目的研究快速起搏心房引起心房颤动(简称房颤)动物模型肺静脉前庭中L型电压依赖性钙通道(L-type voltage dependent calcium channel,LVDCC)α1c蛋白表达。方法通过建立犬房颤模型,并按是否产生房颤设立房颤组、窦性心律组和对照组,应...目的研究快速起搏心房引起心房颤动(简称房颤)动物模型肺静脉前庭中L型电压依赖性钙通道(L-type voltage dependent calcium channel,LVDCC)α1c蛋白表达。方法通过建立犬房颤模型,并按是否产生房颤设立房颤组、窦性心律组和对照组,应用免疫组织化学方法检测各组肺静脉前庭中LVDCCα1c蛋白表达,用图像分析系统对组织化学抗原表达进行半定量分析。结果α1c蛋白阳性表达在发生房颤的犬肺静脉前庭组织中表达明显下降,与对照组比较差异有显著性(P<0.05)。而同样条件下,不能诱发房颤的犬肺静脉前庭组织中α1c蛋白表达与对照组相比差别无显著性(P>0.05)。结论肺静脉前庭组织中LVDCC蛋白表达的变化可能参与了心房的电重构和心房颤动的发生和维持,该通道的变化也可能是房颤难以自发终止的原因之一,也可能是房颤发生的机制之一。展开更多
目的测定诱发心房颤动(AF)或持续电刺激2h前后肺静脉前庭有效不应期(ERP),探讨其在AF中的作用。方法健康杂种犬10只,S1S2程序刺激测定窦性心律下和诱发AF或持续电刺激2h后肺静脉前庭ERP;并进行AF诱发,并记录AF的发生。结果肺静脉前庭ER...目的测定诱发心房颤动(AF)或持续电刺激2h前后肺静脉前庭有效不应期(ERP),探讨其在AF中的作用。方法健康杂种犬10只,S1S2程序刺激测定窦性心律下和诱发AF或持续电刺激2h后肺静脉前庭ERP;并进行AF诱发,并记录AF的发生。结果肺静脉前庭ERP在诱发AF或持续电刺激2h后与窦性心律下相比差异有统计学意义(P<0.05)。诱发AF或持续电刺激2h后AF诱发率增加(24.38% VS 9.68%,P<0.05)。结论诱发AF或持续电刺激2h后可以使肺静脉前庭ERP缩短且更易诱发AF,肺静脉前庭在AF中起着重要作用。展开更多
Background Pulmonary vein antrum isolation （PVAI） of pre-excited atrial fibrillation （AF） is controversial. This study aimed to observe the therapeutic effects of PVAI on pre-excited AF. Methods Twenty-nine patien...Background Pulmonary vein antrum isolation （PVAI） of pre-excited atrial fibrillation （AF） is controversial. This study aimed to observe the therapeutic effects of PVAI on pre-excited AF. Methods Twenty-nine patients with pre-excited AF were prospectively divided into a PVAI group （group I, 19 cases） and a control group （group II, 10 cases）. To each case in group I, PVAI was performed, and then electroanatomical mapping of accessory pathways （AP） and ablation were constructed on a three-dimensional （3D） map of the valve annulus. Only AP ablation was performed in each case of group II. Results Of the 29 cases, three were found to have dual APs, two had intermittent APs, and the remaining 24 had single APs. All APs were successfully ablated after the procedure. There were no significant statistical differences in the AP procedure duration （（77.4±21.3） minutes vs. （85.3±13.1） minutes）, the AP ablation time （（204±34） seconds vs. （223±62） seconds） and the AP X-ray exposure time （（18.6±4.4） minutes vs. （19.1±4.5） minutes） respectively between groups I and II. As compared with the control group （5 of 10 cases, 50%）, the PVAI group had a significantly lower AF recurrence rate （2 of 19 cases, 11%; P 〈0.05） during follow-up of （20.5±10.0） months. All seven patients who recurred were successfully abolished by a second ablation. Conclusions In patients with pre-excited AF, PVAI is an effective therapeutic approach with a low AF recurrence rate. 3D electroanatomical maps of AP contributed to the high success rate of ablation without significantly prolonging of operational duration and X-ray exposure time.展开更多
文摘目的研究快速起搏心房引起心房颤动(简称房颤)动物模型肺静脉前庭中L型电压依赖性钙通道(L-type voltage dependent calcium channel,LVDCC)α1c蛋白表达。方法通过建立犬房颤模型,并按是否产生房颤设立房颤组、窦性心律组和对照组,应用免疫组织化学方法检测各组肺静脉前庭中LVDCCα1c蛋白表达,用图像分析系统对组织化学抗原表达进行半定量分析。结果α1c蛋白阳性表达在发生房颤的犬肺静脉前庭组织中表达明显下降,与对照组比较差异有显著性(P<0.05)。而同样条件下,不能诱发房颤的犬肺静脉前庭组织中α1c蛋白表达与对照组相比差别无显著性(P>0.05)。结论肺静脉前庭组织中LVDCC蛋白表达的变化可能参与了心房的电重构和心房颤动的发生和维持,该通道的变化也可能是房颤难以自发终止的原因之一,也可能是房颤发生的机制之一。
文摘目的测定诱发心房颤动(AF)或持续电刺激2h前后肺静脉前庭有效不应期(ERP),探讨其在AF中的作用。方法健康杂种犬10只,S1S2程序刺激测定窦性心律下和诱发AF或持续电刺激2h后肺静脉前庭ERP;并进行AF诱发,并记录AF的发生。结果肺静脉前庭ERP在诱发AF或持续电刺激2h后与窦性心律下相比差异有统计学意义(P<0.05)。诱发AF或持续电刺激2h后AF诱发率增加(24.38% VS 9.68%,P<0.05)。结论诱发AF或持续电刺激2h后可以使肺静脉前庭ERP缩短且更易诱发AF,肺静脉前庭在AF中起着重要作用。
文摘Background Pulmonary vein antrum isolation （PVAI） of pre-excited atrial fibrillation （AF） is controversial. This study aimed to observe the therapeutic effects of PVAI on pre-excited AF. Methods Twenty-nine patients with pre-excited AF were prospectively divided into a PVAI group （group I, 19 cases） and a control group （group II, 10 cases）. To each case in group I, PVAI was performed, and then electroanatomical mapping of accessory pathways （AP） and ablation were constructed on a three-dimensional （3D） map of the valve annulus. Only AP ablation was performed in each case of group II. Results Of the 29 cases, three were found to have dual APs, two had intermittent APs, and the remaining 24 had single APs. All APs were successfully ablated after the procedure. There were no significant statistical differences in the AP procedure duration （（77.4±21.3） minutes vs. （85.3±13.1） minutes）, the AP ablation time （（204±34） seconds vs. （223±62） seconds） and the AP X-ray exposure time （（18.6±4.4） minutes vs. （19.1±4.5） minutes） respectively between groups I and II. As compared with the control group （5 of 10 cases, 50%）, the PVAI group had a significantly lower AF recurrence rate （2 of 19 cases, 11%; P 〈0.05） during follow-up of （20.5±10.0） months. All seven patients who recurred were successfully abolished by a second ablation. Conclusions In patients with pre-excited AF, PVAI is an effective therapeutic approach with a low AF recurrence rate. 3D electroanatomical maps of AP contributed to the high success rate of ablation without significantly prolonging of operational duration and X-ray exposure time.
