用组织多普勒回声心脏学量化左心室缩功能的量化:测量缺血性心肌前后射出速度的附加值
Thor Edvardsen1, Stig Urheim, Helge Skulstad
1Institute for Surgical Research and Department of Cardiology, Rikshospitalet University Hospital, Oslo, Norway.
Circulation
|May 1, 2002
概括
组织多普勒成像 (TDI) 可以诊断心肌缺血. 测量在同体积相中的速度,而不仅仅是弹射,提高了TDI的区域功能障碍的诊断能力.
科学领域:
- 心脏病学 心脏病学
- 医疗成像医学成像
- 身体生理学 身体生理学
背景情况:
- 组织多普勒成像 (TDI) 是诊断心肌缺血的一个有前途的技术.
- 了解缺血性心肌中的速度模式对于评估区域功能至关重要.
- 调查速度测量的时间可以提高TDI的诊断能力.
研究的目的:
- 调查缺血性心肌和区域功能中的速度模式之间的关系.
- 为了确定速度测量的时间 (射出与同流体相) 是否提高了TDI的诊断能力.
- 评估TDI在量化区域心肌功能障碍方面的有用性.
主要方法:
- 在这项研究中使用了开放胸部麻醉的狗.
- 测量压力,心肌纵向段长度和速度,分别使用微手表,声微仪和TDI.
- 计算心肌纵向应变率为速度除以距离左心室顶部的距离.
主要成果:
- 中度缺血减少了缩缩短和缩速度的峰值.
- 严重的缺血导致缩延长,峰值射出TDI速度仍然为正值.
- 在同位体缩 (IVC) 和同位体放松 (IVR) 期间的TDI速度与声微量学相关性很好,识别了缩延长和后缩缩.
- 在非缺血性心肌中,缩性应变率的峰值比非缺血性心肌的速度更为均.
结论:
- 峰值喷射速度是严重缺血性心肌的不充分测量.
- IVC和IVR速度是评估心肌动力障碍的优秀标志物.
- 纳入异体体和喷射速度的TDI有效量化了区域性心肌功能障碍.
- 纵向应变速率提供了比速度更大的统一性,并可能提高TDI的诊断能力.
相关概念视频
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:
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
Imaging Studies for Cardiovascular System I:Echocardiography
Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion, evaluates...
Imaging Studies for Cardiovascular System II:Types of Echocardiography
Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
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...


