apnoea/Pages/Complications.aspx (accessed April 2, 2014).
  1. Silverberg DS, Iaina A, Oksenberg A. “Treating obstructive sleep apnoea improves essential hypertension and quality of life.” Am Fam Physician. 2002 Jan 15;65(2):229-36. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/11820487 (accessed April 2, 2014).
  2. Kario K. “Obstructive sleep apnoea syndrome and hypertension: ambulatory blood pressure.” Hypertens Res. 2009 Jun;32(6):428-32. doi: 10.1038/hr.2009.56. Retrieved from http://www.ncbi.nlm.nih.gov/pubmed/19494815 (accessed April 2, 2014).

This blog post contains general information about medical conditions and treatments. It is not intended to be a substitute for professional medical advice, diagnosis or treatment. The information is not advice, and should not be treated as such. You must not rely on the information on this website as an alternative to medical advice from your doctor or other professional healthcare provider.

If you have any specific questions about any medical matter, you should consult your doctor or other professional healthcare provider. If you think you may be suffering from any medical condition, you should seek immediate medical attention. You should never delay seeking medical advice, disregard medical advice, or discontinue medical treatment because of information on this website. The views expressed on this blog and website have no relation to those of any academic, hospital, practice, or other institution with which the authors are affiliated and do not directly reflect the views of ResMed or any of its subsidiaries or affiliates.