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  • Title: [Autonomic balance and some daily ECG monitoring parameters in patients with prior myocardial infarction].
    Author: Ivanov AP, El'gardt IA, Rostorotskaia VV.
    Journal: Klin Med (Mosk); 2003; 81(10):24-6. PubMed ID: 14664168.
    Abstract:
    The specific features of ischemic and arrhythmic manifestations and their relationship to the autonomic nervous system studied by analysis heart rhythm variability (CRV) were investigated in 87 patients with prior large myocardial infarction by using Holter monitoring. Spectral analysis of CRV revealed that in painful ischemia (PI) the total frequency (TF) of waves significantly decreased by 22%. In turn, episodes of silent ischemia (SI) were associated with a substantial (42%) increase in VLF-range power with a simultaneous significant reduction in the HF region of the spectrum by 53.8%. At the same time, the PI and SI groups greatly differed in the severity of complicated ventricular arrhythmias registered in 66.7 and 24.4% cases, respectively (p < 0.01). Thus, differences have been found in the episodes of myocardial ischemia: the pain equivalents are characterized by a higher risk for arrhythmia and SI is likely to be associated with the imbalance of ANS and with higher neurohumoral activity.
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