延迟的QT延长和心转动后的电风暴
Edward Dababneh1, Dylan Young1, Sachin Nayyar1
1Department of Cardiology, Division of Specialist Medical Services, Gold Coast Hospital and Health Services, Southport, QLD 4215, Australia; Department of Medicine, Griffith University School of Medicine, Parklands Dr, Southport, QLD 4215, Australia.
Journal of electrocardiology
|September 29, 2025
概括
推迟的Torsades de Pointes (TdP) 在心房的患者中发生在电动心脏转变后66小时. 这凸显了高风险患者危险心律失常的关键心脏转换后窗口.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
背景情况:
- 电动心脏转换是对心房的常见治疗方法.
- 已知QT延长和Torsades de Pointes (TdP) 是与心转变和某些药物相关的已知风险.
研究的目的:
- 报告一个电动心转动后推迟Torsades de Pointes (TdP) 的病例.
- 为了强调心脏转变后的前节律失常的脆弱窗口.
主要方法:
- 一个68岁的女性的案例研究,在电动心脏转换后出现延迟TdP.
- 治疗包括停止Sotalol治疗,电解质校正,复苏和暂时的过度驱动节奏.
主要成果:
- 患者在心转动后大约66小时经历了与心相关的TdP.
- 随着步伐的加快,QTc 间隔正常化,没有进一步的心律失常事件发生.
结论:
- 在心脏转变后的几天内存在前节律失常的脆弱窗口,特别是在具有多个QT延长风险因素的患者中.
- 扩展的心电图监测和考虑早期节奏是预防高危人群危及生命的心律失常的关键.
相关概念视频
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
469
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...
469
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
1.9K
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...
1.9K
Cardiac Action Potential
5.8K
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.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
5.8K
Disturbances in Heart Rhythm
2.5K
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...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
2.5K
Electrocardiogram
5.4K
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.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
5.4K
Dysrhythmias VI: Management of Dysrhythmias
432
Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
432


