| pacefollower | Any cell in excitable tissue that responds to stimuli from a pacemaker. (05 Mar 2000) |
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| pacemaker | 1. <apparatus, physiology> An object or substance that influences the rate at which a certain phenomenon occurs, often used alone to indicate the natural cardiac pacemaker or an artificial cardiac pacemaker. 2. <biochemistry> A substance whose rate of reaction sets the pace for a series of interrelated reactions. (24 Mar 1998) |
| pacemaker failure | Failure of an artificial pacemaker to generate or deliver effective stimuli to the myocardium. (05 Mar 2000) |
| pacemaker output | Electrical energy delivered into a standard load (500 ohms resistance). (05 Mar 2000) |
| pacemaker potential | The voltage inscribed by impulses from an artificial electronic pacemaker. (05 Mar 2000) |
| pacemaker sensitivity | The minimum cardiac activity required to consistently trigger a pulse generator. (05 Mar 2000) |
| pacemaker syndrome | <syndrome> The occurrence of symptoms relating to the loss of atrial-ventricular synchrony in ventricularly paced patients, or symptoms caused by inadequate timing of atrial and ventricular contractions in paced patients. (05 Mar 2000) |
| pacemaker, artificial | A device designed to stimulate, by electric impulses, contraction of the heart muscles. It may be temporary (external) or permanent (internal or internal-external). (12 Dec 1998) |
| pachak | <botany> The fragrant roots of the Saussurea Costus, exported from India to China, and used for burning as incense. It is supposed to be the costus of the ancients. Alternative forms: putchuck. Source: Websters Dictionary (01 Mar 1998) |
| Pacheco's disease | A highly contagious, acute disease of psittacine birds caused by a herpesvirus and characterised by bright yellow urates with scant faeces, icterus, and terminal anorexia. (05 Mar 2000) |
| Pacheco's parrot disease virus | Probably a virus of the family Herpesviridae, possibly related to the virus of infectious laryngotracheitis. Synonym: parrot virus. (05 Mar 2000) |
| pachometer | <apparatus> An instrument for measuring thickness, as of the glass of a mirror, or of paper; a pachymeter. Origin: Gr. Thickness. (24 Mar 1998) |
| Pachon's method | Cardiography, carried out with the patient lying on the left side. (05 Mar 2000) |
| Pachon's test | In a case of aneurysm, determination of the collateral circulation by estimation of the blood pressure. (05 Mar 2000) |
| Pachon, Michel | <person> French physiologist, 1867-1938. See: Pachon's method, Pachon's test. (05 Mar 2000) |