腹腔去极化-再极化的分散:在心律失常性右腹腔心肌病症中风险分层的非侵入性标志物
P Turrini1, D Corrado, C Basso
1Department of Pathology, University of Padua Medical School, Padua, Italy.
Circulation
|June 27, 2001
概括
在心律失常性右心室心肌病 (ARVC) 中,QRS分散是突然死亡的最强预测因素. 其他因素,如昏迷和QT分散,也有助于对ARVC患者的风险分层.
科学领域:
- 心脏病学 心脏病学
- 电子生理学 电子生理学
- 遗传性心脏疾病 遗传性心脏疾病
背景情况:
- 节律失调的右心室心肌病变 (ARVC) 是心脏突然死亡的重要原因.
- 确定ARVC患者突然死亡的可靠预测因素对于风险分层至关重要.
研究的目的:
- 评估临床和心电图 (ECG) 发现的预测价值,包括QT和QRS分散,用于ARVC患者的突然死亡风险.
主要方法:
- 从ARVC患者 (突然死亡受害者,持续的心室高心率,非持续的心室节律失常) 和对照者的心电图的回顾性分析.
- 手动测量QT间隔和QRS复合物的持续时间和可变性.
- 多变量分析以确定突发死亡的独立预测因素.
主要成果:
- 在ARVC患者中,QRS分散和QT分散显著更高,特别是那些经历过突然死亡的患者.
- QRS分散 (>=40毫秒) 显示90%的灵敏度和77%的特异性预测突然死亡.
- 阴性T波超出V(1) 和昏迷在突然死亡受害者中更为频繁.
结论:
- 在ARVC中,QRS分散是突然死亡的强大独立预测因素.
- 昏迷,QT分散 (>65毫秒),V以上的负T波进一步增强ARVC患者心律失常风险分层.
相关概念视频
01:19Electrophysiology of Normal Cardiac Rhythm
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase of...
01:30Cardiac Action Potential
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
01:30Dysrhythmias V: Evaluating Dysrhythmias
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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 IV: Restrictive Cardiomyopathy
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
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...