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相关概念视频

Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

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...
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...
Heart Failure IV: Classification and Diagnostic Evaluation01:30

Heart Failure IV: Classification and Diagnostic Evaluation

Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...

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相关实验视频

Updated: Jul 7, 2026

Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension
09:23

Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension

Published on: February 11, 2017

B型尿性可以预测慢性左心室缩功能障碍的儿科门诊患者的不良心血管事件.

Jack F Price1, Anne K Thomas, Michelle Grenier

  • 1Department of Pediatrics, The Lillie Frank Abercrombie Section of Pediatric Cardiology, Baylor College of Medicine, Texas Children's Hospital, Houston, TX 77030, USA jprice@bcm.tmc.edu

Circulation
|August 31, 2006
PubMed
概括
此摘要是机器生成的。

B型尿素 (BNP) 水平在患有心力衰竭的儿童中升高,可以预测心血管不良事件. 儿科患者BNP度升高表明死亡或住院住院的风险较高.

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Clinical Application of Phase Angle and BIVA Z-Score Analyses in Patients Admitted to an Emergency Department with Acute Heart Failure
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Clinical Application of Phase Angle and BIVA Z-Score Analyses in Patients Admitted to an Emergency Department with Acute Heart Failure

Published on: June 30, 2023

Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure
05:16

Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure

Published on: June 10, 2025

相关实验视频

Last Updated: Jul 7, 2026

Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension
09:23

Shunt Surgery, Right Heart Catheterization, and Vascular Morphometry in a Rat Model for Flow-induced Pulmonary Arterial Hypertension

Published on: February 11, 2017

Clinical Application of Phase Angle and BIVA Z-Score Analyses in Patients Admitted to an Emergency Department with Acute Heart Failure
04:05

Clinical Application of Phase Angle and BIVA Z-Score Analyses in Patients Admitted to an Emergency Department with Acute Heart Failure

Published on: June 30, 2023

Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure
05:16

Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure

Published on: June 10, 2025

科学领域:

  • 儿童心脏病学 儿童心脏病学
  • 心脏衰竭中的生物标志物
  • 临床诊断 临床诊断 临床诊断

背景情况:

  • 血B型尿酸 (BNP) 含量已成为成人心力衰竭的生物标志物.
  • 儿童慢性心力衰竭中BNP的诊断和预后效用仍然在很大程度上是未知的.

研究的目的:

  • 确定患有慢性左心室 (LV) 缩功能障碍的儿童BNP度的范围和预测值.
  • 在这个儿科群体中评估BNP水平和不良心血管事件之间的相关性.

主要方法:

  • 在53名患有慢性LV系统功能障碍的儿童中,使用Triage测定测量了全血BNP度.
  • 对患者进行了90天复合终点监测,包括心脏死亡,心脏住院或心脏移植列表.
  • 排除标准包括最近住院和年龄在2个月至21岁之外.

主要成果:

  • 与健康对照组相比,患有 LV 功能障碍的儿童的 BNP 水平显著更高 (中位数为 78 pg/mL 与 7 pg/mL 相比,P < 0.0001).
  • 较高的BNP度与90天不良心血管事件的更高发病率有关 (中位数为735 pg/mL与37 pg/mL,P<0.001).
  • 300 pg/mL以上的BNP度显著增加了不良结果的风险 (调整后的危险比率为63.6;P < 0.0001).

结论:

  • 在患有慢性LV缩功能障碍的儿童中,BNP度显著升高.
  • 在儿科心力衰竭患者中,BNP水平是90天死亡,住院或心脏移植列表的复合终点的关键预测指标.