相关实验视频
Updated: Jan 18, 2026

09:15
In Vitro Thrombosis Test for Ventricular Assist Devices
Published on: March 21, 2025
1.2K
在接受阿皮克萨班和维生素K抗剂的HeartMate 3患者中生成血栓:可变性限制了临床适用性
Charlotte J Van Edom1,2, Walter Droogné1,2, Steven Jacobs2,3
1Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium.
JHLT open
|January 16, 2026
概括
与华法林相比,在HeartMate 3左心室辅助装置患者中使用阿皮克萨班显示出更快的凝血启动. 然而,显著的变异性限制了apixaban用于剂量监测的使用.
科学领域:
- 心脏病学 心脏病学
- 药理学 药理学是指药理学的学科.
- 生物化学 生物化学
背景情况:
- 维生素K抗体 (VKAs) 正被apixaban替换为HeartMate 3 (HM3) 左心室辅助器件 (LVAD) 患者.
- 在LVAD患者中,阿皮克萨班的药理动力学尚不清楚.
研究的目的:
- 通过使用血栓生成试验 (TGA) 来比较HM3 LVAD患者中阿皮克萨班与VKAs的药理学效应.
- 评估该患者群体中阿皮克萨班剂量定位的可变性和潜力.
主要方法:
- 对24名接受阿皮克萨班治疗的HM3患者和6名接受VKAs的患者进行了血栓生成试验 (TGA).
- 阿皮克萨班的最低水平保持在>50 ng/升;VKA的目标INR为2至3.
- 包括没有最近凝血病的患者.
主要成果:
- 阿皮克萨班显示了更短的延迟时间和时间到峰值的血栓生成,表明凝血的启动速度更快.
- 与阿皮克萨班一起观察到更高的内源性血栓激素潜力 (ETP).
- 峰值血栓和ETP都表现出高的个体间差异性.
- 阿皮克萨班水平与启动参数有轻微的相关性,但与ETP或峰值血栓并没有相关性.
结论:
- 与HM3 LVAD患者的VKA相比,阿皮克萨班表现出明显的药学动力学特性.
- 显著的个体间变异性和与关键血栓生成标记物的有限相关性表明TGA是研究工具,而不是监测在这种环境中对阿皮克萨班剂量定位的测试.
相关概念视频
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
2.1K
Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
2.1K
Venous Thrombosis III: Interprofessional Care
280
Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
280
Anticoagulant Drugs: Low-Molecular-Weight Heparins
1.7K
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
1.7K
Disorders of Hemostasis
2.0K
Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
2.0K
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
1.9K
Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
1.9K
Therapeutic Drug Monitoring: Affecting Factors
202
Therapeutic Drug Monitoring (TDM) is the clinical practice of measuring specific drug levels in a patient's blood or body tissues to manage and optimize therapy. TDM is crucial for drugs with narrow therapeutic windows, like warfarin and phenytoin, where incorrect doses can lead to treatment failure or severe side effects. This monitoring ensures the dosage administered is within a safe and effective range. The factors affecting therapeutic drug monitoring include:Patient-Specific Factors:a.
202

