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相关概念视频

Electrocardiogram01:29

Electrocardiogram

2.2K
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...
2.2K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

519
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...
519
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

907
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
907
Pulse rhythm01:30

Pulse rhythm

768
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
768
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

891
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
891
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

3.4K
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...
3.4K

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相关实验视频

Updated: Jun 6, 2025

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
10:17

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

Published on: April 11, 2025

417

在心电图中通过人工智能驱动的分析识别心室功能障碍指标.

Hisaki Makimoto1,2,3,4, Takayuki Okatani2, Masanori Suganuma2

  • 1Cardiovascular Centre, Jichi Medical University, Shimotsuke 329-0498, Japan.

Bioengineering (Basel, Switzerland)
|November 27, 2024
PubMed
概括
此摘要是机器生成的。

人工智能可以使用心电图 (ECG) 检测心室功能障碍. 双节拍心电图和特定波形段,特别是从P波到T波,提供了最精确的分类.

关键词:
人工智能的人工智能是人工智能.电心电图 (ECG) 是一种心电图.腹腔室功能障碍是什么意思

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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

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相关实验视频

Last Updated: Jun 6, 2025

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

Published on: April 11, 2025

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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

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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:

  • 人工智能 (AI) 在通过心电图 (ECG) 来识别心室功能障碍方面表现有前途.
  • 具体的心电图波形表明心脏功能障碍仍然在很大程度上未被定义.
  • 在临床实践中,评估心室功能的准确,非侵入性方法至关重要.

研究的目的:

  • 使用心电图数据开发和验证人工智能模型,用于检测使用心电图数据的左心室喷射率 (LVEF) 降低.
  • 为了确定特定的心电图配置和波形段,最有效的诊断心室功能障碍.
  • 确定不同心电图导线和段的诊断效用,以评估心脏功能.

主要方法:

  • 分析了来自日本和德国的17422名患者的心电图和心声回声数据.
  • 开发10层卷积神经网络 (CNN) 用于LVEF分类 (<50%).
  • 使用四倍交叉验证对各种心电图配置 (3s条,单拍,两拍叠加) 和段 (PQRST,QRST,P,QRS,PQRS) 的模型性能进行评估.

主要成果:

  • 与单拍和3s条形模型相比,两拍心电图配置在检测心室功能障碍方面表现优异.
  • 单拍模型确定了肢体领头部I和aVR作为功能障碍的特别迹象.
  • 从QRS复合体到T波的心电图段是最有信息的,而P波段进一步提高了诊断准确性.

结论:

  • 通过人工智能处理的双节拍心电图分析,可以非常精确地对心室功能进行分类.
  • 特定的心电图段,特别是从P波到T波的特定心电图段,更有效地评估心室功能障碍.
  • 电脑心电图导线I和aVR在评估心室功能障碍方面具有显著的诊断效用.