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相关概念视频

Voltage Doubler Circuit01:23

Voltage Doubler Circuit

504
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
504
Diode: Reverse bias01:14

Diode: Reverse bias

627
A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
627

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相关实验视频

Updated: Jun 14, 2025

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China
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对边缘左心室的反向双开关操作.

Annie R Abruzzo1, Rebecca S Beroukhim2, Sarah Campos3

  • 1Harvard Medical School, Boston, Mass.

The Journal of thoracic and cardiovascular surgery
|September 1, 2024
PubMed
概括
此摘要是机器生成的。

反向双开关操作 (R-DSO) 和心室开关为边缘左心提供了一种新方法,显示出有希望的早期结果,没有死亡率. 密切监测右心室功能障碍和三腹吐是必不可少的.

关键词:
双心室修复 双心室修复边界线是心脏左侧的边界线一个单心室单心室.

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Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
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科学领域:

  • 儿童心脏病学 儿童心脏病学
  • 生产性心脏手术 手术 生产心脏手术
  • 心脏生理学 心脏生理学

背景情况:

  • D环边缘左心带来了复杂的外科手术挑战.
  • 目前的管理选择包括单心室息或解剖双心室修复.
  • 需要新的外科手术策略来改善这些患者的治疗结果.

研究的目的:

  • 调查反向双开关操作 (R-DSO) 和心室开关的早期结果.
  • 为了评估使用形态右心室作为D循环边缘左心的系统心室.
  • 评估R-DSO/心室切换后的右心室功能和三腹吐.

主要方法:

  • 对接受R-DSO/心室切换 (2015-2023) 的儿童进行回顾性审查.
  • 主要终点:右心室 (RV) 功能和三腹吐.
  • 二级终点:死亡率,重新手术和术后并发症.

主要成果:

  • 分析了28名患者 (19名R-DSO,9名心室开关).
  • 随访时间中位数为1.0年;没有死亡或心脏移植发生.
  • 四名患者出现了轻度中度或更严重的RV功能障碍,4名患者出现了轻度中度或更严重的三角吐. 手术前的RV功能障碍预测了手术后的问题.

结论:

  • R-DSO/心室开关是边缘左心的一个可行的替代方案.
  • 密切监测RV功能障碍和三管吐是非常重要的.
  • 需要进行更长的随访时间的进一步研究,以与Fontan途径进行比较,并确定最佳候选人.