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Biomedical subjects

W Adamczyk

Publications and source records attributed to W Adamczyk.

17 recordsLinked to original sources
PubMed2006

Effects of training on the ventilatory response to hypoxia.

The purpose of the present study was to examine the influence of systematical training on the ventilatory response to hypoxia. A rebreathing technique - progressive isocapnic hypoxia - was used to measure hypoxic chemoreflex reactivity. The ventilatory response was measured in a group of 22 world class adult kayakers (22.6 +/-1.9 yr), 16 young kayakers (17.8 +/-1.1 yr), and 38 control subjects (21.9 +/-1.9 yr). The ventilatory response to hypoxia - analyzed as the relationship (slope) MV/SaO(2) (minute ventilation/oxygen arterial blood saturation) - in the adult kayakers was significantly lower (-1.03 +/-0.28 L/min/%, P<0.01) compared with those in the control group (-1.81 +/-0.54 L/min/%) and the young kayakers (-1.54 +/-0.6 L/min/%; the difference between the latter two was insignificant). The following values of P(0.1)/SaO(2) (mouth occlusion pressure/oxygen arterial blood saturation) relationship were found for the investigated groups: adult kayakers (-0.20 +/-0.1 cm H/(2)O/%, P<0.05), young kayakers (-0.47 +/-0.1 cm H/(2)O/%, N.S.), control group (-0.48 +/-0.18 cm H(2)O/%). Correlation between the hypoxic ventilatory response and VO(2)max was significant in both groups of kayakers. These findings indicate that tolerance for hypoxia was elevated in the group of athletes compared with the control group. Hypoxic tolerance correlates with the duration of training.

Adolescent↗
PubMed2006

Improvement in the face/name association performance after three months of physical training in elderly women.

Several lines of evidence suggest that physical exercise not only influences the development of muscles, cardiovascular and respiratory systems, but also exerts a significant influence on the central nervous system. We examined the influence of strength and endurance training on cognitive performance in 33 healthy elderly volunteers (women, mean age 63.5 +/-4.5 yr) over a 3-month period of supervised training program. A control group consisted of 8 age-matched (mean age 66.3 +/-4.6) healthy volunteers who did not participate in any exercise training program. To evaluate the cognitive performance in our subjects we used two tests: face/name association test and Stroop test. The tests were applied shortly before and immediately after the training program. In the experimental group, a significant improvement in the association test performance, on average, from 71.6 +/-7.3% to 79.7 +/-7.2% (P<0.0001) was observed over the 3-month training period. There were no changes in the Stroop test results over the same time. Likewise, there were no changes in the control groups. Our data demonstrate that the training regime that is strictly followed over a relatively short period of time may improve the performance in associative memory tasks in elderly subjects. The study supports the notion that physical exercise influences cognitive performance and extend this notion to be valid for healthy elderly subjects.

Aged↗
PubMed1992

[Left coronary artery-pulmonary artery fistula. Case report].

A case of a 45-year-old male with anterior descending branch of the left coronary artery fistula to the main pulmonary trunk is reported. The patient was admitted because of a retrosternal pain. ECG showed ST-elevation in leads V2-3. This was first episode of anginal symptoms. The authors suggest that the single episode of coronary pain may have been provoked by faintness (following alcohol consumption) in the mechanism of the steal syndrome or by coronary spasm. A fistula (on coronarography) was diagnosed (the coronary arteries showed no changes). The value of the shunt calculated via Flick's method was 1.1 l/min. Exercise test, 24-hour ECG recording as well as stress thallium scintigraphy did not reveal post-exertion ischemic changes. During a 17-month post hospitalization follow-up the patient reported no anginal symptoms. Because of the small shunt and asymptomatic follow-up no surgical treatment was recommended.

Arterio-Arterial Fistula↗
PubMed1975

A failure to improve radiologists' performances in diagnosing pulmonary lesions by a computer-aided approach.

A traditional radiological evaluation of five lung diseases and their computer-aided diagnosis with Bayes' approach, were based on the plain chest film. Parameters of diagnostic performance for 12 radiologists, who made 1224 diagnoses by each method, were compared. Under the conditions of this study the use of a computer-aided method did not improve radiologists' performances independently of their diagnostic ability and experience.

Bronchial Neoplasms↗