Objective: To investigate the relationship between platelet-derived growth factor-A (PDGF-A) and atrial fibrosis in patients who have developed atrial fibrillation (AF) secondary to rheumatic valvular disease. Methods...Objective: To investigate the relationship between platelet-derived growth factor-A (PDGF-A) and atrial fibrosis in patients who have developed atrial fibrillation (AF) secondary to rheumatic valvular disease. Methods: 84 selected patients participated in the current study who have developed rheumatic heart disease and were going to have a cardiac surgical operation. In the current study, whole subjects were divided into two group, they were atrial fibrillation (AF) group (the quantity is thirty-nine) and sinus rhythm (SR) group (the quantity is forty-five). Before the operation, complete clinical data was available for the whole patients. During the operation, the right atrial tissue (0.3 - 0.5 mm<sup>3</sup>) was disserted from every patient. Right atrial fibrosis was observed by Masson staining and the distribution of PDGF-A in right atrium specimen was observed by immunohistochemistry. RT-PCR techniques were applied to admeasure the mRNA expressions of PDGF-A in patients’ atrial tissue. At the same time, western-Blot techniques were employed to admeasure the protein expressions of PDGF-A. Results: In baseline clinical characteristics, in both AF group and SR group, there was no apparently difference between them (P > 0.05);compared with SR group, the diameters of left atrium and right atrium in AF group were apparently increased (P Conclusion: Atrial remodeling plays an important role in patients with valvular atrial fibrillation;PDGF-A in patients with AF was highly expressed in the right atrial, and was closely related with atrial fibrosis.展开更多
The difference in the atrial organizational structure between patients with atrial fibrillation (AF) and those with sinus rhythm was investigated.In order to analyze the rationality in explaining the electrocardiogram...The difference in the atrial organizational structure between patients with atrial fibrillation (AF) and those with sinus rhythm was investigated.In order to analyze the rationality in explaining the electrocardiogram (ECG) characteristics of AF with statistics data or tissue remodeling model,and the logical relationship between the hypothesis of pulmonary veins (PV) muscle sleeves and that of multi wavelets in mechanism of AF,we examined the expression of collagen volume fraction of type I (CVF-I ) with picrosirius red staining,connexin 40 (Cx40) by immunohistochemistry,and intercalated disc (ID) using transmission electron microscope in atrial tissue.The results showed that there was significant difference in the expression of CVF-I (t=3.827,P<0.01),Cx40 (t=4.21,P<0.01),and groups of the ID that keeping the electrical transmission and atrial electrical coupling synchronization (t=15.116,P<0.001),but no significant difference was found in total IDs (t=0.611,P=0.543) between patients with AF and those with sinus rhythm.The quantitative differences in the tissue remodeling could not explain the ECG characteristics of AF.The number of normal IDs and abnormal distribution are the structural basis to trigger and maintain atrial electrical remodeling,and induce and maintain AF.Such histological reconstruction supports the hypothesis of multi wavelets and can also explain ECG features.展开更多
目的观察复方黄芪养心合剂(CAMNH)对SD大鼠冠状动脉结扎术后心室及血管周围胶原重构(VR)的影响。方法 SD大鼠47只随机取假手术组(SO组)8只。其余39只行冠状动脉左前降支结扎术,观察10天,存活29只大鼠按随机数字表法分为三组,复方黄芪养...目的观察复方黄芪养心合剂(CAMNH)对SD大鼠冠状动脉结扎术后心室及血管周围胶原重构(VR)的影响。方法 SD大鼠47只随机取假手术组(SO组)8只。其余39只行冠状动脉左前降支结扎术,观察10天,存活29只大鼠按随机数字表法分为三组,复方黄芪养心合剂组(CAMNH组)、美托洛尔缓释片组(MSSRT组)每组10只,心脏重构组(VR组)9只,CAMNH组MSSRT组予相应药物灌胃,VR组和SO组予蒸馏水灌胃,共计8周。计算全心室质量与体质量比(Vt/Wt);使用改良Masson染色法观察大鼠心室重构,用Image Pro Plus 6.0图像分析系统,计算心肌组织胶原容积分数(CVF)和血管周围胶原面积(PVCA)。结果 Vt/Wt:MSSRT组小于VR组[(2.77±0.26)%比(3.06±0.21)%,P<0.05];CAMNH组明显小于VR组[(2.67±0.17)%比(3.06±0.21)%,P<0.01]。CVF与PVCA:MSSRT组及CAMNH组与VR组比较明显降低[(43.89±6.83)%、(42.60±17.55)%比(59.01±6.93)%;(101.8±49.7)%、(104.1±41.2)%比(148.1±69.3)%;P<0.01]。结论复方黄芪养心合剂能够减轻冠状动脉结扎术后SD大鼠Vt/Wt,降低VR大鼠CVF、PVCA,作用与美托洛尔缓释片相当。展开更多
文摘Objective: To investigate the relationship between platelet-derived growth factor-A (PDGF-A) and atrial fibrosis in patients who have developed atrial fibrillation (AF) secondary to rheumatic valvular disease. Methods: 84 selected patients participated in the current study who have developed rheumatic heart disease and were going to have a cardiac surgical operation. In the current study, whole subjects were divided into two group, they were atrial fibrillation (AF) group (the quantity is thirty-nine) and sinus rhythm (SR) group (the quantity is forty-five). Before the operation, complete clinical data was available for the whole patients. During the operation, the right atrial tissue (0.3 - 0.5 mm<sup>3</sup>) was disserted from every patient. Right atrial fibrosis was observed by Masson staining and the distribution of PDGF-A in right atrium specimen was observed by immunohistochemistry. RT-PCR techniques were applied to admeasure the mRNA expressions of PDGF-A in patients’ atrial tissue. At the same time, western-Blot techniques were employed to admeasure the protein expressions of PDGF-A. Results: In baseline clinical characteristics, in both AF group and SR group, there was no apparently difference between them (P > 0.05);compared with SR group, the diameters of left atrium and right atrium in AF group were apparently increased (P Conclusion: Atrial remodeling plays an important role in patients with valvular atrial fibrillation;PDGF-A in patients with AF was highly expressed in the right atrial, and was closely related with atrial fibrosis.
文摘The difference in the atrial organizational structure between patients with atrial fibrillation (AF) and those with sinus rhythm was investigated.In order to analyze the rationality in explaining the electrocardiogram (ECG) characteristics of AF with statistics data or tissue remodeling model,and the logical relationship between the hypothesis of pulmonary veins (PV) muscle sleeves and that of multi wavelets in mechanism of AF,we examined the expression of collagen volume fraction of type I (CVF-I ) with picrosirius red staining,connexin 40 (Cx40) by immunohistochemistry,and intercalated disc (ID) using transmission electron microscope in atrial tissue.The results showed that there was significant difference in the expression of CVF-I (t=3.827,P<0.01),Cx40 (t=4.21,P<0.01),and groups of the ID that keeping the electrical transmission and atrial electrical coupling synchronization (t=15.116,P<0.001),but no significant difference was found in total IDs (t=0.611,P=0.543) between patients with AF and those with sinus rhythm.The quantitative differences in the tissue remodeling could not explain the ECG characteristics of AF.The number of normal IDs and abnormal distribution are the structural basis to trigger and maintain atrial electrical remodeling,and induce and maintain AF.Such histological reconstruction supports the hypothesis of multi wavelets and can also explain ECG features.
文摘目的观察复方黄芪养心合剂(CAMNH)对SD大鼠冠状动脉结扎术后心室及血管周围胶原重构(VR)的影响。方法 SD大鼠47只随机取假手术组(SO组)8只。其余39只行冠状动脉左前降支结扎术,观察10天,存活29只大鼠按随机数字表法分为三组,复方黄芪养心合剂组(CAMNH组)、美托洛尔缓释片组(MSSRT组)每组10只,心脏重构组(VR组)9只,CAMNH组MSSRT组予相应药物灌胃,VR组和SO组予蒸馏水灌胃,共计8周。计算全心室质量与体质量比(Vt/Wt);使用改良Masson染色法观察大鼠心室重构,用Image Pro Plus 6.0图像分析系统,计算心肌组织胶原容积分数(CVF)和血管周围胶原面积(PVCA)。结果 Vt/Wt:MSSRT组小于VR组[(2.77±0.26)%比(3.06±0.21)%,P<0.05];CAMNH组明显小于VR组[(2.67±0.17)%比(3.06±0.21)%,P<0.01]。CVF与PVCA:MSSRT组及CAMNH组与VR组比较明显降低[(43.89±6.83)%、(42.60±17.55)%比(59.01±6.93)%;(101.8±49.7)%、(104.1±41.2)%比(148.1±69.3)%;P<0.01]。结论复方黄芪养心合剂能够减轻冠状动脉结扎术后SD大鼠Vt/Wt,降低VR大鼠CVF、PVCA,作用与美托洛尔缓释片相当。
