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Biomedical subjects

D A Paskewitz

Publications and source records attributed to D A Paskewitz.

15 recordsLinked to original sources
PubMed1986

Effect of low-level, 60-Hz electromagnetic fields on human lymphoid cells: I. Mitotic rate and chromosome breakage in human peripheral lymphocytes.

Dividing human peripheral lymphocytes from 10 normal adults (5 males and 5 females) were exposed in vitro to low level 60-Hz electromagnetic fields for 69 hours. The current density of the electrical field was 30 microA/cm2, while the magnetic field was either 1 or 2 gauss. The cytological endpoints measured were mitotic rate and chromosome breakage. No statistically significant differences, indicative of a field effect, were observed between treated and control cells whether exposed to an electric field, a magnetic field, or to various combinations of the two.

Adult↗
PubMed1982

Interpersonal aspects of blood pressure control.

Recent observations of large, consistent increases in blood pressure during human communication prompted a reassessment of the role of interpersonal factors in the behavioral control of hypertension. It was noted that the conceptual framework around which earlier behavioral studies have been carried out, as well as in the physical methods of pressure determination themselves, have contributed to a general lack of information about the role of interpersonal interactions in hypertension. An awareness of the relationship between speaking and pressure elevations has led to the development of a new conceptual approach to understanding the etiology and treatment of hypertension. Using techniques developed out of transactional psychophysiology, hypertensive patients have been able to observe the importance of interpersonal communications in the regulation of their own blood pressure. Evidence from the clinical use of such information suggests that a new way can be developed to help patients lower their blood pressure.

Behavior Therapy↗
PubMed1979

Some aspects of sleep disturbance in coronary patients.

Of 42 coronary care patients studied during 10 hr. of polygraphically recorded sleep, 28 were in an open-ward coronary care unit and 14 were in a semi-private telemetry unit. The observed sleep disturbances were not a function of type of unit, length of hospitalization, sex, or medications. Sleep was significantly less fragmented in those patients judged less severe in pathology. These results indicate that alterations in normal sleep patterns occur routinely within coronary care environments, even in the absence of disturbing environmental stimuli and suggest that a closer analysis be made of sleep in these settings in light of the known relationships between sleep and cardiac function.

Adult↗
PubMed1977

Psychological aspects of cardiac arrhythmia.

A review of data from a wide spectrum of research studies suggests that psychological-emotional factors can significantly influence and alter the incidence of cardiac arrhythmia. While the existing data are, in many cases, difficult to interpret because of theoretical and methodological problems, sufficient evidence does exist to warrant a concerted investigation into the total involvement of psychological factors in cardiac arrhythmia.

Animals↗
PubMed1974

Aversive situational effects on alpha feedback training.

Anticipation of electric shock did not depress alpha activity in a feedback situation though it was associated with reported anxiety and heightened arousal indexed by greatly increased heart rate and number of spontaneous skin conductance responses. Contrary to previous reports, a reduction in alpha activity is not a necessary consequence of apprehension or heightened arousal.

Alpha Rhythm↗
PubMed1973

Visual effects on alpha feedback training.

Presenting an audible indication of subjects' electroencephalographic alpha activity under conditions of dim ambient illumination led to systematic increases in alpha density, while in total darkness the same procedure did not. These results support the view that feedback training can be clearly demonstrated only when factors leading to a suppression of alpha activity are present in the environment.

Alpha Rhythm↗
PubMedDate not supplied

Sleep-waking changes in cardiac arrhythmia in a coronary care patient.

A single case is reported in whom ventricular cardiac arrhythmias were related to the occurrence of polygraphically verified sleep. A strong relationship was found to exist between the heart rate in any one minute and the number of premature ventricular contractions, with higher rates associated with a greater number of these ectopic beats.

Arrhythmias, Cardiac↗
PubMedDate not supplied

Human contact and cardiac arrhythmia in a coronary care unit.

In a sample of 225 coronary care patients it was observed that a significant reduction in ventricular arrhythmias occurred following pulse palpation. These data suggest that significant changes in ventricular arrhythmia can occur as a result of even minimally arousing psychosocial interactions.

Adult↗