11.   Guidant Corp. received Food and Drug Administration approval for use of its implantable heart defibrillator in patients who have rapid heartbeats and no symptoms.

12.   He lives with a condition, supraventricular tachycardia, that causes rapid heartbeats.

13.   He suffered a broken pelvis in the accident and was treated later for pneumonia and a rapid heartbeat, according to his wife, Judy.

14.   Heartbeats so rapid they would wake her husband at night.

15.   In high doses, it can cause rapid heartbeat, insomnia and anxiety.

16.   In humans, the toxic effects can lead to respiratory paralysis, extremely high body temperatures, dangerously low or high blood pressure, a rapid heartbeat, etc.

17.   It acts as both a pacemaker and a small defibrillator, which can interrupt abnormally rapid heartbeats before they can become fatal.

18.   Later that day another resident, unaware that Hurewitz had persistent nausea, hiccups and rapid heartbeat, wrote in his chart that his vital signs were stable.

19.   Lidocaine is known to lower the heart rate and in fact is used as an emergency treatment for dangerously rapid heartbeats.

20.   Phentermine also speeds up metabolism but can cause rapid heartbeat and insomnia.