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在常压-2.0MPa的系统压力下测定了滴流床中气-液两相并流下流动的动持液量,了气-液流率,液相粘度,填料大小,压力以及床层高度对动持液量的影响。实验结果表明增中液体流率动持流量增加,气体流率增加时,结果相反粘度的增加对动持液量的影响不大,动持液量随填料空隙率的增大而变小。 相似文献
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Elad Anter Fernando M. Contreras-Valdes Alexei Shvilkin Cory M. Tschabrunn Mark E. Josephson 《Journal of interventional cardiac electrophysiology》2014,39(3):225-232
Purpose
Arrhythmia recurrence following pulmonary vein isolation (PVI) occurs predominantly due to the reconnection of previously isolated pulmonary veins (PVs). The prognostic implications of detection and treatment of acute PV reconnection are not well understood. We aim to examine the prognostic significance of acute PV reconnection on arrhythmia recurrence at 1 year following PVI.Methods
This prospective study included 44 patients (22 men, 60?±?7 years) who underwent index PVI procedure for treatment of atrial fibrillation (AF). Acute PV reconnection and/or dormant PV conduction were assessed sequentially in response to a 30-min waiting period, intravenous isoproterenol infusion and/or adenosine. All cases of acute PV reconnection and/or dormant conduction were successfully targeted with additional ablation.Results
Freedom from AF at 1 year was 75 % (83.3 % in paroxysmal and 65 % in persistent AF, p?=?ns). Acute PV reconnection and/or dormant conduction were evident in 16 of 44 patients (36.3 %). AF recurrence was documented in eight of 16 patients with, but only in three of 28 patients without acute reconnection (p?=?0.009). Three patients underwent a redo procedure, all from the group of patients with acute PV reconnection. In a multivariate model, acute PV reconnection was a strong independent predictor of arrhythmia recurrence (hazards ratio [HR], 6.36; 95 % confidence interval [CI], 1.12–31.6).Conclusion
Identification of acute PV reconnection, even when successfully targeted, is a strong predictor of arrhythmia recurrence following PVI. 相似文献3.
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Anter Mohamed Elsibai Shabbana Ayman Abd Elkader Elhalaby Alaa Eldin Fatahlla Youssif Hager Abd Elshafy Abd Elfattah Elkhouly Nabih Ibrahim 《生殖与发育医学(英文)》2021,(3):150-155
Objective::To investigate the effect of early versus late amniotomy after induction of labor (IOL) with vaginally administered misoprostol.Methods::This randomi... 相似文献
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Free‐breathing combined three‐dimensional phase sensitive late gadolinium enhancement and T1 mapping for myocardial tissue characterization 下载免费PDF全文
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Association between CFH,CFB, ARMS2, SERPINF1, VEGFR1 and VEGF polymorphisms and anatomical and functional response to ranibizumab treatment in neovascular age‐related macular degeneration 下载免费PDF全文
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Improved dark blood late gadolinium enhancement (DB‐LGE) imaging using an optimized joint inversion preparation and T2 magnetization preparation 下载免费PDF全文
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High‐power and short‐duration ablation for pulmonary vein isolation: Safety,efficacy, and long‐term durability 下载免费PDF全文