نتایج جستجو برای: paroxysmal event
تعداد نتایج: 215414 فیلتر نتایج به سال:
BACKGROUND In patients with syncope and bundle branch block (BBB), syncope is suspected to be attributable to a paroxysmal atrioventricular (AV) block, but little is known of its mechanism when electrophysiological study is negative. METHODS AND RESULTS We applied an implantable loop recorder in 52 patients with BBB and negative conventional workup. During a follow-up of 3 to 15 months, synco...
A60-year-old man suffered from paroxysmal episodes of palpitations, angina, and shortness of breath lasting 5 to 10 minutes. The episodes occurred about twice a month and were not related to physical activity or stress. Resting-, exerciseand Holter-ECG and the clinical examination revealed no abnormalities. A coronary angiogram showed only mild coronary artery disease, with no significant steno...
Video-EEG monitoring (v-EEG) was originally restricted to the evaluation for epilepsy surgery. It is now widely available and often utilized to clarify the nature of paroxysmal events or to identify the epileptic syndrome. It is important to define carefully the diagnostic value of this high-cost and time-consuming procedure. Few data on children are available. In this study, we have evaluated ...
BACKGROUND The long-term natural history of lone atrial fibrillation is unknown. Our objective was to determine the rate and predictors of progression from paroxysmal to permanent atrial fibrillation over 30 years and the long-term risk of heart failure, thromboembolism, and death compared with a control population. METHODS AND RESULTS A previously characterized Olmsted County, Minnesota, pop...
Brugada syndrome is characterized by marked ST-segment elevation in the right precordial leads (Bru-ECG) and is associated with a high risk for sudden death. However, it is unclear whether the arrhythmogenesis is caused by the mechanisms responsible for Bru-ECG. The present study investigated the risk of arrhythmias in patients with Bru-ECG by retrospectively analyzing 30 patients (28 men; mean...
We study numerically and analytically first- and second-order phase transitions in neuronal networks stimulated by shot noise (a flow of random spikes bombarding neurons). Using an exactly solvable cortical model of neuronal networks on classical random networks, we find critical phenomena accompanying the transitions and their dependence on the shot noise intensity. We show that a pattern of s...
BACKGROUND Substrate abnormality in pulmonary vein (PV) antrum plays a critical role in mechanism of atrial fibrillation (AF). The present study compares the strategy of PV antrum radial-linear (PAR) ablation to encircling PV isolation for paroxysmal AF. METHODS AND RESULTS A total of 86 patients with paroxysmal AF were randomly assigned to PAR ablation group or PV isolation group. The averag...
Tsau, Yang, Li Guan, and Jian-Young Wu. Initiation of spontaWith the use of different in vitro models the paroxysmal neous epileptiform activity in the neocortical slice. J. Neurophysevents appear different in local field potential recordings. In iol. 80: 978–982, 1998. Cortical local circuitry is important in bicuculine and high [K] models the paroxysmal events apepileptogenesis. Voltage-sensi...
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