the main goal of this report was to share with clinicians an atypical presentation of pulmonary thromboembolism (pte) in a young male`s post-appendectomy, whom he had no significant predisposing factors for such disease. the case also introduced for re-examining the challenges of pte clinical manifestations which may mimic other differential diagnosis. pte is an abrupt blockage of the pulmonary...

Chronic ligation of one pulmonary artery results in pulmonary vascular remodeling and bronchial angiogenesis, collectively known as postobstructive pulmonary vasculopathy (POPV). To investigate pulmonary vascular reactivity in POPV, we ligated the left main pulmonary artery of guinea pigs and, after 1-10 mo, prepared explants by inflating lungs with agarose and sectioning them into approximatel...

ALTHOUGH chronic fibrous mediastinitis is responsible for 8 to 23% of the cases of superior vena caval obstruction,1-7 it may also compress or obstruct other mediastinal structures. Involvement of the tracheobron-chial tree" 8, 9pulmonary artery,10-12 esophagus ," 9, 13 aorta, and coronary arteries14 has been reported. Obstruction of pulmonary veins, however, is uncommon and may not be recogniz...

Most commonly, atrial fibrillation is triggered by rapid bursts of electrical impulses originating in the myocardial sleeves of pulmonary veins (PVs). However, the nature of such bursts remains poorly understood. Here, we propose a mechanism of bursting consistent with the extensive empirical information about the electrophysiology of the PVs. The mechanism is essentially non-local and involves...

BACKGROUND A robotic catheter navigation system has been developed that provides a significant degree of freedom of catheter movement. This study examines the feasibility of synchronizing this robotic navigation system with electroanatomic mapping and 3-dimensional computed tomography imaging to perform view-synchronized left atrial (LA) ablation. METHODS AND RESULTS This study consisted of a...

1. Portal veins, vena cavae and pulmonary arteries from spontaneously hypertensive (SH) rats were found to undergo medial smooth-muscle hypertrophy when compared with corresponding blood vessels from ageand sex-matched WisterKyoto (WKy) normotensive rats. There was an increase in the density of the mucopolysaccharide and glycoprotein staining in veins, pulmonary arteries vena venorum and ventri...

Isolation of the pulmonary veins has been used as surgical treatment for atrial fibrillation (AF) from the early 90s, as it was incorporated in the Maze procedure. With the evidence that triggers form this area can induce AF, the Maze III procedure has been adapted and modified towards a single lesion around the pulmonary veins for the treatment of paroxysmal and chronic AF in some centers. New...