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ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

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Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
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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.
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The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
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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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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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隔離された冠動脈抽出症の患者の心拍動脈リスクマーカー

Forouzan Salari1, Hossein Nough2, Seyed Mostafa Seyedhosseini2

  • 1Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

International journal of cardiology. Cardiovascular risk and prevention
|September 2, 2025
PubMed
まとめ
この要約は機械生成です。

冠動脈切除 (CAE) の患者は,QT分散とP波分散が増加し,より高い電気的不安定性を示しています. これらのEKGマーカーは,エクタジアの重症度と相関し,リスク評価を助けます.

キーワード:
アリズム障害冠動脈エクタシアエレクトロカーディオグラムP波の分散QT分散

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科学分野:

  • 心臓病科
  • 電気生理学

背景:

  • 冠動脈エクタシア (CAE) はまれで,不律性のリスクと関連しています.
  • QT分散 (QTd) とP波分散 (PWD) のような心電図パラメータは,電気的不安定性を予測することができる.

研究 の 目的:

  • 孤立したCAEの患者と正常な冠動脈の患者のECGを比較する.
  • ECGのパラメータと冠動脈抽出症の程度との関係を調べる.

主な方法:

  • 23人の孤立したCAE患者と26人の対照群を比較したケース・コントロール研究.
  • 人口統計とリスク因子でグループを合わせた. 混同条件を除いた.
  • Chi-square,tテスト,ANOVA,および相関性を含む統計的テストを使用して分析されたECGパラメータ.

主要な成果:

  • CAE患者ではT波の逆転がより頻繁であった (52. 2% vs 11. 5%).
  • QTcは延長され,CAE患者ではQTd,QTcd,PWDが著しく増加した (P< 0. 05).
  • QTd,QTcd,PWDは,エクタティック血管数と正の相関関係にある (P<0.001).

結論:

  • 隔離されたCAE患者は,増加したQT分散とP波分散を示唆しています.
  • これらの心電図のパラメータは,エクタジアの範囲と分類と相関しており,リスクの階層化に役立ちます.