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Updated: May 30, 2025

Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
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Published on: January 16, 2019

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长 QT 综合征:LQT3 变体在一个胸心病的新生儿中呈现

Catarina Afonso1, Débora A Mendes2, Rita V Queirós3

  • 1Family Medicine, USF (Unidade de Saúde Familiar) Afonsoeiro, Unidade Local de Saúde do Arco Ribeirinho, Montijo, PRT.

Cureus
|January 27, 2025
PubMed
概括

长QT综合征 (LQTS) 是一种罕见的遗传疾病,影响心脏再极化. 这份病例报告详细介绍了一名新生儿被诊断患有LQT3,这是一种罕见的变异,突出了早期检测的挑战.

关键词:
胸肌梗塞是什么意思 胸肌梗塞是什么意思长时间QT综合征在 lqt3 变体中,lqt3 变体是什么?新生儿新生儿的新生儿这种药物是propranolol.

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Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers

Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
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Disturbances in Heart Rhythm01:28

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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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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.
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Ionic Basis of Cardiac Action Potentials
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