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相关概念视频

Electrocardiogram01:29

Electrocardiogram

7.2K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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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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Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
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Imaging Studies for Cardiovascular System I:Echocardiography01:17

Imaging Studies for Cardiovascular System I:Echocardiography

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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,...
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Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

13.8K
The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
13.8K

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相关实验视频

Updated: Mar 6, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

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支持深度学习的心电图系统用于检测左心室缩和预测心血管预后.

Zhe-Yu Yang1,2, Shi-Chue Hsing3, Dung-Jang Tsai4

  • 1Division of Family Medicine, Department of Family and Community Medicine, Tri-Service General Hospital, and School of Medicine, National Defense Medical University, Taipei, Taiwan, Republic of China.

BioData mining
|March 4, 2026
PubMed
概括

使用心电图 (ECG) 的新型深度学习 (DLM) 模型有效检测左心室缩 (LVH) 并预测心血管风险,提供更简单的查方法.

关键词:
人工智能的人工智能是人工智能.心血管疾病是什么心血管疾病深度学习是一种深度学习.电心电图 (ECG) 是一种心电图.左心室过度缩小的情况这就是Previvor.

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Evaluation of Left Ventricular Structure and Function using 3D Echocardiography
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Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

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相关实验视频

Last Updated: Mar 6, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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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

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科学领域:

  • 心脏病学 心脏病学
  • 人工智能的人工智能
  • 医学诊断 医学诊断 医学诊断

背景情况:

  • 左心室缩 (LVH) 影响15-20%的人口.
  • 目前对LVH的心电图标准缺乏敏感性和最佳预后价值.
  • 深度学习模型 (DLM) 显示出改善心血管风险评估的前景.

研究的目的:

  • 开发一个支持DLM的心电图系统来检测LVH.
  • 评估AI-ECG-LVH模型与心血管结果的预后关联.
  • 为LVH查和风险分层提供一种非侵入性工具.

主要方法:

  • 开发并验证了一种支持DLM的心电图系统 (AI-ECG-LVH),使用来自40736名患者 (A医院) 和6271名患者 (B医院) 的数据.
  • 从心声学中使用左心室质量指数 (LVMI) 定义的LVH.
  • 评估预后结果,包括急性心肌梗塞 (AMI),心力衰竭 (HF) 和心房动 (AFib).

主要成果:

  • 在外部验证中,AI-ECG-LVH模型实现了0.82 (男性) 和0.77 (女性) 的AUC.
  • 发生的AMI,HF和AFib的危险比率与心声学定义的LVH (ECHO-LVH) 相当.
  • AI-ECG-LVH显示了2.67 (AMI),3.15 (HF) 和2.23 (AFib) 的危险比率.

结论:

  • AI-ECG-LVH模型为LVH查提供了一种简单,负担得起和非侵入性的方法.
  • 这种AI-ECG-LVH系统有助于第一接触心血管风险分层.
  • 支持DLM的心电图分析代表了心血管诊断的重大进步.