51.   It then proceeds to measure everything from her blood pressure to her heart rhythm.

52.   Ketosis can also damage the kidneys, cause bad breath and trigger irregular heart rhythms that can cause sudden death.

53.   Last summer, a defibrillator was implanted in his chest, because tests had revealed that he was prone to potentially dangerous, abnormal heart rhythms.

54.   Lee suffers from abnormal heart rhythms and cardiomyopathy, a gradual weakening of the heart muscles that began when she was pregnant with her second child.

55.   Most of the deaths were attributed to cardiovascular disease, including sudden cardiac death, which can be caused by blockages in arteriesor by abnormal heart rhythms.

56.   Nevertheless, the machine was still able to record heart rhythms, because it did not need to know the date to do that.

57.   None of the men had any significant change in his heart rhythm, and none suffered a heart attack within a month after the experiment was over.

58.   Now dual chamber pacemakers are used in treating a common abnormal heart rhythm known as atrial fibrillation.

59.   On television, zapping a heart rhythm back to normal looks so simple a class of sixth graders probably could learn it in a minute, right?

60.   One implants such devices only if the abnormal heart rhythms have the potential to progress to a chaotic, rapid rhythm that could lead to sudden death.