Influence of spontaneous ventricular premature beat coupling interval on the value of heart rate turbulence

Česká verzia

Authors: M. Kozák; L. Křivan; M. Sepši; P. Trčka; J. Vlašínová
Authors place of work: Interní kardiologická klinika Lékařské fakulty MU a FN Brno, pracoviště Bohunice, přednosta prof. MUDr. Jindřich Špinar, CSc., FESC
Published in the journal: Vnitř Lék 2008; 54(9): 803-809
Category: Original Contributions

Summary

The heart rate turbulence is promising marker of a sudden cardiac death.

The aim of the study is to evaluate the influence of the ventricular premature beat (VPB) coupling interval on the values of turbulence onset (TO) and turbulence slope (TS) parameters in the three groups of patients – “healthy” with ventricular premature beats, pts post myocardial infarction (MI) and pts with chronic heart failure with the left ventricle ejection fraction (LVEF) < 0.35.

Patients and methods:
382 pts were examined: healthy – 149, post MI – 123 and LVEF < 0.35 – 110. The distribution of VPB was analyzed and the values of TO and TS were evaluated according to the coupling intervals of VPB – in the intervals 00–50, 51–100 ( % of RR interval) and in the intervals 34–66 and 67–100 ( % of RR interval).

Results:
The coupling interval of spontaneous ventricular premature beats cause the statistically significant variability HRT values in all three groups of pts.

Conclusion:
The values of TO in the groups of post MI pts and pts with chronic heart failure are higher (risky for sudden cardiac death) after VPB with longer coupling intervals (50–100%, event. 67–100% of RR interval). The TS values are lower (risky for sudden cardiac death) after VPB with longer coupling interval, too. For evaluation of HRT we should use the VPBs with long coupling intervals.

Key words:
heart rate turbulence – ventricular premature beat coupling interval

Zdroje

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