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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 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...
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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...
Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...

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相关实验视频

Updated: Jun 20, 2026

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
06:34

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

由于冠状动脉疾病导致的左心室异能,矢量心脏学诊断和心电学相关性. 我. 我. 我. 我. 我. 我. 我. 前部和顶部部分的严重异能.

E Young, P F Cohn, R Gorlin

    Circulation
    |March 1, 1975
    PubMed
    概括
    此摘要是机器生成的。

    矢量心脏图 (VCG) 可以诊断严重的冠状动脉疾病 (CAD) 与前部和上部心肌功能障碍. 特定的循环模式,如时针方向的后向量旋转,是诊断这种严重异能性的关键指标.

    更多相关视频

    Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
    07:11

    Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography

    Published on: October 28, 2020

    Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China
    08:42

    Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China

    Published on: February 11, 2022

    相关实验视频

    Last Updated: Jun 20, 2026

    Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
    06:34

    Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

    Published on: October 28, 2020

    Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography
    07:11

    Morphological and Functional Assessment of the Right Ventricle Using 3D Echocardiography

    Published on: October 28, 2020

    Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China
    08:42

    Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China

    Published on: February 11, 2022

    科学领域:

    • 心脏病学 心脏病学
    • 诊断成像 诊断成像 诊断成像
    • 电子生理学 电子生理学

    背景情况:

    • 冠状动脉疾病 (CAD) 显著影响心肌功能,特别是在前部和顶部部分.
    • 评估区域性心肌功能障碍对于诊断和治疗严重的心脏病至关重要.
    • 矢量心脏图 (VCG) 提供了独特的心脏电活动的空间表示.

    研究的目的:

    • 确定横平面QRS循环向量心图 (VCG) 是否可以可靠地诊断冠状动脉疾病 (CAD) 患者前部和顶部心脏段的严重异能.
    • 为了确定特定的VCG循环模式,表明严重的心肌功能障碍.

    主要方法:

    • 在102名血管学证明的CAD患者中,对横平面QRS循环矢量心脏图 (VCG) 的分析.
    • 选择的患者在左心室图上表现出前腔和顶腔段的严重异能 (无动力或明显的低动力).
    • 这些患者的VCG环与那些不太严重的异能和正常对照者的VCG环的比较.

    主要成果:

    • 在102个VCG循环中,有84个被认为是严重异能.
    • 在这84个循环中,在82个循环中观察到一个均的异常模式.
    • 关键的发现包括以时针方向旋转的突出后向量,以及经常缺席或减少的早期前向力.

    结论:

    • 横平面QRS循环向量心脏学是诊断CAD患者心脏前部和顶部区域严重异能的一个有价值的工具.
    • 特定的VCG循环特征,特别是后向量旋转,高度暗示显著的心肌功能障碍.
    • VCG提供了在标准心电图 (ECG) 上可能不总是明显的诊断信息,在标准心电图 (ECG) 上显示出明显的变异性和较少的异常Q波.