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R Piotrowicz

Publications and source records attributed to R Piotrowicz.

36 records · Page 2Linked to original sources
PubMed1987

[Lactate threshold and the physiological cost of work].

Mean values for body size, fitness and endurance performance indices have been obtained from 20 industrial workers. Then the pulse rate from ECG using the Holter method during the worktime was registered and from the regression line PF on load energy expenditure was calculated. The "somatic" and "fitness" indices of subjects were not statistically significantly different from average workers population in Poland. The mean AT demonstrated that the subjects were able to perform hard work without metabolic acidosis developing, though those exhibiting lower AT worked with higher physiological cost of work. The study confirmed that the Holter method is extremely good for energy expenditure investigation during the worktime. Furthermore it was demonstrated that the physiological cost of moderate-heavy work was lower in subjects with higher AT. The authors suggested that the level of AT for medium-fit workers should come to about 2 dm3(02) X min.-1 (60%v02 max.

Adult↗
PubMed1985

Clinical significance of the pattern of incomplete left bundle branch block with bifascicular block.

A comparative analysis was carried out of 126 patients (group I) with chronic right bundle branch block (RBBB) and left anterior (LAFB) or left posterior fascicle block (LPFB), and of 44 patients (group II) with the same bifascicular block associated with an ECG pattern of incomplete left bundle branch block (ILBBB). The two groups were found to be clinically different. In group II, heart failure, arrhythmia and first-degree atrioventricular block occurred significantly more frequently. During a mean follow-up period of 1581 +/- 118 days (85-6260 days), complete heart block (CHB) developed in 3.2% of patients in group I and in 22.7% in group II (p less than 0.01). In the same period, sudden cardiac death (SCD) occurred in 3.9% in group I and in 15.9 in group II (p less than 0.01). These results were analysed assuming a quadrifascicular character of the intraventricular conduction system. This made it possible to isolate on the basis of standard ECG findings patients with trifascicular block (group II--RBBB and LAFB or LPFB and septal LBBB) in whom prophylactic pacemaker implantation should be considered in view of high risk of CHB and SCD.

Adult↗