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相关概念视频

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

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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...
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Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
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Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Aortic Regurgitation IV: Nursing Management01:17

Aortic Regurgitation IV: Nursing Management

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A nurse managing a patient with aortic regurgitation begins with a comprehensive assessment, including a review of the patient's medical history, family history, and lifestyle factors. During the cardiac examination, the nurse listens for heart sounds and checks for signs of valve abnormalities. The nurse also observes for symptoms such as dyspnea, orthopnea, and paroxysmal nocturnal dyspnea and assesses the patient's endurance and daily activity tolerance.Based on the findings, the nurse...
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Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

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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...
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相关实验视频

Updated: Jun 7, 2025

Investigating Aortic Valve Calcification via Isolation and Culture of T Lymphocytes using Feeder Cells from Irradiated Buffy Coat
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动脉狭窄症:一个综述

Catherine M Otto1, David E Newby2, Graham S Hillis3

  • 1Division of Cardiology, University of Washington School of Medicine, Seattle.

JAMA
|November 11, 2024
PubMed
概括

动脉狭窄 (AS) 是一种影响老年人的渐进性疾病. 在症状严重的AS患者中,通过手术更换大动脉或通过导管植入大动脉治疗显著降低了死亡率.

科学领域:

  • 心脏病学
  • 老年病学
  • 心脏膜疾病

背景情况:

  • 动脉狭窄症 (AS) 是65岁以上成年人的常见病症,其特征是动脉的化和纤维化.
  • 在美国,65岁以上的成年人中有1-2%和75岁以上的成年人中有12%患有这种疾病,每年导致全球超过10万人死亡.
  • 甲状腺炎涉及脂质透,炎症,纤维化和大动脉片的化,限制了血液流动.

研究的目的:

  • 审查动脉狭窄的诊断,治疗和治疗选择.
  • 强调对症状严重的AS及时干预的重要性.
  • 讨论手术性主动脉置换 (SAVR) 和跨导管主动脉植入 (TAVI) 的比较结果和指导方针.

主要方法:

  • 用心声扫描检测AS并评估其严重程度.
  • 治疗包括患者教育,定期临床和心声监测以及风险因素修改 (高血压,高脂血症,吸烟).
  • 症状严重的AS的治疗包括SAVR或TAVI.

主要成果:

  • 严重的AS被定义为大动脉速度≥4 m/s,平均梯度≥40 mm Hg,或膜面积≤1.0 cm2.
  • 在没有干预的情况下,症状严重的AS死亡率高达50%.
  • 在老年低风险患者中,SAVR和TAVI恢复了平均预期寿命,可比10年全因死亡率 (TAVI: 62. 7%,SAVR: 64. 0%). 医院住院时间更短,恢复速度更快.

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Last Updated: Jun 7, 2025

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Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro
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结论:

  • 性AS是一种通过心声扫描诊断的渐进性疾病,严重的症状病例的死亡率很高.
  • 在症状严重的AS患者中,SAVR或TAVI显著降低了死亡率,使预期寿命正常化.
  • 治疗决策应以基于证据的指导方针,共享决策和多学科的心脏组为指导.