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相关概念视频

Heart Sounds01:15

Heart Sounds

Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
Assessment of the Cardiovascular System IV: Auscultation01:25

Assessment of the Cardiovascular System IV: Auscultation

Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
Cardiovascular System Abnormal Findings II: Auscultation01:25

Cardiovascular System Abnormal Findings II: Auscultation

Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
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...
Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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...
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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相关实验视频

Updated: Jul 12, 2026

Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice
12:12

Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice

Published on: February 14, 2017

在与系统性动脉干覆盖心室隔膜的疾病相关的回声心声学和对比研究:心室隔膜缺陷的动脉干,Fallot四分法和肺动脉缺陷与心室隔膜缺陷的肺动脉缺陷.

J L Assad-Morell, J B Seward, A J Tajik

    Circulation
    |April 1, 1976
    PubMed
    概括

    在先天性心脏缺陷中的心声图像,如动脉和法洛特四分法,揭示了关键的共同特征. 左心房尺寸有效地表明肺血流量,区分增加和减少的流量状态.

    更多相关视频

    Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery
    04:48

    Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery

    Published on: November 28, 2018

    Closed Chest Biventricular Pressure-Volume Loop Recordings with Admittance Catheters in a Porcine Model
    07:56

    Closed Chest Biventricular Pressure-Volume Loop Recordings with Admittance Catheters in a Porcine Model

    Published on: May 18, 2021

    相关实验视频

    Last Updated: Jul 12, 2026

    Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice
    12:12

    Echocardiographic Approaches and Protocols for Comprehensive Phenotypic Characterization of Valvular Heart Disease in Mice

    Published on: February 14, 2017

    Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery
    04:48

    Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery

    Published on: November 28, 2018

    Closed Chest Biventricular Pressure-Volume Loop Recordings with Admittance Catheters in a Porcine Model
    07:56

    Closed Chest Biventricular Pressure-Volume Loop Recordings with Admittance Catheters in a Porcine Model

    Published on: May 18, 2021

    科学领域:

    • 儿童心脏病学 儿童心脏病学
    • 遗传性心脏病是一种先天性心脏病.
    • 心声回声扫描 (Echocardiography) 是一种心声回声扫描.

    背景情况:

    • 动脉,法洛特四重症,以及与VSD相关的肺动脉缩是复杂的蓝色心脏病.
    • 声心图对于诊断和管理这些疾病至关重要.
    • 识别特定的心声回声学标记可以帮助区分和评估肺血流.

    研究的目的:

    • 为了确定与VSD. truncus arteriosus,Fallot的四分法,和肺动脉缩的患者常见的回声心脏学特征.
    • 为了评估印氨酸绿色对比性心电回声学在评估变速器的实用性.
    • 为了确定左心房尺寸是否能区分增加和减少的肺血流.

    主要方法:

    • 62名患有这些疾病的患者进行了心声扫描.
    • 印ocyanine绿色对比被用于研究流动模式和变流.
    • 测量了左心房尺寸,并与肺流相关联.

    主要成果:

    • 共同特征包括一个大型的系统性动脉干,中枢半月连续性,大RV维度和正常的隔膜运动.
    • 印ocyanine绿色对比有助于检测ASD和评估变位.
    • 与增加流量 (TA) 患者相比,肺流量减少 (TOF,PA-VSD) 的患者的左心房尺寸显著较小.

    结论:

    • 心声学揭示了这些复杂的蓝色心脏病的共同特征.
    • 左心房尺寸是评估肺血流量的可靠指标.
    • 这种测量有助于区分肺流量增加的情况与肺流量减少的情况.