I have just read an article about air travel and high blood pressure. I remember this topic coming up in a recent post.
According to this article, a review of current scientific evidence, published in the journal Heart last year, concluded that air travel is safe for most people with cardiovascular disease, providing the blood pressure or a heart problem is under control.
In some cases, air travel may not always be safe. Uncontrolled high blood pressure or heart failure can result in a build up of fluid in the lungs. People with these conditions should check with their doctors before flying. Planes are not pressurized to the sea level altitude, where the pressure is higher. Changes in air pressure during flight could affect people with such problems in the same way traveling to high elevations can. Sometimes blood clots can form in the legs in anyone without warning. It is recommended that people drink bottled water to stay well hydrated and avoid excessive alcohol during flight, which dehydrates.Wearing compression stockings and moving, stretching and doing leg exercises during the flight help keep the circulation in the legs going and reduce the risk of blood clot formation.