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ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

1.1K
Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
1.1K
Conduction System of the Heart01:20

Conduction System of the Heart

5.1K
The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
5.1K
Conduction System of the Heart01:19

Conduction System of the Heart

14.5K
Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
14.5K
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

2.6K
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.
2.6K
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...
868
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

3.5K
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...
3.5K

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Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

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シヌスノードと心房不律

Roy M John1, Saurabh Kumar2

  • 1From Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA. rjohn2@partners.org.

Circulation
|May 12, 2016
PubMed
まとめ
この要約は機械生成です。

シヌスノード機能障害 (SND) と心房細動 (AF) は,共同心房改造のためにしばしば共存する. SNDとAFの治療は,AFまたは線維性心筋病気が優位であるかどうかにかかっています.

キーワード:
アブラション カテーテル心房細動動脈停止人工ペースメーカーシヌス症候群シノアトリアルノード

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Whole-Mount Immunofluorescence Staining, Confocal Imaging and 3D Reconstruction of the Sinoatrial and Atrioventricular Node in the Mouse
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Whole-Mount Immunofluorescence Staining, Confocal Imaging and 3D Reconstruction of the Sinoatrial and Atrioventricular Node in the Mouse

Published on: December 22, 2020

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Isolation of Atrial Myocytes from Adult Mice
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Isolation of Atrial Myocytes from Adult Mice

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関連する実験動画

Last Updated: Mar 21, 2026

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

Published on: July 5, 2021

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Whole-Mount Immunofluorescence Staining, Confocal Imaging and 3D Reconstruction of the Sinoatrial and Atrioventricular Node in the Mouse
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Whole-Mount Immunofluorescence Staining, Confocal Imaging and 3D Reconstruction of the Sinoatrial and Atrioventricular Node in the Mouse

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Isolation of Atrial Myocytes from Adult Mice
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Isolation of Atrial Myocytes from Adult Mice

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科学分野:

  • 心臓病科
  • 電気生理学
  • アトリアル病理学

背景:

  • シヌスノード機能障害 (SND) と心房不律,特に心房細動 (AF) はしばしば共存する.
  • SNDとAFを結びつける正確なメカニズムは,まだ完全に理解されていません.
  • この2つの状態は 心臓の構造と電気の改造を伴うものです

研究 の 目的:

  • シヌスノード病理学に関する現在の知識をレビューする.
  • 副鼻腔節疾患と心房不律の複雑な関係を解明する.
  • 病気のフェノタイプに基づく 量身の治療戦略を策定する.

主な方法:

  • SNDとAFに関する現代の研究の文献レビュー.
  • 遺伝的および構造的要因を含む病理生理学的メカニズムの分析
  • 統合されたSNDとAFの治療方法に関する情報の統合

主要な成果:

  • SNDはAFからの電気的改造によって引き起こされるか,両方の状態が進行的な心房構造改造によって発生する可能性があります.
  • 心房細動はしばしば左心房のトリガーと基板と関連しています.
  • シヌス節の機能障害は 構造的な変化に結びついています 特に右心房です

結論:

  • SNDとAFの治療戦略は,主たる表型に基づいて個別化されなければならない.
  • AFと二次性SNDの患者にはカテーテル除去が有益です.
  • 心臓のペースを調節する治療は,心房線維性心筋病気が優勢である患者の主要な治療法です.