1.   Several years ago there was much interest in the finding of an apparently abnormal basal electrical rhythm in irritable bowel syndrome.

2.   Bill Bradley Friday disclosed that he had experienced another erratic heart rhythm this week, his fifth episode since he sought medical care in December for an abnormal rhythm.

3.   Bradley said, noting that caffeine is seen as a possible contributor to his abnormal rhythms.

4.   But one morning, a day before he was to be discharged, his heart went into an abnormal rhythm that impaired its ability to pump.

5.   However, certain conditions can set off an abnormal cardiac rhythm, resulting in fainting spells, dizziness, palpitations, seizures or sudden death.

6.   Now they were stimulating her heart electrically, to test for abnormal rhythms.

7.   The abnormal rhythm causes clots to form in the upper chambers of the heart, which then can move to the brain and cause strokes.

8.   A pacemaker is a battery-driven device that senses the beating rhythm of the heart and sends an electrical jolt to heart muscles to correct any abnormal rhythm.