Results 181 to 190 of about 1,566,571 (229)

Depression of artificial pacemakers by extraneous impulses

American Heart Journal, 1967
Abstract Analysis of iatrogenic electrical arrhythmias serves to validate the assumptions postulated through the study of clinical electrocardiograms. Other disorders of rhythm, without clinical counterpart, have also become apparent. The recently introduced demand pacemaker functions as a pacemaker that is artificial and automatic, yet not ...
Agustin Castellanos, Agustin Castellanos, Louis Lemberg, Louis Lemberg, James R. Jude, James R. Jude   +5 more
openaire   +3 more sources

A Swarm Based Integer and Fractional Order Heart Rate Controller for Cardiac Pacemaker

Journal of Electrical Systems
The heart's significant contribution is well known in the functioning of the human body. If it stops operating, the body shuts down systematically, which is known as cardiac arrest.
Tushar Verma, Syed Hasan Saeed, A. Mishra   +2 more
semanticscholar   +1 more source

Cardiac arrhythmias related to artificial pacemakers

Journal of Electrocardiology, 1971
Summary Various cardiac arrhythmias related to artificial pacemakers are described in detail, and representative electrocardiographic illustrations are presented. The importance of recognizing malfunction of various pacemakers has been emphasized. An early manifestation of malfunction should be suspected even when the pre-set rate is altered by only ...
openaire   +3 more sources

Reorganization of circadian activity and the pacemaker circuit under novel light regimes

Proceedings B
Many environmental features are cyclic, with predictable changes across the day, seasons and latitudes. Additionally, anthropogenic, artificial-light-induced changes in photoperiod or shiftwork-driven novel light/dark cycles also occur.
Pragya Sharma, V. Sheeba
semanticscholar   +1 more source

Recognizing Digitalis Toxicity in Patients With Artificial Pacemakers

Postgraduate Medicine, 1973
In a patient with ventricular rhythm induced by an artificial cardiac pacemaker, the clue to diagnosis of digitalis intoxication lies in electrocardiographic recognition of altered atrial mechanism, particularly the appearance of retrograde P waves. Recognition of ventricular premature contractions is also very important.
Edward K. Chung, Donald K. Chung
openaire   +3 more sources

Guide to the use of Artificial Pacemakers

Postgraduate Medicine, 1972
In comparison with the fixed-rate pacemaker, the demand type of artificial pacemaker has the advantage of avoiding competition between natural and pacemaker rhythms. Demand pacemaker function can be tested with a special external device that temporarily speeds the rate.
openaire   +6 more sources

Accurate Electrocardiographic Measurement of the Rate of Artificial Pacemakers

Annals of Internal Medicine, 1973
Abstract A new method accurately (2 msec, 0.2 beats/minute) measures the cycle length of artificial pacemakers with the conventional electrocardiograph and the 60-Hz AC interference artifact.
John B. Kostis, William Fearn
openaire   +3 more sources

The contribution of artificial pacemaking to understanding the pathogenesis of arrhythmias

The American Journal of Cardiology, 1971
Abstract Right atrial or ventricular pacing was performed on 36 occasions in 26 patients in an attempt to terminate a variety of tachyarrhythmias. Of 16 episodes of atrial flutter, 13 were terminated successfully; in 9 of the 13, sinus rhythm or the patient's pre-flutter rhythm was restored immediately, whereas in 4 patients, intervening atrial ...
openaire   +3 more sources

The artificial cardiac pacemaker

American Heart Journal, 1971
openaire   +5 more sources

THE SUPPRESSION OF ARRHYTHMIAS BY ARTIFICIAL PACEMAKING

The Lancet, 1964
Edgar Sowton, Peter Carson, Aubrey Leatham   +2 more
openaire   +3 more sources