The associated press reported the death of a female passenger aboard an American Airlines flight this past week. The woman had both heart disease and diabetes according to the medical examiner. These are both risk factors for a heart attack.

The passenger initially complained of shortness of breath and quickly became unresponsive. Attempts by the flight crew and several medical personnel aboard the plane were unsuccessful in reviving her. Oxygen and an automated external defibrillator (AED) were used in the attempt to save her. Per the media reports, the AED did not detect a rhythm that could be shocked.

Airplanes are required to carry oxygen tanks to be used for cabin pressure changes and medical emergencies. Many airplanes also carry an AED.

If you have heart or lung problems discuss with your doctor the risks of flying. These can include lower oxygen levels in the airplane’s cabin. Portable oxygen is made available by many airlines if arranged ahead of time.