title: [Power spectral analysis of heart rate in qi deficiency and both qi and yin deficiency in patients with coronary heart disease].
abstract: Qi deficiency (QD) and both Qi and Yin deficiency (QYD) are most common in TCM classification of CHD patients with insufficiency syndrome. The authors used the power spectrum of spontaneous heart rate fluctuation (PSHF) to analyze the function of cardiac regulation in 30 QD patients and 27 QYD patients with CHD and compare with the control group of 30 cases for discussing the association between different TCM syndrome patterns and the function of cardiac nerve regulation. The main results were as follows: (1) Low-frequency areas of PSHF in QYD (34.15 +/- 11.60%) were significantly higher than those in QD group (26.24 +/- 11.57%) and the control group (27.80 +/- 11.65%). The L/H ratio in QYD (1.78 +/- 0.96) was significantly higher than those in QD (0.91 +/- 0.64) and the control group (0.98 +/- 0.58). The changes of PSHF in QYD could have some relations with the increasing of the activity of sympathetic nervous system. (2) The change in body posture was used as a load test to study cardiovascular regulation in different TCM patterns of insufficiency syndrome with CHD. In control group the L/H ratio increased with the change of body posture from 0.98 +/- 0.58 to 4.29 +/- 0.89 (P less than 0.001), while in QD group and QYD group increased from 0.91 +/- 0.64 to 1.67 +/- 0.83 (P less than 0.05) and 1.78 +/- 0.96 to 1.85 +/- 0.87 (P greater than 0.2) respectively. The results suggested that cardiovascular baroreceptor reflex was decreased in CHD patients, and QYD group was inferior to DQ group.
authors.forename: Y Q
authors.initials: YQ
authors.lastname: Chen
authors.forename: K J
authors.initials: KJ
authors.lastname: Chen
authors.forename: F L
authors.initials: FL
authors.lastname: Sun
mesh_terms: D000368:Aged; D000787:Angina Pectoris / Q000503:physiopathology*; D001330:Electronic Data Processing; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008516:Medicine, Chinese Traditional; D008875:Middle Aged; D009203:Myocardial Infarction / Q000503:physiopathology*; D011187:Posture; D013057:Spectrum Analysis