相关实验视频

Updated: May 1, 2026

High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart

High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart

Published on: July 10, 2010

使用高分辨率磁共振血管学检测静脉移植疾病

Susan E Langerak¹, Hubert W Vliegen, Albert de Roos

¹Department of Cardiology, Leiden University Medical Center, Leiden, the Netherlands.

|January 24, 2002

概括

高分辨率的3DMR血管造影精确检测冠状动脉旁路移植疾病,区分专利和封闭的移植. 这种非侵入性工具有助于诊断胸痛患者的静脉移植问题.

科学领域:

心血管成像 - 心血管成像
医学诊断医学诊断医学诊断
放射学放射学是指放射学

背景情况:

冠状动脉旁路移植 (CABG) 手术是治疗冠状动脉疾病的常见方法.
需要使用非侵入性方法来评估移植的通透性和检测狭窄.
以前的磁共振 (MR) 血管造影技术在检测移植狭窄症方面存在局限性.

研究的目的:

为了评估高分辨率导航器关闭的3维 (3D) MR血管学在识别静脉移植疾病的准确性.
评估诊断性能,检测移植闭塞和狭窄.

主要方法:

在38名患者 (56例移植) 中进行了MR血管造影,这些患者在CABG后出现了复发性胸痛.
冠状动脉血管学与定量分析作为参考标准.
两个失明的观察者评估了移植塞和狭窄 (>/=50%和>/=70%) 的信心得分.

主要成果:

由于图像质量不足,六个移植被排除在外.
接收器-操作器特征分析显示,对闭塞的表现良好 (AUC 0.89),对狭窄的检测相当准确.
观察者之间的一致性在闭塞方面很高 (94%),在狭窄方面中度 (72-82%).

结论:

高分辨率导航门的3DMR血管学有效地区分了专利与封闭静脉移植.
这种技术在评估静脉移植疾病方面表现出相当的诊断准确性.
它作为评估CABG后胸痛患者的非侵入性工具具有前景.

更多相关视频

Magnetic Resonance Derived Myocardial Strain Assessment Using Feature Tracking

Magnetic Resonance Derived Myocardial Strain Assessment Using Feature Tracking

Published on: February 13, 2011

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

Published on: July 20, 2022

相关概念视频

Assessing Blood pressure using a doppler ultrasound

Assessing Blood pressure using a doppler ultrasound

To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...

Imaging Studies VII: Vascular Imaging

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...