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関連する概念動画

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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Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Cardiac Action Potential01:30

Cardiac Action Potential

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Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
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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...
867
Ischemic Heart Disease: Overview01:17

Ischemic Heart Disease: Overview

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Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and...
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このページは機械翻訳されています。他のページは英語で表示される場合があります。View in English
  1. ホーム
  3. 研究分野
  5. 生物医学と臨床科学
  7. 心血管医学と血液学
  9. 心臓病 (心血管疾患を含む)
  11. Inoca患者におけるp波ピーク時間の予測:パイロット研究

INOCA患者におけるP波ピーク時間の予測:パイロット研究

Muhammet Salih Ateş1, Erdoğan Sökmen1

  • 1Department of Cardiology, Kırşehir Ahi Evran Training and Research Hospital, Kırşehir, Turkey.

Journal of electrocardiology
|September 6, 2025

関連する実験動画

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

Published on: December 28, 2012

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Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography
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Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography

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Bidirectional Electrical and Optoelectronic Interfaces in Healthy and Ischemic Ex Vivo Rat Hearts
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Bidirectional Electrical and Optoelectronic Interfaces in Healthy and Ischemic Ex Vivo Rat Hearts

Published on: July 18, 2025

255

PubMed で要約を見る

まとめ
この要約は機械生成です。

ECGにおけるP波ピーク時間 (PWPT) の延長は,非閉塞性冠動脈 (INOCA) の患者における心筋不全と関連している. この心電図マーカーは,特に鉛のDIIで,冠動脈微小血管機能不全を特定するのに役立ちます.

科学分野:

  • 心臓病科
  • 診断用心電図
  • 発血性心臓病

背景:

  • 非阻害性冠動脈 (INOCA) による血栓不全は診断上の課題であり,しばしば冠動脈微小血管機能不全 (CMD) と関連している.
  • INOCA患者における缺血を予測する非侵襲的な心電図マーカーは臨床的に有意である.
  • P波ピーク時間 (PWPT) は,心房伝導を反映する心電図指標であり,潜在的に性不全病理学に関連している.

研究 の 目的:

  • INOCA患者におけるP波ピーク時間 (PWPT) と心筋不全症との関連を調査する.
  • INOCAでは,PWPTを,有意な不血症と冠動脈微小血管機能障害 (CMD) を特定するための非侵襲的マーカーとして評価する.

主な方法:

  • 冠動脈血管図とSPECT心筋 perfusion imaging (MPI) を受けた444人のINOCA患者による遡及観察研究.
  • リードDIIとV1のP波インデックスはデジタルで測定された.
  • 多変量ロジスティック回帰とROC分析を使用して,有意な缺血 (> 10%) の予測要因を特定し,PWPTの判別力を評価した.

主要な成果:

  • リードDIIとV1における長期PWPTは, > 10%の可逆性心筋不全と有意に関連していた.
  • PWPT- DIIは,PWPT- V1 (AUC 0. 76) を上回る強力な識別力 (AUC 0. 82) を示した.
キーワード:
耳前電気生理学冠動脈微小血管機能障害エレクトロカルジオグラフィー

関連する実験動画

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

Published on: December 28, 2012

24.4K
Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography
09:23

Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography

Published on: November 24, 2016

13.4K
Bidirectional Electrical and Optoelectronic Interfaces in Healthy and Ischemic Ex Vivo Rat Hearts
08:40

Bidirectional Electrical and Optoelectronic Interfaces in Healthy and Ischemic Ex Vivo Rat Hearts

Published on: July 18, 2025

255
  • PWPT- DII,PWPT- V1,年齢,糖尿病,およびE/ e'比は,多変量分析において有意な缺血の独立予測指標であった.

    • 結論:

    • PWPTの上昇,特に鉛のDIIは,INOCA患者の心筋不全と独立して関連しています.
    • PWPTは,INOCAにおけるCMDのリスク分層と早期発見のための価値ある非侵襲的なツールとして機能します.
    • PWPTをECGの解釈に統合すると,正常な冠動脈血管図と不血症の症状を有する患者の診断能力が向上する可能性があります.
    イノカ
    血栓不全
    心筋 perfusion イメージング
    P 波