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Updated: Aug 17, 2026

Electrophysiological Assessment of Murine Atria with High-Resolution Optical Mapping
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Electrophysiological Assessment of Murine Atria with High-Resolution Optical Mapping

Published on: February 22, 2018

複数のQRS形態を持つ持続した心室性短心症を引き起こすメカニズム:心臓発作の犬の心臓のマッピング研究の結果

C Costeas1, N S Peters, B Waldecker

  • 1Department of Pharmacology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.

Circulation
|December 13, 1997
PubMed
まとめ

同じ心臓における多発性心房短動脈 (VT) 形態は,しばしば同じ心臓発作領域から発生する. 異なるリエントラント回路の特性により,これらの多様なVTプレゼンテーションが説明されます.

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Mechanism of Cardiac Arrhythmias

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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Disturbances in Heart Rhythm

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.
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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.