ISSN: 1223-1533

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ONE AND FOUR WEEKS DYNAMICS OF HEART RATE VARIABILITY IN CARDIAC RESYNCHRONIZATION THERAPY PATIENTS


Authors: O. Yu. Nochrina, V. V. Todosiychuk, T. N. Enina, P. V. Shebeko, V. A. Kuznetsov




 

 

 

Table 49.1.

 

 

Background: Acute changes in HRV after cardiac resynchronization therapy (CRT) have not been well assessed.

 

Objective: To evaluate dynamics in HRV one and four weeks after CRT.

 

Methods: This prospective study included eleven HF patients (52,7±7,5 years, New York Heart Association functional class III to IV). The analysis of HRV was performed at rest and active orthostatic test (AOT) in the short period (300 RR-intervals) before (baseline) and after one and four weeks of CRT.

 

Results: Results are shown in the table 49.1. One week after CRT significantly increased SDNN, TP, VLF and LF components at AOT. Four weeks after CRT we found a tendency to increase the high frequency spectral share (HF%), decrease the very low frequency spectral share (VLF%) at rest; increase SDNN and ÒÐ by increasing the power of all frequency components HRV at AOT.

 

Conclusion: These study results demonstrate the improvement of HRV parameters at rest and AOT after one and four weeks of  CRT.