PubMed Health⌕ Search

Biomedical subjects

U Ellringmann

Publications and source records attributed to U Ellringmann.

9 recordsLinked to original sources
PubMed1977

[The importance of inputimpedance of QRS-regulated pacemakers (author's transl)].

As smaller the inputimpedance of a QRS-inhibited or synchronous pacemaker as higher the necessary energy for regulation. A method for measurement of inputimpedance of pacemakers is described. These impedances from several types are determined. It is a necessity to lead an intracardial ECG with a loading resistor like the used pacemaker.

Electricity↗
PubMed1977

[X-ray-examination-time during implantation of pervenous leads for permanent cardiac pacing (author's transl)].

From February 1974 to December 1975 we performed 295 pacemaker operations. 165 of those were primary implantations of pervenous leads for permanent cardiac pacing. The X-ray examination time was between 0.1 and 17.0 minutes, their mean value was 2.6, their median 1.7 minutes. In those 165 cases there was a dislocation of the lead in 10.9 percent. Although our X-ray examination time was extremely short however in comparison with the literature we found no arise of our dislocation rate. Some hinces to keep radiation small are discussed.

Electrodes, Implanted↗
PubMed1977

[Extraction of tricuspid valve tissue and myocardium as a complication of transvenous cardiac pacing (author's transl)].

In a patient with transvenous cardiac pacemaker a piece of tissue, 5,5 cm in length, was removed from the wall of the right heart during the extraction of a "shouldered" electrode (Biotronik IE 85-K-O). Histologically it consisted of fibrous tissue as usually found around transvenous electrodes, tricuspid valve tissue, chordae tendineae, and myocardium. Detrimental consequences to the patient following this complication were not observed. Some problems caused by trapped endocardial electrodes and adequate therapeutic possibilities are discussed.

Electrodes, Implanted↗
PubMed1977

[Experiences with transvenously implanted pacemaker electrodes with special remarks on the treatment of leads out of function (author's transl)].

From 1965 to 1976, implantations of 502 pacemaker electrodes were performed. In 59 patients the first lead had to be changed. In December 1976, 355 patients were under our control. At this time, 11.7 percent were no longer paced via their first lead. Dislocations of the lead, increased threshold, insulation defect, skin perforation of the lead, myocardial perforation, adaptor defects, fracture, infection, and loops of the electrode were the reasons. In cases of exit block alone, you should try to take a high output pacemaker. In cases of entrance block, a pacemaker with increased input-impedance will do its work. If those two kinds of treatment will fail, you may speak about a lead out of function. Considering extraction of the electrode, except in cases of infection, you should exercise restraint, for severe complications may result. An electrode out of function has to be protected against disappearing in a safe way. A synopsis of electrode complications including cause, therapy, and prevention is given.

Electrodes, Implanted↗