自主神经系统和突然的心脏死亡. 对心肌梗塞后风险分层的实验基础和临床观察
P J Schwartz1, M T La Rovere, E Vanoli
1Dipartimento di Medicina, Università di Pavia, Italy.
Circulation
|January 1, 1992
概括
评估自主控制标志物,如心率变化,可以识别心肌梗塞后心脏突然死亡的高风险患者. 阴道活动似乎具有保护性,而交感激活可以引发致命的心律失常.
科学领域:
- 心脏病学 心脏病学
- 自主神经系统研究 自主神经系统研究
- 心脏电生理学 心脏电生理学
背景情况:
- 自主神经系统失衡与心肌梗塞后心脏突然死亡有关.
- 交感激活可以导致恶性心律不整,而阴道活动提供保护.
- 了解同心 - 阴道相互作用对于预测心室动风险至关重要.
研究的目的:
- 调查自主控制的间接标志物,以识别心肌梗塞后高风险患者.
- 探索阴道活动和交感激活在决定心房动或生存等结果中的作用.
- 为了评估急性心脏病死亡时巴罗反射灵敏度和心率波动的预测值.
主要方法:
- 狗和猫的实验模型分析了心肌缺血期间的自主反应.
- 直接的神经记录和电刺激评估了阴道活动的作用.
- 前性临床研究研究了心率变化和心肌梗塞后心肌梗塞患者的呼吸反射灵敏度.
- 目前正在进行的ATRAMI研究将在1200名患者中评估这些标志物.
主要成果:
- 抑郁的反射慢性反应和心率变化降低确定了狗具有较高的心律失常风险.
- 在缺血期间强烈的反射阴道激活与对猫的心室的保护有关.
- 在心肌梗塞后的患者中降低了巴罗反射灵敏度或心率变化,与较高的心脏死亡率相关.
结论:
- 心活动的标记物,如巴罗反射灵敏度和心率变异性,在心肌梗塞后风险分层方面表现有前途.
- 在大型ATRAMI前性研究中,正在进行进一步的验证.
- 这些发现可能有助于更好地识别患有心脏突然死亡风险的患者.
相关概念视频
01:28Mechanism 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.
01:30Coronary Artery Disease III: Clinical Manifestations
Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
01:19Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations
The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
01:30Acute Coronary Syndrome III: Diagnostic Studies
Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
01:25Cardiomyopathy I: Introduction and Classification
Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...