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Biomedical subjects

Z Winter

Publications and source records attributed to Z Winter.

7 recordsLinked to original sources
PubMed1984

Inter-institutional variation of systolic time intervals in normal subjects.

The study was designed to evaluate inter-institutional variability in systolic time interval (STI) measurement. STI records were obtained from 8 institutions in Czechoslovakia. Altogether 262 normal subjects of both sexes were evaluated. The conclusions of three independent investigators were compared for inter-observer variability assessment. No significant differences were found among the participating centres for electromechanical systole, left ventricular ejection time and pre-ejection time dependence on heart rate and for ratio preejection time-left ventricular ejection time. The regression equations obtained for these indicators were suggested as a national standard for normal subjects.

Adult↗
PubMed1980

Automatized determination of left ventricular systolic intervals and assessment of their significance in the epidemiology of ischaemic heart disease.

Knowledge of the functional state of the myocardium in patients with coronary heart disease is of essential importance for the prognosis and therapy of the disease. The PEP/LVET index is closely correlated with the ejection fraction and is a reliable criterion for separating patients with normal and disturbed function of the left ventricle, but it does not suffice for uncovering an initial haemodynamic alteration either at rest or during isometric exercise test. The good reproducibility of systolic intervals makes possible a long-term follow-up of patients, especially in cases in which direct examination methods have limited applicability. Computer processing of polygraph tracings makes possible to analyse data of large groups of patients. The accuracy of systolic intervals determination matches that of the classical reading by two independent observes. The use of computing techniques in the analysis of curves and in their statistical evaluation contributes to the standardization of the whole measuring procedure and makes possible a wide clinical use of non-invasive polygraphic methods.

Adult↗
PubMed1977

Measurement of systolic time intervals through non-invasive polygraphic techniques in healthy subjects and in patients with ischaemic heart disease. Comparison of results obtained by conventional and computer assisted means.

Computer processing of carotidograms is an incontestable methodical asset. Electronic detection of systolic time intervals excludes human errors, makes possible evaluation of a greater number of systoles, and reduces the effect of nonlinearities of recording. The proposed computerized system saves tedious manual calculations and can yield results with mutual correlations within a short period of time.

Adult↗