Non-linear structure analysis of inter-beat interval data in patients after myocardial infarction

SEMRÁD, Bořivoj, Bohumil FIŠER and Nataša HONZÍKOVÁ. Non-linear structure analysis of inter-beat interval data in patients after myocardial infarction. Scripta Medica. Česká republika: MU Faculty of Medicine,Brno, 2000, vol. 73, No 3, p. 191-194. ISSN 1211-3395.

Basic information

Original name

Non-linear structure analysis of inter-beat interval data in patients after myocardial infarction

Name in Czech

Nelineární strukturální analýza tepových intervalů u nemocných po infarktu myokardu

Name (in English)

Non-linear structure analysis of inter-beat interval data in patients after myocardial infarction

Authors

SEMRÁD, Bořivoj (203 Czech Republic), Bohumil FIŠER (203 Czech Republic) and Nataša HONZÍKOVÁ (203 Czech Republic, guarantor)

Edition

Scripta Medica, Česká republika, MU Faculty of Medicine,Brno, 2000, 1211-3395

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Other information

Language

Czech

Type of outcome

Článek v odborném periodiku

Field of Study

30201 Cardiac and Cardiovascular systems

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14110/00:00002519

Organization unit

Faculty of Medicine

Keywords in English

myocardial infarction; scaling index;

Tags

Myocardial infarction, scaling index

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Abstract

V originále

The aim of the present study was to test reliability of the quotint fast scaling index method" of nonlinear dynamics (chaos theory) of heart rate variability. Holter 24-hour ECG recordings in patients after myocardial infarction were analysed. The scaling index alpha, i.e. the state distribution of successive RR intervals in phase space, was calculated of 500 beats at the beginning of each hour and the N(alpha) histogram was constructed as a sum of 24 histograms. The difference between the alpha value calculated for the peak of sinus rhythm and that for ectopic beats was determined. The reliability of this fast method was tested by a comparison of each 24-hour histogram with three relevant 6-hour histograms (night, morning and afternoon). No difference was found in the delta alpha determination from 24-hour and 6-hour periods. The time of recording (morning, afternoon, night) did not play any role, either. It is concluded that this scaling index alpha method is suitable for clinical practice.

In English

The aim of the present study was to test reliability of the quotint fast scaling index method" of nonlinear dynamics (chaos theory) of heart rate variability. Holter 24-hour ECG recordings in patients after myocardial infarction were analysed. The scaling index alpha, i.e. the state distribution of successive RR intervals in phase space, was calculated of 500 beats at the beginning of each hour and the N(alpha) histogram was constructed as a sum of 24 histograms. The difference between the alpha value calculated for the peak of sinus rhythm and that for ectopic beats was determined. The reliability of this fast method was tested by a comparison of each 24-hour histogram with three relevant 6-hour histograms (night, morning and afternoon). No difference was found in the delta alpha determination from 24-hour and 6-hour periods. The time of recording (morning, afternoon, night) did not play any role, either. It is concluded that this scaling index alpha method is suitable for clinical practice.