Right atrial thrombi may develop within the right atrium or may have peripheral venous origins that, on their way to the final destination site lodge in, right atrium. Right atrial thrombosis is classified as two type: A (mobile, thin) and B (non mobile and attached to atrial wall) that they are probably of cardiac origin due to local pathology, indwelling catheter, atrial fibrillation, stasis,...

BACKGROUND The purpose of this study was to assess simultaneous right and left atrial pacing as prophylaxis for postoperative atrial fibrillation. METHODS AND RESULTS In a double-blind, randomized fashion, 118 patients who underwent open heart surgery were assigned to right atrial pacing at 45 bpm (RA-AAI; n=39), right atrial triggered pacing at a rate of >/=85 bpm (RA-AAT; n=38), or simultan...

normal healthy children.4 The association between the fall in atrial natriuretic peptide concentration and decrease in body weight after volume reduction by haemodialysis suggests that in children volume expansion releases atrial natriuretic peptide. In preterm infants plasma atrial natriuretic peptide concentrations are considerably raised on the second day of life and decrease to normal withi...

The sequence of right and left atrial contractions was analysed in 8 patients during spontaneous sinus rhythm and paced left atrial rhythm. During sinus rhythm, the beginning or peak of the right atrial a wave invariably preceded the beginning or peak of the left atrial a wave by a median of 32 and 34 msec, respectively. During paced left atrial rhythm, the beginning or peak of the right atrial...

Twenty-one patients with atrioventricular (AV) bypass tracts underwent electrophysiologic studies. The bypass tract was left-sided in 15 patients, septal in five and right-sided in one patient. Orthodromic AV-reciprocating tachycardia was induced in all 21 patients, with a mean tachycardia cycle length of 342 59 msec. The introduction of single stimuli in the high right atrium during tachycardi...

Central venous pressure (CVP) measurements have been used extensively in the management of critically ill patients. The value of CVP determinations was studied by determining the relationship of left atrial and right atrial pressares in 200 patients undergoing transsepta1 heart catheterization. All patients had mitral valve disease. The correlation coefficient of left atrial and right atrial pr...

Pheochromocytoma is a catecholamine-producing tumor and a rare cause of hypertension. Most cases are intra-adrenal and intrapericardial pheochromocytomas are extremely uncommon. We report the case of a 46-year-old woman with a 1-year history of hypertension, in which a right atrial pheochromocytoma was detected after a hypertensive crisis. 131I-metaiodobenzylguanidine scintigraphy and magnetic ...

right-sided heart thrombus is a life-threatening condition that necessitates immediate therapy. detection of right-sided heart thrombus is usually via transthoracic echocardiography. generally, thrombolysis is considered a treatment of choice, but there is currently no consensus about the optimal therapeutic choice. we present a case of multiple right atrial thrombi with concurrent mobile and b...

In seven patients thermodilution coronary sinus flow (TD-CSF) was higher (164 +/- 21 ml/min) during ventricular pacing than during atrial pacing (119 +/- 21 ml/min, P less than 0.005) at identical heart rate, without an increase in the determinants of myocardial oxygen consumption. To assess the possibility of right atrial admixture in coronary sinus blood during ventricular pacing we compared ...