... the 2 lower chambers are the right and left ventricles. The heart also has an electric system that ... the upper chambers of the heart called atrial fibrillation. If a patient with an accessory pathway develops ...

Change of the retrograde atrial activation sequence during radiofrequency (RF) ablation of left-side accessory pathway can be due to another accessory pathway, another mechanism for the tachycardia, or due to intraatrial conduction block, partial or complete, caused by RF delivery to a site proximal to the site of ...

... the left atrium, which then empties into the left ventricle. The left ventricle then pumps blood out to the body. The ... who have other atrial arrhythmias such as atrial fibrillation (a more irregular form of atrial rhythm abnormality). ...

Histopathologically, accessory atrioventricular (AV) pathways comprise tiny strands of working myocardium that traverse the AV groove and link between the atrial and ventricular myocardium. Antegrade and retrograde conduction in bidirectional accessory pathways have generally been considered to occur along the same fibers. This report ...

We report on a 22-month-old boy with drug-resistant atrioventricular reentrant tachycardia and complex structural heart disease consisting of right atrial isomerism, mirror image orientation of the intrathoracic veins, hemi-azygos continuation to the left superior vena cava, separate drainage of the hepatic veins into the left-sided ...

Recently contrast-enhanced cardiac computed tomography (CT) was found to be useful for imaging the left atrium and pulmonary veins (PVs) before radiofrequency catheter ablation in patients with atrial fibrillation. However, the risks of contrast agent in patients with impaired renal function must be considered. We investigated the accuracy of low-dose ...

Coinciding left bundle-branch block and Wolff-Parkinson-White syndrome type B, a very rare electrocardiographic occurrence, was found in a patient with dilated cardiomyopathy. Electrophysiologic study revealed eccentric retrograde atrial activation during ventricular pacing, suggesting right-sided accessory pathway. At programmed ...

... left atrial myxomas. Treatment is necessary to avoid metastasis and the formation of clots. In addition, untreated ...

Left Atrial Volume; Hypertensive Heart Disease; Antihypertensive Drugs; Diastolic Function; Renin Angiotensin System

We report a rare case of concomitant pulmonary embolectomy and excision of a left atrial myxoma. A 64-year-old obese woman developed a pulmonary embolism 13 days after an operation for a brain tumor. Echocardiography revealed a 3-cm left atrial mass attached to the atrial septum. Urgent ...

The purpose of this study was to determine if the electrophysiologic properties and the anatomic location of manifest accessory pathways affect the local electrogram intervals recorded at sites of successful radiofrequency ablation. Accessory pathways in 149 consecutive patients were categorized according to their anatomic location on the basis of the site ...

A patient with antecedents of ischemic cardiopathy is presented. Echocardiographic exploration revealed the presence of an accessory cavity in connection with the left ventricle behind the basal segment of the posterior left ventricular wall, the characteristics of which were compatible with a ventricular pseudoaneurysm. The Doppler ...

A 41-year-old female with Down's syndrome and severe aortic regurgitation underwent homograft aortic root replacement. During the operation, surgical glue was applied which appeared to have inverted the left atrial appendage giving an appearance of a left atrial mass. PMID:17670275

... age, gender, the kind of disease, left atria, left ventricle, ejection ... atrial fibrillation patients Table 4c The correlation results among the ... ...

Intracardiac defects such as atrial septal defect (ASD) and patent foramen ovale (PFO) are common forms of congenital intracardiac apertures which can be successfully closed percutaneously. Since the initial description of an atrial septal defect closure device in the mid 1970s by King and Mills, transcatheter closure of atrial septal ...

Two dogs, one immature and one adult, were presented with a history of progressive ascites. In a third, immature dog, increasing exercise intolerance had been noted. Echocardiography demonstrated a partition in the right atrium (cor triatriatum dexter) and echocontrast studies documented normal flow from the cranial vena cava into the right atrium and ventricle. A saphenous vein contrast study ...

OBJECTIVE--To investigate left atrial chamber stiffness and its influence on left atrial and left ventricular functions in hypertrophic cardiomyopathy. DESIGN--Prospective study. SETTING--Department of internal medicine in a university teaching hospital. PATIENTS--Five control subjects, six ...

A 71 year old man was referred for MRI investigation of the heart. He had a history of progressive dyspnea. Due to his echocardiographical findings and the known history of permanent atrial fibrillation, his cardiologist suspected atrial thrombi. MRI investigation of the heart showed a left atrial mass pedunculated ...

Mobile masses within the left atrial cavity are commonly caused by organized thrombi or left atrial myxoma. The use of transesophageal echocardiography has provided means for differentiation between the 2 conditions. We report a case of a left atrial mass in a female ...

... Atrial fibrillation is the irregular beating of the right and left atria, the upper chambers of the heart. ... Atria Upper right and left chambers of the heart. ...

A 59-year-old woman with a left atrial myxoma was shown to have moderate aortic regurgitation. At operation for removal of the myxoma it was found to be attached to the atrial septum close to the aortic root. It is suggested that the aortic regurgitation was caused by distortion of the aortic root caused by traction upon it from the ...

... into the atrium. Treatment is necessary to avoid metastasis and the formation of clots. In addition, untreated ...

The purpose of this study was to describe a new technique for catheter ablation of the atrioventricular junction using radiofrequency energy delivered in the left ventricle. Catheter ablation of the atrioventricular (AV) junction using a catheter positioned across the tricuspid annulus was unsuccessful in eight patients with a mean {plus minus} SD age of 51 {plus minus} 19 ...

Magnetic resonance angiography (MRA) is a safe and non-invasive imaging method that can readily depict the pulmonary veins (PV), whose imaging has acquired momentum with the advent of new techniques for radiofrequency ablation of atrial fibrillation (AF). We evaluated whether virtual endoscopy from 3D MRA images (MRA-VE) is feasible in studying the morphology of PV. Fifty ...

OBJECTIVE: Postoperative atrial fibrillation complicating general thoracic surgery increases morbidity and stroke risk. We aimed to determine whether preoperative atrial dysfunction or other echocardiographic markers are associated with postoperative atrial fibrillation. METHODS: In 191 patients who had undergone anatomic lung or ...

Left atrial appendage inversion is a very rare cause of left atrial mass that usually occur after cardiac surgery. Its echocardiographic appearance often misleads clinicians to the diagnosis of thrombus or cardiac neoplasms. Unfortunately, misdiagnosed patients often undergo unnecessary anticoagulation or surgical ...

An inverted left atrial appendage which fails to revert spontaneously is a rare complication of cardiac surgery. We present a case of an inverted left atrial appendage discovered intraoperatively on transoesophageal echocardiography. This was readily identified and was easily corrected with digital manipulation. ...

A 24-year-old man was admitted to our hospital for surgical resection of mediastinal non-seminomatous germ cell tumor after 4 courses of BEP therapy (cisplatin, bleomycin, etoposide). Although it became markedly smaller after chemotherapy, the tumor invaded the superior vena cava (SVC) and the left brachiocephalic vein (LBCV). Venogram demonstrated SVC obstruction above the ...

Ventricular Diastolic Function in Atrial Fibrillation Dae-Won Sohn MD Jong-Min Song MD Joo-Hee Zo MD In diastolic function in patients with atrial fibrillation. Atrial fibrillation is the most common sustained is limited in atrial fibrillation because of the altered left ...

A case of left atrial rhabdomyosarcoma presenting in a patient with known mitral stenosis is described. Computed tomography of the left atrium, gated to the electrocardiogram cycle, was used to visualise the site and extension of the tumour.ImagesFig. 1Fig. 2

A large atrial myxoma, attached in an atypical location, was identified in the left atrium of a 70 year old patient. Although the tumour occupied a large part of the left atrium the patient remained in sinus rhythm and displayed no symptoms. PMID:15084572

A large atrial myxoma, attached in an atypical location, was identified in the left atrium of a 70 year old patient. Although the tumour occupied a large part of the left atrium the patient remained in sinus rhythm and displayed no symptoms.

Radiofrequency ablation procedures inside the left atrial appendage (LAA) are likely to involve dangerous complications because of a high thrombogenic effect. Cryoablation procedures are supposed to be safer. We describe two cases of successful cryoablation procedures. Two NavX-guided cryoablations of permanent focal atrial arrhythmias ...

... submitted by Atritech, Incorporated, for the WATCHMAN Left Atrial Appendage Closure. ... I'll start on my left with Dr. Zuckerman, please. DR. ...

... 91�92 scaled to smaller bar at left): aap, accessory apical projection; asp accessory subapical projection; dp, ... ...

The pathophysiological properties of the left atrium are not usually considered for stroke risk stratification of patients with atrial fibrillation. The demonstration that left atrial fibrosis detected by delayed-enhancement MRI is associated with history of stroke highlights the need to take into account ...

The discovery of a large left atrial mass obliges the clinician to perform a differential diagnosis including tumour versus thrombus, but because of morphology and mobility of the mass, always it is difficult to differentiate one from the other. We present the case of a large left atrial thrombus mimicking a large ...

Catheter ablation of left-sided atrioventricular accessory pathways through the coronary sinus by direct-current shock may be complicated by rupture and thrombosis of the coronary sinus and injury to the coronary arteries. This study examined short and long-term effects of radiofrequency catheter ablation of the coronary sinus in 20 closed-chest dogs to ...

Circulatory shock (effect of decreased cardiac output). 15. Mitral stenosis ( effect of increased left atrial pressure). 16. Atrial septal defect with normal ...

hemodynamic effects of milrinone and enalapril in conscious rats with healed myocardial infarction. Eur J

simultaneous atrial and ventricular driving and with atrial fibrillation ...... combined beta-adrenergic and vagal blockage on left ventricular ...

left atrial size and atrial fibrillation. A76-20071. CABDIAC VENTRICLES. Evaluation of vectorcardiographic criteria for the ...

Comparative coronary sinus flow rates and oxygen AV difference were studied in dogs undergoing left heart bypass with left atrial or left ventricular drainage at similar maximum obtainable flow rates. Left atrial bypass decreased the coronary sinus flow rates and oxygen ...

Electrophysiologic intracardiac and noninvasive transesophageal testing, used to evaluate parameters of anterograde conduction across the accessory pathway, the refractory period and shortest atrial cycle length with 1:1 conduction over the pathway, were compared to assess the reliability of the noninvasive technique in identifying patients with ...

We report a rare case of an inverted left atrial appendage without prior cardiac surgery. A left atrial mass was incidentally found during routine echocardiography in a 19-year-old man with mitral valve prolapse. Echocardiography revealed a hyperechoic mass in the left atrium, and a neoplastic ...

A 75 year old man with an eight month history of dysphagia and weight loss underwent pericardiocentesis for a massive pericardial effusion. The echocardiogram showed a mass in the left atrium, and computed tomography also showed distal oesophageal narrowing, which was found to be due to a malignant melanoma. The left atrial mass, ...

An unexpected left atrial mass was found during postoperative echocardiography in a 17-years old man following aortic valve replacement, suggesting thrombus, vegetation and neoplasm. Reoperation showed that the mass to be an inverted left atrial appendage. Left ventricular venting may cause ...

Here we describe an unusual case of giant cell myocarditis (GCM) found in the left atrial appendage. Giant cell myocarditis is a rare entity in itself, while isolated left atrial GCM has only been reported on a few occasions. We describe a patient who underwent mitral valve replacement for rheumatic mitral stenosis ...

OBJECTIVE: To report on the experience with radiofrequency catheter ablation of accessory atrioventricular pathways in patients with Wolff-Parkinson-White syndrome in terms of the duration of fluoroscopy exposure to the patient and the operator and the effect of accessory-pathway location and operator experience on the success rate. DESIGN: Retrospective ...

Thrombus formation in the left atrium is rare in patients in sinus rhythm. In three patients with extensive cardiac amyloidosis transthoracic echocardiography showed large atrial thrombi in or protruding into the body of the left atrium during sinus rhythm. Doppler studies showed no A wave on mitral inflow. Severe ...

We report the case of a left-sided migrated 'Sideris button' atrial septal defect occlusion device 6 years post-implantation with a residual secundum atrial septal defect and left atrial mass. The aims of this case report are to highlight an uncommonly seen atrial septal ...

Accessory fissures of the lung are commonly observed in lung specimens, but are often unappreciated or misinterpreted in radiographs and computer tomographic (CT) scans. They usually occur at the boundaries between bronchopulmonary segments. Most common are the inferior accessory fissure, which demarcates the medial basal segment; the superior ...

Faulty incorporation of the common pulmonary vein leaves it as a distinct structure posteriorly, into which the pulmonary veins empty. This �chamber� is separated from the anterior �fetal� left atrium (containing the left atrial appendage and communicating with the mitral valve) by a diaphragm, and is known as cor triatriatum, ...

Abstract? Atrial-esophageal fistula is a rare but often fatal complication of percutaneous radiofrequency ablation for atrial fibrillation. We present a patient who was diagnosed with this complication in a delayed fashion and successfully treated with primary repair via left thoracotomy. The details of the surgical approach are ...

the left atrium to the left ventricle during atrial contractions. Two subsequent episodes of atrial and energetic 52-year-old photographer suffers from atrial fibrillation, the world's most-common heart force behind a rapidly evolving method for treating atrial ...

We describe the case of a 37-year-old woman with atrial tachycardia associated to atrial septal aneurysm. We consider a localized reentry mechanism as the pathogenetic mechanism of the arrhythmia as demostrated by means of electrophisiological evaluation and electroanatomical mapping. The treatment by radiofrequency appears as an effective and well ...

Anatomically corrected malposition is characterized by abnormally related great vessels and atrioventricular and ventriculoarterial concordance. It is often associated with juxtaposition of the atrial appendages where the plane of the atrial septum is abnormally oriented. We describe the device closure of an atrial septal defect in a ...