11.   Arrhythmia is the medical term for irregular heart beat.

12.   A heart beat that seems abnormally smooth and free of fractal variations may actually signal an impending heart attack, he found.

13.   A video camera was installed in the burrow to observe eye movement, and sensors recording brain activity, heart beat and other functions were attached to the animals.

14.   After undergoing surgery a few years ago to correct a rapid heart beat, he feels that both he and his dances have become serene.

15.   Bradley had never disclosed that for the past few years he had suffered an irregular heart beat, a common condition known as atrial fibrillation.

16.   But because the laser must be fired between heart beats, the timing is controlled by computer.

17.   But while the Impala has its charms, if it makes a middle-aged heart beat faster it may be time to see a cardiologist.

18.   Doctors may misdiagnose a certain type of irregular heart beat as a panic attack, particularly in women, new research suggests.

19.   Defibrillators use an electric shock to restart a stopped heart beat.

20.   Doctors gave him antibiotics to kill the bacteria and drugs to make his heart beat stronger.