INDIANAPOLIS - An Indianapolis woman has sued American Airlines, claiming flight crew failed to take proper emergency measures when her husband had a fatal heart attack.

Taisuke Matsuo, who had no history of heart problems, suffered the attack while he was in a toilet cubicle on a flight from Japan to Indianapolis in 2005, The Indianapolis Star reported.

Carolyn Watts' lawsuit claims negligence contributed to her husband's death.

Large commercial airliners operating in the United States are required to carry defibrillators and to train crew members in emergency medical care. American Airlines refused to comment on the details of the lawsuit, but said its employees have used defibrillators to save 76 lives in the past 10 years.

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