导管切除或抗心律失常药物用于心室动脉缩
John L Sapp1, Anthony S L Tang2, Ratika Parkash1
1QEII Health Sciences Centre, Dalhousie University, Halifax, NS, Canada.
The New England journal of medicine
|November 18, 2024
概括
与抗心律药物相比,导管切除显著降低了缺血性心肌病和腹腔心动减速症患者的不良事件风险. 这一初步策略为管理这一高风险患者群体提供了更安全,更有效的治疗选择.
科学领域:
- 心脏病学 心脏病学
- 电力生理学 电力生理学
- 临床试验 临床试验
背景情况:
- 患有缺血性心肌病和腹腔性心力衰竭的患者面临高风险的不良结果.
- 抗心律失常药物是一种常见的治疗方法,但它们在抑制腹腔动脉高心率的有效性往往有限.
- 导管切除与抗失律药物作为一线治疗的比较有效性仍然不确定.
研究的目的:
- 为了比较导管切除与抗不律性药物治疗的疗效和安全性,作为患有缺血性心肌病的患者中腹腔动脉障碍的第一线治疗.
主要方法:
- 一项国际随机试验将416名患有心肌梗塞和显著腹腔动脉冲动症的患者分配给导管切除或抗失律药物治疗 (sotalol或amiodarone).
- 所有患者都配备了可植入式心脏转换器-除器 (ICD).
- 主要终点是所有原因的死亡或随机化后14天以上的复合死亡,心室低心率风暴,适当的ICD冲击或需要医疗干预的持续心室低心率.
主要成果:
- 经过4.3年的中位数随访后,导管切除组中50.7%的患者出现了主要终点,而药物治疗组中为60.6% (危险比,0.75;P=0.03).
- 在切除组中,在手术后30天内发生的不良事件包括死亡 (1.0%) 和非致命事件 (11.3%).
- 在药物治疗组中,因抗不律性药物而产生的不良事件包括死亡 (0.5%) 和非致命事件 (21.6%).
结论:
- 导管切除的初始策略表明,与抗心律失常药物治疗相比,在患有缺血性心肌病和腹腔心动减速症的患者中,复合初级终点的风险较低.
- 导管切除似乎是这种患者群体更有效的第一线治疗方法.
相关概念视频
01:28Disturbances in Heart Rhythm
908
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...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
908
01:20Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers
782
Class IV antiarrhythmic drugs, such as verapamil and diltiazem, block calcium channels. They primarily affect the heart, slowing the conduction in calcium-dependent tissues like the SA and AV nodes. These drugs manage reentrant supraventricular tachycardia (SVT) and reduce ventricular rate in atrial flutter/fibrillation.
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
782
01:24Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers
707
Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
707
01:12Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
911
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...
911
01:22Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers
1.2K
Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
1.2K
01:28Mechanism of Cardiac Arrhythmias
891
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.
891