HEART RATE DECELERATION RUNS FOR POSTINFARCTION RISK PREDICTION
Authors: Gui-zhi Liu
Introduction: Heart rate deceleration runs (DRs) was reported by Georg Schmidt in 2012. The analysis of DRs has an important prognostic value in survivors of acute myocardial infarction. The study wants to explore the prognostic value of heart rate deceleration runs (DRs) for postinfarction risk prediction.
Methods: DRs, heart rate deceleration capacity (DC) and Heart rate variability (HRV) parameters, standard deviation of normal-to-normal RR intervals (SDNN) were calculated by computer using 24-h Holter recordings of 87 patients with AMI (AMI group), 96 patients with OMI (OMI group) and 100 patients without myocardial infarction (control group). The recordings were digitized at 128 Hz and analyzed on the DMS Holter System. All subjects were followed up during a median 7 months.
- The median value of DRs, DC and SDNN in the AMI group and OMI group, especially in the AMI group was significantly lower than that in the control group, although the mean heart rate was the same in those three groups. The median value of DRs was decreasing with that of DC and SDNN.
- A significant positive correlation was observed between DRs and DC and between DRs and SDNN in the AMI group.
- Multivariate model of DRs of 2, 4, and 8 cycles identified low-, intermediate-, and high-risk groups. In these groups of the AMI sample, the total mortalities were 0.0%, 5.6%, and 33.3%.
Conclusions: The results of this study show that the analysis of DRs has an important prognostic value in survivors of acute myocardial infarction.