Immunohistochemical method displayed that endothelins-1 staining gray values of atrial muscle and ventricular muscle in the ischemic group(167.63±4.28,154.38±4.05) were evidently lower than those in the shenqi decoction group(182.75±7.74,182.97±2.14) (P< 0.01,P< 0.05).
Effects of stimulation frequency(6—24/min),calciumconcentration(1.8—9 mmol/L)and temperature(2.5—18℃)on the force-velocitycurve were also observed in 12 atrial muscle preparations. The results showedthat all the curves could not fit Hill's equation,although some changes did occur.
此外,在12例牛蛙心房肌标本中,观察了刺激频率(6—24次/min)钙离子浓度(1.8—9mmol/L)和温度(2.5—18℃)对张力速度曲线的影响,结果表明,虽然曲线发生变化,但仍不符合 Hill 公式。
The amplitude of the action potential ( APA) of the atrial myocardium was decreased from 88. 00 ±9. 35 to 62. 62±20. 50 mV (n = 6, P < 0. 01) , while the APA of the ventricular myocardium did not change significantly.
Results (1)The apoptosis was found in 8 rabbits(8/12 rabbits) in the center and peripheral region of SAN as well as peripheral atrial myocardium were found, and their apoptosis rates were 11.3%±3.7%,15.0%±4.5% and 24.4%±5.9% respectively.
2. Aschoff 's body scattered in atrial tissue according to the examination of light microscope: the positive percent in control was 37.5%(3/8); experimental Ⅰgroup were 46%(5/11); experimental Ⅱgroup were 50% (6/12).
Objective To evaluate the alteration and effect of atrial tissue angiotensin converting enzyme (ACE) and angiotensin Ⅱ receptors (AT_1, AT_2) mRNA expression on atrial structural remodeling in chronic atrial fibrillation.
Amiodarone-Induced Changes in Intracellular Ca2+ Homeostasis in the Atrial Myocardium of Patients with Chronic Coronary Insuffic
It was found that, in 30% of the IHD patients, the atrial myocardium displayed an abnormal contractility.
This phenomenon may contribute to the suppression of abnormal activity of the atrial myocardium and strengthen the direct antiarrhythmic effect of Amiodarone.
Histochemical analysis have shown that the atrial myocardium in IHD patients is characterized by an increased density of the microvascular network, increased phosphorylase activity, and decreased succinate dehydrogenase activity.
Influence of vanadate on electrophysiological and contractile parameters of atrial myocardium