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P Wohlgemuth

Publications and source records attributed to P Wohlgemuth.

4 recordsLinked to original sources
PubMed1989

Results of pacemaker therapy in the German Democratic Republic. Organizational, methodological and technical aspects.

A review of the organizational, methodological and technical aspects of pacemaker therapy in the German Democratic Republic is presented. It underlines the importance of expeditious decentralization of cardiac pacing centres and the role played by an inter-disciplinary working group made up of cardiologists, surgeons and health-care engineers in establishing a uniform therapeutic standard. On the basis of data provided by the nation-wide registry of pacemaker therapy, statistical data on the numbers of pacemaker implantations, patient distribution by age and sex, indications and methods of pacemaker implantation and the types of devices employed are presented. Moreover, the current standard of technical development of pacemaker therapy in the German Democratic Republic is evaluated drawing on an analysis of this country's programme of pacemaker manufacture.

Adolescent↗
PubMed1988

Condylar position and extraction treatment.

By means of corrected tomography, the positions of the condyles in patients who had undergone four-premolar extraction treatment (20 edgewise and 7 Begg) were compared with the condylar positions of patients who had not yet received orthodontic treatment. No significant between-group differences in condylar position were noted. In addition, the relationship between bite depth and condylar position was examined and no significant correlation was found. Thus, as performed in this study, condylar position was unrelated to extraction treatment and to bite depth.

Adolescent↗
PubMed1975

Dynamic characteristics of heart-rate responses to sine-function work-load patterns in man.

Dynamic characteristics of heart rate in response to sinusoidal variations of work load were analysed in 8 male and 3 female untrained students exercising in a sitting position on a bicycle ergometer. The mean work load was 90 watt in men and 60 watt in women, the amplitudes being 50 and 30 watt respectively. Nine different frequencies were used, the periods varying from 0.5 to 15.0 min. By means of harmonic analysis, the fundamental components in the response of the heart rate have been shown to prevail over the 2nd and 3rd harmonics, indicating a mainly linear behaviour of the control system in the work-load range studied. A comparison of the frequency response of untrained males and females observed in this study and of trained sportsmen, investigated by wigertz (1970), reveals differences between the groups. The individual and ensemble mean frequency responses have been described by several transfer functions, the best fit having been obtained with functions containing two time constants including one with a highly damped oscillating element. The dominating dynamic parameter is a time constant of about 20 to 30 sec. This time constant tends to be shorter and its portion of the frequency response diminishes in order from the untrained females and males to the trained sportsmen. The individual time constant decreases as the PWC170 increases, and is therefore a suitable criterion for estimating the physical performance of individuals under dynamic conditions.

Adult↗