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Biomedical subjects

W Schulte

Publications and source records attributed to W Schulte.

At least 109 records · Page 6Linked to original sources
PubMed1982

The influence of fine surface structures on the osseo-integration of implants.

The availability of inert materials like dense, pure Al2O3-ceramic or titanium allows the study of purely biomechanical influences of surface modulations or lacune on the osseo-integration of implants at different locations of the skeleton. The discovery of the "load-line-shadow" phenomenon in lacune of dental implants and the observation of the same effect in the grooves of hip sockets (Lindenhof type) indicate the general validity of the rules controlling the remodelling ability of bony tissue. Their application to the problems concerned with load transmission via surfaces which are mainly loaded by shear can contribute to achieve a well defined anchorage of implants.

Aluminum Oxide↗
PubMed1982

Cardiovascular reactivity during mental stress testing, the type A interview, and exercise testing in healthy male subjects.

We compared the blood pressure (BP) of 61 healthy male Ss during mental arithmetic plus noise, physical exercise testing and the Type A interview. A consistent association between personality characteristics and cardiovascular reactivity was not found. There was a consistent correlation between systolic BP reactivity during mental arithmetic and the Type A interview. Mental arithmetic and exercise testing correlated significantly for middle aged men. No correlation of BP was found between the Type A interview and exercise testing.

Adult↗
PubMed1981

[Blood pressure reactivity to emotional stress in uncomplicated forms of hypertension (author's transl)].

Blood pressure behavior under basal conditions and emotional stress was examined in 48 patients with elevated casual blood pressure values who had no hypertensive cardiovascular complications and in 48 normotensives of the same age. In order to study possible interactions with age and sex each group was divided in two age and two sex subgroups respectively. Under basal conditions the blood pressure values of the hypertensive group were within the normal range but markedly higher than the values of the normotensive group. During stress the difference between both groups increased because the hypertensive group exhibited a stronger reactivity of blood pressure. There was an interaction between sex and hypertension in that in contrast to the hypertensive group normotensive women had lower blood pressure values at rest and under emotional stress than men. There was an influence of age consisting in a stronger blood pressure reactivity of the older subjects; this effect could be found in the hypertensive as well as in the normotensive group. Patients with uncomplicated forms of hypertension exhibit a blood pressure hyperreactivity on emotional stress independently of age and sex. According to previous investigations normotensive subjects with a family history of hypertension show stronger blood pressure reactivity, too. Therefore this phenomenon must be regarded as important in the pathogenesis of essential hypertension.

Adult↗
PubMed1981

[Problems of adaptation in hypertension research (author's transl)].

Emotional stress testing was performed twice in 12 normotensive and 12 hypertensive patients. When compared with normotensive persons, hypertensive patients had a clearly greater adaptation of blood pressure response in second stress test. This effect was so pronounced that differences between normotensive and hypertensive persons observed in the first test disappeared. Because of this pronounced adaptation effect, demonstrated until now only for emotional stress, intraindividual comparison does not seem a method of choice in the evaluation of antihypertensive effects by stress situations. Specific influence of antihypertensive drugs on emotional blood pressure reactions can only be demonstrated in the inter-individual comparison with another antihypertensive drug. First comparison between both groups should only be done after establishing a therapeutic effect on resting blood pressure.

Adaptation, Physiological↗
PubMed1981

[Traffic noise and hypertension risk. Hypothalamus theory of essential hypertension. Second communication (author's transl)].

In connection with the Bonn Study on Traffic Noise, 56 males with healthy cardiovascular systems were selected at random from two areas with different traffic noise conditions. The blood pressure was measured under the influence of a 5 minute standardized stressor and a 30 minute exposure to traffic noise. The 17 subjects with hereditary tendency to hypertension reacted significantly under the influence of both stressors with more marked rises in systolic and diastolic blood pressures than the 35 subjects who denied a hereditary tendency. On the other hand, the different residential areas did not affect the blood pressures obtained experimentally. The results support the hypothalamus theory of essential hypertension through the decisive etiological factors. At the same time they form the basis of a working hypothesis for a prospective study. According to this it is expected that males with a hereditary tendency to hypertension who have been exposed to traffic noise for several years will be more likely to develop hypertension.

Adult↗
PubMed1981

Relationship between blood pressure reactions on an ergometric and an emotional stress test.

The relationship between blood pressure reactions on an ergometric and an emotional stress test was studied in a population of 62 normotensive subjects. Significant correlations for systolic (r = 0.34, p = 0.004) and diastolic ( r = 0.03, p = 0.01) blood pressure were found. It is concluded that 1) there is a individual-specific blood pressure reactivity, 2) Hypertension is closely related to the individual-specific systolic blood pressure reactivity for it is known that hypertensives exhibit stronger systolic blood pressure reactions on both stressors.

Adult↗