概括
β-阻断剂,特别是脂性阻断剂,可以扰乱睡眠连续性并增加清醒. 这些中枢神经系统 (CNS) 影响在一项受控研究中在健康人群中观察到.
科学领域:
- 药理学 药理学是指药理学的学科.
- 神经科学是一个神经科学.
- 睡眠医学 睡眠医学
背景情况:
- 贝塔抑制剂是常见的处方药.
- 中枢神经系统 (CNS) 的副作用在使用β-阻断剂时经常被报告.
- 了解不同β抑制剂对中枢神经系统的影响对于患者护理至关重要.
研究的目的:
- 为了比较四种β-抑制剂 (atenolol,metoprolol,propranolol,pindolol) 和安慰剂对中枢神经系统功能的影响.
- 评估中枢神经系统功能的客观和主观测量,包括睡眠.
- 调查β-阻断剂脂性对中枢神经系统影响的影响.
主要方法:
- 双盲,安慰剂控制,拉丁方形设计研究.
- 30名健康的男性受试者接受了五种不同的治疗 (4种β抑制剂,1种安慰剂) 每个1周,每期2周的洗期.
- 评估包括多睡眠学,精神运动测试和关于情绪,睡眠和性功能的主观问卷.
主要成果:
- 与安慰剂和阿提诺洛尔相比,脂性β-阻断剂 (metoprolol,propranolol,pindolol) 在睡眠期间显著增加了觉醒和清醒.
- 宾多洛尔独特而显著地减少了快速眼动 (REM) 睡眠时间,并增加了REM延迟时间.
- 主观报告证实了客观发现,表明受脂性β-阻断剂治疗时,清醒度和不安度增加.
结论:
- 脂性是影响β抑制剂对中枢神经系统的关键因素,尤其是对睡眠连续性的副作用.
- 不同的β阻塞剂对睡眠结构具有不同的影响,而平多洛尔对REM睡眠有明显的影响.
- 这些发现强调了在评估与β抑制剂相关的中枢神经系统副作用时考虑单个药物特性的重要性.
相关概念视频
Adrenergic Antagonists: Chemistry and Classification of ɑ-Receptor Blockers
Adrenergic antagonists, or sympatholytics, inhibit adrenoceptor activation driven by catecholamines or agonists. Based on their adrenoceptor specificity, adrenergic blockers can be categorized into two primary groups: α-adrenergic blockers (α-blockers) and β-adrenergic blockers (β-blockers). α-blockers interact with α1 and α2 subtypes of α-adrenoceptors.
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline moieties. Phenoxybenzamine, with a haloalkylamine...
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline moieties. Phenoxybenzamine, with a haloalkylamine...
Adrenergic Antagonists: Chemistry and Classification of β-Receptor Blockers
β-adrenergic antagonists, or β-blockers, modulate the sympathetic nervous system by targeting β-adrenoceptors and inhibiting catecholamine-mediated sympathetic responses. β-blockers differ in their adrenoceptor subtype affinity, lipophilicity, and α-blocking capabilities. The history of β-blocker development began with the prototype, dichloroisoprenaline, which exhibited partial agonist activity. As a result, propranolol was developed as a pure antagonist but nonselective agent, paving the way...
Adrenergic Antagonists: Pharmacological Actions of β-Receptor Blockers
β-receptor blockers significantly impact the cardiovascular system by counteracting catecholamine-induced sympathetic responses. These medications decrease heart rate, contractility, and cardiac output, potentially leading to cardiac depression, life-threatening bradycardia, and death. Therapeutically, β-blockers function as mild antihypertensives and are utilized in treating angina pectoris and cardiac arrhythmias. However, nonselective β-blockers inhibit β2-receptors in bronchial smooth...
Antihypertensive Drugs: Action of β1 Blockers
β1-receptors are primarily located in the heart and kidneys. In cardiac myocytes, these receptors interact with neurotransmitters released by the sympathetic nervous system during heightened activity or danger. As a result, β1-receptors get activated, initiating a series of biochemical processes. Excessive activation of beta receptors due to chronic stress can abnormally increase heart rate and contractility, resulting in high blood pressure or hypertension. To counteract this, β1-blockers...
Antihypertensive Drugs: Types of β-Blockers
β receptors are classified into three subclasses: β1, β2, and β3. β1 receptors are primarily located in the heart and kidneys. When they get activated, they increase heart rate, contractility, and renin release. This process enhances blood pressure and aids in stress management. In contrast, β2 receptors are situated mainly in the lungs, blood vessels, and skeletal muscles. Upon activation, they trigger smooth muscle relaxation, causing bronchodilation and vasodilation. This widens airways and...
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers
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 indirectly block calcium...
