If the oxygen shortage is mild and brief, the person may suffer angina but no heart attack.

Then she began to suffer from oxygen shortage.

However, the sintering takes place in a specific atmosphere, for instance one with an oxygen shortage.

"Now you'll have to hold your breath to cross between tents, because there'll be an oxygen shortage," she warned.

This condition is a medical emergency that can cause steadily worsening oxygen shortage and low blood pressure.

These chemical processes in the muscle cells seem to become more tolerant of the perpetual oxygen shortage.

This can be defined as a state of circulatory collapse which leads to low arterial blood pressure and oxygen shortage in the tissues.

The main engineering challenge, aside from oxygen shortages, is the weakness of the permafrost.

Studies concluded that 10 percent or fewer of cases could be traced to an oxygen shortage at birth.

In fact, he said, oxygen shortage, or hypoxia, causes a temporary euphoria.