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関連する概念動画

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

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

160
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...
160
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

52
Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Cardiac Catheterization III: Left Heart Catheterization01:24

Cardiac Catheterization III: Left Heart Catheterization

203
Left heart catheterization is an invasive diagnostic procedure used to evaluate the function and structure of the left side of the heart. It is generally performed to diagnose and treat cardiovascular conditions such as valve abnormalities, coronary artery disease, and congenital heart defects.Diagnostic and therapeutic purposesLeft heart catheterization serves various diagnostic and therapeutic purposes, including:Assessing coronary artery bypass grafts.Evaluating coronary artery disease in...
203
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

1.2K
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 heart...
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Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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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.
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Updated: Sep 9, 2025

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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暗号性脳卒中,左心房機能,心房動:複雑な関係

Francesca Augusta Gabrielli1, Gianluigi Bencardino2, Antonio Di Renzo3

  • 1Cardiology Department, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy. francescaaugusta.gabrielli@policlinicogemelli.it.

Clinical research in cardiology : official journal of the German Cardiac Society
|September 2, 2025
PubMed
まとめ

左心房体積指数 (LAVi) と心房回声検査で測定された心房張力 (LASct) は,源不明 (ESUS) の患者における心房動 (AF) を予測することができる. これらの指標は,AF検出のためのループレコーダーのモニタリングから利益を得る患者を選択するのに役立ちます.

キーワード:
心房細動挿入式ループレコーダースペックル・トラッキング・エコーカーディオグラフィー脳卒中

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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
08:10

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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
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Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure

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科学分野:

  • 心臓病科
  • 神経学
  • 医療用イメージング

背景:

  • パロキシズム性心房細動 (AF) は,原因不明の栓塞性脳卒中 (ESUS) の潜在的な原因である.
  • ループレコーダー (LR) はAFを検出しますが,ESUS患者での広範な使用は費用対効果が低い可能性があります.
  • SPECKLE TRACKING ECHOCARDIOGRAPHY (STE) を用いた左心房機能の評価は,ESUSの患者がLRモニタリングから恩恵を受ける可能性があることを特定することができます.

研究 の 目的:

  • STEによって評価されたLA機能が,AF検出のためのLRモニタリングから利益を得られるESUS患者を特定できるかどうかを評価する.
  • ESUS患者におけるAF発生に対するLA機能パラメータの予測値を決定する.

主な方法:

  • 2020年から2023年の間に連続してLRインプラントとエコーカルディオグラフィーを受けたESUS患者は登録されました.
  • 患者は,LRによるAF検出に基づいて,平均10. 0ヶ月のフォローアップ期間中にグループ化されました.
  • 左心室の体積指数 (LAVi) と,左心室の縦断 (LASr, LASct) は,STEを用いて測定された.

主要な成果:

  • AF患者27人 (42. 2%) とAF患者37人 (57. 8%) が対象となった.
  • AF群は,非AF群と比較して,著しく高いLAVi (44. 7対34. 4mL/ m2) と低いLASr (19. 7%対27. 4%) とLASct (7. 4%対12. 4%) を示した.
  • 多変量分析により,LAViとLASctはAFの独立予測因子として特定されました.

結論:

  • 左心房体積指数 (LAVi) とLA収縮ストレンス (LASct) は,ESUS患者におけるAFの信頼性の高い予測指標である.
  • これらのエコーカルディオグラフィのパラメータは,AF検出のためのループレコーダーのインプラントから最も恩恵を受ける可能性が高いESUS患者の選択に役立ちます.