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相关概念视频

Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
Mitral Regurgitation II: Clinical Features and Diagnostic Tests01:23

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...

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Investigating Aortic Valve Calcification via Isolation and Culture of T Lymphocytes using Feeder Cells from Irradiated Buffy Coat
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通过电子束计算断层扫描测量的大动脉结石化的评估和临床影响.

David Messika-Zeitoun1, Marie-Christine Aubry, Delphine Detaint

  • 1Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic and Mayo Foundation, Rochester, Minn 55905, USA.

Circulation
|July 14, 2004
PubMed
概括

电子束计算机断层扫描准确地测量了大动脉结石化 (AVC),有助于诊断严重的大动脉狭窄 (AS). 这种方法为AS患者提供了独立的预后信息.

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科学领域:

  • 心血管成像 - 心血管成像
  • 放射学 放射学是一门学科.
  • 膜心脏疾病 膜心脏疾病

背景情况:

  • 电子束计算断层扫描 (EBCT) 确立为冠状动脉化,但不是大动脉膜化 (AVC).
  • 对于AVC的EBCT的准确性,诊断和预后价值及其与大动脉狭窄症 (AS) 严重程度的关联以前是未知的.

研究的目的:

  • 评估EBCT用于测量AVC的准确性和可重复性.
  • 评估通过EBCT测量的AVC与AS严重程度之间的关联.
  • 确定AS患者AVC的诊断和预后价值.

主要方法:

  • 对30个探索的大动脉膜的ex vivo分析,以将EBCT AVC得分与病理学量相关联.
  • 在体内测量AVC通过EBCT和AS严重程度通过心声谱大动脉面积 (AVA) 在100名患者.
  • 纵向随访以评估无事件存活率.

主要成果:

  • EBCT AVC 评分与病理学量 (r=0.96) 有很强的相关性,使得准确的估计.
  • 在AVC和AVA之间发现了强烈的关联 (r=0.79),表明了互补的信息.
  • 一个AVC评分≥1100AU表明93%的敏感性和82%的特异性严重的AS.
  • 升高的AVC得分独立地预测不良事件,即使在调整心声学发现后.

结论:

  • EBCT提供了一种准确和可重复的方法来测量AVC.
  • 通过EBCT测量AVC对于诊断严重的AS是有价值的,并提供独立的预后信息.
  • 将AVC评估与AVA结合起来,可以为AS患者提供全面的评估.