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| Clinical value of deceleration capacity and heart rate deceleration runs in predicting sudden death of patients with acute myocardial infarction |
| SONG Kuang-Rong, LENG Yong-Qun, LU Jia-Jia, ZHANG Shuo, TU Wan-Hua, YE Jing |
| (Department of Electrocardiogram Diagnosis, Wuhan No.1 Hospital, Wuhan Hubei 430022, China) |
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Abstract Objective To make risk stratification of patients with acute myocardial infarction(AMI) by detecting deceleration capacity(DC) and heart rate deceleration runs(DRs), and to investigate the clinical significance of the two detection technics in the early warning of cardiac sudden death. Methods Comparative analysis was carried out between 90 AMI patients diagnosed with coronary heart disease by coronary angiography(CAG) (AMI group) and 90 healthy people with normal CAG results(normal group). The two groups underwent 24hour ambulatory electrocardiography examination while values of DC and DRs were automatically analysed and calculated by software. Results The values of DC and DRs descended significantly in AMI group, and the difference was statistically significant(P＜0.01) if compared with those in normal group. There were statistically significant differences of DC and DRs values between the AMI subgroups divided by the course of the disease and normal group. When the the course of AMI was over 6 months, the risk of cardiac sudden death decreased significantly. Meanwhile, the higher the risk indicated by DC and DRs was, the more severe the disease was, which coincided with the quantity and extent of lesioned vessels by CAG. Conclusion DC and DRs can be utilized to analyze vagus nerve function quantificationally and independently. The combined use of the two parameters is quite valuable in prewarning AMI high risk group.
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2015, Vol. 24 
