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相关概念视频

Electrocardiogram01:29

Electrocardiogram

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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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Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

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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...
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Coronary Artery Disease I: Introduction01:30

Coronary Artery Disease I: Introduction

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Coronary Artery Disease (CAD): An Overview with Scientific InsightsCoronary Artery Disease (CAD), often referred to as C-A-D, is a prevalent blood vessel disorder classified under the broader category of atherosclerosis. Atherosclerosis is a pathological process characterized by the hardening and narrowing of arteries due to the accumulation of atherosclerotic plaques. These plaques are composed of cholesterol, fatty substances, inflammatory cells, calcium, and fibrin, reducing blood flow to...
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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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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
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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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相关实验视频

Updated: Jan 12, 2026

Author Spotlight: Integrated Multi-Omics Analysis for Unveiling Multicellular Immune Signatures in Clinical Heart Attack Cohorts
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整合ECG衍生特征与传统的CVD风险模型.

Maryam Mahdavi1, Anoshirvan Kazemnejad2, Abbas Asosheh3

  • 1Department of Biostatistics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.

Scientific reports
|November 7, 2025
PubMed
概括

电心电图 (ECG) 功能改善了女性心血管疾病 (CVD) 风险预测,优于弗雷明汉风险评分 (FRS). 这增强了针对个性化的预防策略的早期检测.

关键词:
在CVD中,CVD是非常重要的.这是一个ECG信号.对于NRI和IDI来说,这是一个很好的选择.预测模型的预测模型.

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科学领域:

  • 心脏病学 心脏病学
  • 预防医学 预防医学
  • 生物医学信号处理

背景情况:

  • 非传染性疾病 (NCD),特别是心血管疾病 (CVD),是全球主要的死亡原因.
  • 伊朗面临高于平均水平的心血管疾病发病率和死亡率.
  • 早期发现心血管疾病至关重要,因为它经常无症状地进展.

研究的目的:

  • 评估心电图 (ECG) 信号特征对发生心血管疾病的预测能力.
  • 将基于心电图的风险预测与弗雷明汉风险评分 (FRS) 进行比较.
  • 评估在一个大队伍中对风险分层进行心电图信号处理.

主要方法:

  • 在德黑兰脂质和葡萄糖研究 (TLGS) (2006-2008) 中,利用了4,637名成年人 (年龄≥40) 的心电图数据的信号处理.
  • 随访参与者10年,以确定发生的心血管疾病 (冠心病或中风).
  • 使用哈雷尔的C指数,NRI和IDI进行了重新校准的FRS模型与没有心电图特征的比较.

主要成果:

  • 在10年内,483名参与者 (10.4%) 患有心血管疾病.
  • 电图特征显著改善了女性心血管疾病风险预测 (C指数:0.84至0.85;NRI:55.7%;IDI:2.8%).
  • 在男性中没有发现明显的改善;在中等风险的女性中,心电图模型的表现优于FRS.

结论:

  • 整合ECG信号特征可以增强心血管疾病预测模型,特别是在女性身上.
  • 基于心电图的风险分层显示了改善心血管疾病个性化预防策略的潜力.
  • 需要进一步的研究来完善ECG工具的临床应用.