A recent research study conducted on Mount Everest determined that high altitudes cause blood pressure to rise.

A group of scientists followed 47 climbers up Mount Everest to observe and record changes in the climbers' blood pressure.

The participants were made to wear blood pressure monitors that regularly gave readings. The individuals also gave blood samples for testing.

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The climbers were split into two groups and arbitrarily given either medication to lower blood pressure or a placebo.

Both climbers and researchers climbed to a base camp located 5,400 meters above sea level.

What scientists found was that as climbers walked higher up the mountain, their blood pressures increased as well. At the highest point of the climb, systolic figures were up an average of 14 mmHg and diastolic numbers increased to an average of 10 mmHg in 24 hours.

They also discovered the blood pressure of the group given the blood pressure drug, telmisartan, also rose. The drug, which was effective at sea level, did not work at high altitudes.

The increase in blood pressure is believed to be related to oxygen deprivation at high altitudes.

The body reacts to the lack of oxygen by activating the sympathetic branch of the nervous system. This reaction caused the climbers to work hard, raising their blood pressure. Also, peripheral blood vessels constrict as a reaction to the pressure.

According to Gianfranco Parati, head of the research team, the study's findings could potentially have an effect on the management and treatment of chronic illnesses related to lack of oxygen.

The findings will also serve as warning that can be heeded by those with blood pressure issues who plan on going to high altitude areas.

These chronic diseases include chronic obstructive pulmonary disorder, chronic heart failure, chronic sleep apnea and even severe obesity.