cardiac pacemaker


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Related to cardiac pacemaker: artificial cardiac pacemaker

pacemaker

 [pās´māk-er]
1. an object or substance that controls the rate at which a certain phenomenon occurs.
3. in biochemistry, a substance whose rate of reaction sets the pace for a series of interrelated reactions.
artificial pacemaker an electronic cardiac pacemaker that has a pulse generator to generate an extrinsic electrical impulse, causing the heart muscle to depolarize and then contract; its rate is preset regardless of the heart's intrinsic activity. It can be either temporary (transcutaneous, transvenous, or epicardial) or implanted.
asynchronous pacemaker an implanted pacemaker that delivers stimuli at a fixed rate, independent of any atrial or ventricular activity; this type is now rarely used except to initiate or terminate some tachycardias.
AV sequential pacemaker an implanted pacemaker with dual chamber pacing that maintains the atrial part of ventricular filling by stimulating the atrium if it does not respond at the proper interval after ventricular activity; used for patients with abnormal sinus node function or decreased atrioventricular conduction.
cardiac pacemaker a small mass of specialized muscle tissue in the heart that sets a rhythm of contraction and relaxation for the other parts of the heart, resulting in the heartbeat. Usually the pacemaker site is the sinoatrial node, near the junction with the superior vena cava. The normal rhythm, 60 to 100 contractions per minute, increases during physical or emotional stress and decreases during rest. The pace varies from person to person and is affected by abnormal conditions such as heart injuries and generalized infections. If the normal pacemaker fails to function, its regulating task may be taken over by another small mass of special muscular tissue, the atrioventricular node.
DDD pacemaker dual chamber pacemaker.
demand pacemaker an artificial pacemaker that activates only when it receives sensations indicating a lack of adequate spontaneous rhythm by the heart. It thus avoids competition with the patient's own natural pacemaker.
diaphragmatic pacemaker phrenic pacemaker.
dual chamber pacemaker an implanted pacemaker having two leads, one in the atrium and one in the ventricle, so that electromechanical synchrony between the chambers can be approximated. Called also DDD pacemaker.
A dual chamber pacemaker senses and paces in both the atrium and the ventricle.
ectopic pacemaker any biological cardiac pacemaker other than the sinoatrial node; under normal conditions it is not active.
electronic pacemaker artificial pacemaker.
epicardial pacemaker a temporary pacemaker whose leads are attached to the epicardial surface; usually used in the diagnosis and treatment of postoperative dysrhythmias.
escape pacemaker an ectopic pacemaker that assumes control of cardiac impulse propagation because of failure of the sinoatrial node to generate one or more normal impulses.
external pacemaker an artificial pacemaker located outside the body; the primary types are transcutaneous and transvenous. See also temporary pacemaker.
gastric pacemaker a saddle-shaped area of the greater curvature of the stomach at the junction of its proximal and middle thirds, which regulates the frequency of gastric contractions.
implantable pacemaker (implanted pacemaker) an artificial pacemaker implanted within the body.
phrenic pacemaker the device used in electrophrenic respiration; it converts radiofrequency signals into electrical impulses that stimulate the phrenic nerve, resulting in descent and flattening of the diaphragm and improved inhalation of air. Called also diaphragmatic pacemaker.
synchronous pacemaker an implanted pacemaker that synchronizes the physiological events in the atrium with those of the ventricle; it stimulates the ventricle when triggered by the P wave from the atrium.
temporary pacemaker an artificial pacemaker in which the pulse generator is not implanted, usually either a transcutaneous or transvenous pacemaker. See also external pacemaker.
transcutaneous pacemaker a temporary pacemaker in which large surface, high impedance electrodes are applied to the anterior and posterior chest walls to deliver high current stimuli of long duration for pacing of the ventricles.
transvenous pacemaker an artificial pacemaker, either external or implanted, that is connected to the heart by pacing leads passed through the venous circulation to make contact with the endocardium of the right atrium or right ventricle.
uterine pacemaker either of the two regulating centers that control uterine contractions, located near the openings of the fallopian tubes. When the fetus is ready to be born the pacemakers set off a series of rhythmic contractions in the uterine muscle that gradually force the infant out into the birth canal.
wandering pacemaker a condition in which the site of origin of the impulses controlling the heart rate shifts from the head of the sinoatrial node to a lower part of the node or to another part of the atrium.

cardiac pacemaker

See pacemaker.

cardiac pacemaker

A device that delivers a small electric shock to the heart to effect cardiac contraction at a pre-determined rate

car·di·ac pace·ma·ker

(kahr'dē-ak pas'māk-ĕr)
Surgically implanted electronic device to regulate the heartbeat.

cardiac pacemaker

See PACEMAKER.

artificial pacemaker

; cardiac pacemaker implanted electronic device that regularizes cardiac function (heart rate and rhythm) in patients with bradycardia or asystole; electrosurgery units interfere with pacemaker function and are contraindicated in patients with an indwelling pacemaker; a pacemaker patient may develop bradycardia, lapse into unconsciousness and require cardiopulmonary resuscitation (CPR) following accidental or relative overdose of local anaesthetic
References in periodicals archive ?
The report titled 'Asia Pacific Cardiac Pacemaker Market Outlook to 2019 - Rise in Cardiac Disorders and Growing Awareness among People to Drive the Demand' provides a comprehensive analysis of cardiac pacemaker market in Asia.
Slide 7: Cardiac Pacemaker - Market overview, Market size and Growth (Volume-Wise: 2012 - 2018e), Market Size and Growth (Value-Wise: 2012 - 2018e)
In addition to demographic data (age, gender), information was gathered on the cardiac pacemaker (type of device and reason for insertion), current cardiac medications, ECT (dose, electrode placement, and duration of electroencephalograph (EEG) and motor seizure), anaesthesia technique and complications.
This is a potentially fatal condition that can only be treated a the moment by implanting a cardiac pacemaker.
Page 15-17: Cardiac Pacemaker Market - Key features
Complete report on cardiac pacemaker market spread across 135 pages, profiling 20 companies and supported with 210 tables and figures is now available at http://www.
Sales of Implantable Cardiac Pacemakers by Product Type (Standard ICP, CRT-P)
Introduction II-1 Market Restraints II-1 Decline in Average Selling Price II-1 Recalls and Safety Alerts II-2 Threat form CRT-D Devices II-2 Growth Drivers II-2 Pacemakers Ensure Effective Management of Non-Systolic Heart Failures II-2 Advent of Cardiac Resynchronization Therapy (CRT) II-3 Leading Players and CRT Pacemakers II-3 Innovations Spark Growth II-4 Technologically Advanced Compact Models Hold Growth Potential II-4 Remote Monitoring Capabilities Expand Cardiac Pacemaker Applications II-4 Demographics Drive Demand for Cardiological Devices II-4 Growing Proportion of Obese Population II-5
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com/research/wcmskj/global_cardiac) have announced the addition of the "Global Cardiac Pacemaker Market 2014-2018" report to their offering.