A 67-year-old woman had progressive dyspnea, a loud murmur of mitral regurgitation, and a separate, continuous cardiac murmur suggesting shunt. Electrocardiographygated computed tomography demonstrated a 7-cm aneurysm of the left main coronary artery with possible connection to the right atrium (Figure, A), along with a thin tissue boundary between the aneurysm (Figure, B) and left atrium, rais...

The building atrium is a large space formed by integrating various functions. It runs through multiple floors and directly or indirectly connected with each floor. In the atrium, people can not only enjoy air quality of interior but also create an open natural environment characteristic outdoor space. this paper, winding corridor research object, using CFD simulation software to establish mathe...

During gestation period the oxygenated maternal blood is transferred to embryo via placenta and umbilical cord into right atrium. It further through an interatrial shunt left atrium, Foramen Ovale, distributed embryonic body. The foramen closed after birth, but remains occasionally patent, permitting embolization a shunt. This transferring thrombi, fat, cement bony spikes, air, malignant tissue...

OBJECTIVES Our purpose was to determine whether atrial fibrillation (AF) patients have alterations in sarcoplasmic reticulum (SR) Ca2+ regulatory proteins in the atrial myocardium. BACKGROUND Clinically, AF is the most frequently encountered arrhythmia. Recent studies indicate that an inability to maintain intracellular Ca2+ homeostasis with a consequent increase in membrane-triggered activit...

A 12-year-old spayed female miniature Poodle presented for coughing, respiratory distress, and anorexia. After thoracentesis for pleural effusion, radiography revealed an enlarged cardiac silhouette with a bulge in the area of the body of the right atrium. Echocardiography revealed an anechoic chamber-like cavity lateral to the right atrium that communicated with the right atrium through a 13 m...

Automatic segmentation of the heart's left atrium offers great benefits for planning and outcome evaluation of atrial ablation procedures. However, the high anatomical variability of the left atrium presents significant challenges for atlas-guided segmentation. In this paper, we demonstrate an automatic method for left atrium segmentation using weighted voting label fusion and a variant of the ...

INTRODUCTION AND OBJECTIVES The left atrium is clinically relevant in patients with mitral valve stenosis. The objective of this study was to analyze the effects of percutaneous balloon valvuloplasty on left atrium volumes and the left atrium emptying fraction in symptomatic mitral valve stenosis patients using 2-dimensional and real-time 3 -dimensional transthoracic echocardiography. METHODS...

INTRODUCTION AND OBJECTIVES Ectopic activity originating inside the pulmonary veins has been associated with paroxysmal atrial fibrillation in some patients. However, the roles played by the pulmonary veins and the posterior wall of the left atrium in maintaining atrial fibrillation are not well understood. METHODS Our aim was to determine whether there is a correlation between the refractory...

We compared effects of the antiarrhythmic drug bepridil on the electrophysiological parameters in the isolated pulmonary vein preparation from guinea pigs with those in the left atrium. Three pairs of bipolar electrodes were attached to the left atrium, pulmonary vein and junctional region of left atrium and pulmonary vein to measure intra-atrial and intra-pulmonary vein conduction velocity and...

Fig. 1. Transverse midesophageal plane at 458, demonstrating the short axis of the aortic valve in diastole. The ruptured aneurysm of the right coronary sinus protrudes into the right atrium just above the tricuspid valve producing the characteristic ‘windsock’ appearance described in textbooks. Colour-flow Successful surgical repair of a ruptured sinus of Valsalva aneurysm was performed in a 3...