The endothelium of the coronary vascular system has been described in the literature as originating from different sources, varying from aortic endothelium for the main coronary stems, endocardium for the intramyocardial network, and sinus venosus lining for the venous part of the coronary system. Using an antibody against quail endothelial cells (alpha-MB1), we investigated the development of ...

1. Dobbertin A, Warnes C, Seward J: Cor Triatriatum Dexter in an adult diagnosed by transesophageal echocardiography: A case report. J Am Soc Echocardiogr 1995; 8:952–7 2. Fiorilli R, Argento G, Tomasco B, Serino W: Cor Triatriatum Dexter diagnosed by transesophageal echocardiography. J Clin Ultrasound 1995;23:502–4 3. Valdes-Cruz LM, Cayre RO: Anomalies of the tricuspid valve and right atrium,...

Sinus venosus atrial septal defect is a rare congenital, interatrial communication defect at the junction of the right atrium and the vena cava. It accounts for 5-10% of cases of all atrial septal defects. Due to the rare prevalence and anatomical complexity, diagnosing sinus venous atrial septal defects poses clinical challenges which may delay diagnosis and treatment. Advanced cardiac imaging...

At many synapses, neurotransmitter receptor molecules in the postsynaptic membrane are selectively concentrated at a site directly opposite the presynaptic nerve terminal. In this paper, I examine acetylcholine (ACh) receptor distribution in cardiac muscle in relatin to the distribution of presynaptic axonal varicosities. The density of varicosities, stained with zinc iodide and osmium, ranges ...

abstractthe valves of right horn of systemic venous sinus are prominent structures within the right atrium during early embryonic period. involution of these structures may not be complete, resulting in a spectrum of anatomical presentations such as cyanosis. a full-term male neonate referred to our hospital for precise evaluation of severe cyanosis on the first day of life. echocardiographic e...

A 16-year-old male patient was referred to our institution due to occasional chest tightness for one month. Electrocardiogram showed some atrioventricular junctional beats. Transthoracic echocardiography revealed a hyperechoic mass about 1.4 × 0.5 cm in size in the right atrium. He was then scheduled for operation under the impression of possible right atrial myxoma. After general anesthesia, a...

Sinus venosus defects include two varieties, superior and inferior sinus defects. The defect is characterized by abnormal communication between closely related venoatrial structures: 1) the normally positioned vena cava-right atrium complex 2) right pulmonary vein-left that displaced leftward, forward upward. Inferior primarily involve atrial junction while can also be affected. Because of rari...

Abstract The study has aimed to investigate and determine the anatomical position, shape, size, histological features of ductus venosus, its role as a shunt in fetal circulatory system domestic ruminants. research was conducted on 19 bovine, 11 sheep 5 goat fetuses, aborted at late stage pregnancy or deceased just after delivery. general anatomy venosus investigated by in-situ dissection corros...