A device that is implanted directly under the skin and is programmable with looping memory that records electrocardiogram (ECG) tracings. The recorder is programmed by a physician to retrieve data, and display and print stored data. The device is usually inserted under local anesthesia in skin over the chest. The patient has a hand-held telemetry unit that he or she activates whenever there are symptoms to initiate ECG recording and storage. The monitor can store up to 40 minutes of signals after an episode. The device is removed after the battery has failed, (approximately 14 months) or earlier, if a definitive diagnosis has been established.
A patient-activated event recorder, also called an insertable loop recorder, is often used to document a suspected arrhythmia (irregular heartbeats) that may, for example, be the cause of fainting (syncope) or near-fainting spells.
- Patient-activated event recorder
Patient-activated cardiac event recorder.
- Paul Ehrlich
Ehlich, Paul. 2. Paul R. Ehrlich (1932-), American evolutionary and population biologist.
- Pauling, Linus
how did atoms bond together to form molecules? In order to find out, he turned from chemical engineering to chemical theory. He enrolled in the first graduate program that offered adequate support, choosing a fledgling Pasadena research school, the California Institute of Technology, or Caltech. Pauling became one of the first chemistry students in an […]
- Pavlov conditioning
The Russian physiologist Ivan Petrovich Pavlov (1848-1936) conditioned dogs to respond in what proved to be a predictable manner, for example, by first ringing a bell before feeding them and then simply ringing the bell upon which stimulus they would begin to salivate as if they were about to eat.
- Pavlov pouch
At different points along the dogs’ digestive tracts, the Russian physiologist Ivan Petrovich Pavlov (1848-1936) surgically created pockets (“Pavlov pouches”) from which he could obtain secretions, the aim being to study the physiology of the digestive tract. He did so from the salivary glands down to the stomach, liver and pancreas with considerable success and […]