21.   Some patients experience abnormal heart rhythms that can lead to death if untreated.

22.   The doctors will stimulate the heart electrically, and possibly with drugs, to determine if they can induce an abnormal heart rhythm like sustained ventricular tachycardia.

23.   The monitor, made by Medtronic Inc. and called Reveal, functions like a tiny electrocardiograph and stores evidence of abnormal heart rhythms for later study.

24.   --The New England Journal of Medicine carried reports of six people who developed severe illnesses from herbal remedies, including lead poisoning, impotence and abnormal heart rhythms.

25.   This, in turn, increases the risk of dangerous abnormal heart rhythms and other complications.

26.   A drug commonly used for short-term treatment of worsening heart failure in hospitalized patients may cause dangerously low blood pressure and abnormal heart rhythms, researchers found.

27.   Despite his success, Barnard said the highlight of his career was quietly performing operations on children with abnormal hearts, where each operation required different techniques and skills.

28.   He said the highlight of his career was performing operations on children with abnormal hearts, each operation requiring different techniques and skills.

29.   He had told the other umpires that he was going to be treated Tuesday for arrhythmia, or abnormal heart beat.

30.   Previous studies have indicated that other types of antidepressants can cause abnormal heart rhythms in patients with heart problems.