scholarly journals Morphology and Position of the Right Atrioventricular Valve in Relation to Right Atrial Structures

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 960
Author(s):  
Jakub Hołda ◽  
Katarzyna Słodowska ◽  
Karolina Malinowska ◽  
Marcin Strona ◽  
Małgorzata Mazur ◽  
...  
Keyword(s):  
Right Atrium ◽  
Variable Structure ◽  
Atrial Appendage ◽  
Right Atrial ◽  
Variable Component ◽  
Atrioventricular Valve ◽  
Stable Point ◽  
Complex Anatomy ◽  
Right Atrial Appendage ◽  
The Right

The right atrioventricular valve (RAV) is an important anatomical structure that prevents blood backflow from the right ventricle to the right atrium. The complex anatomy of the RAV has lowered the success rate of surgical and transcatheter procedures performed within the area. The aim of this study was to describe the morphology of the RAV and determine its spatial position in relation to selected structures of the right atrium. We examined 200 randomly selected human adult hearts. All leaflets and commissures were identified and measured. The position of the RAV was defined. Notably, 3-leaflet configurations were present in 67.0% of cases, whereas 4-leaflet configurations were present in 33.0%. Septal and mural leaflets were both significantly shorter and higher in 4-leaflet than in 3-leaflet RAVs. Significant domination of the muro-septal commissure in 3-leflet valves was noted. The supero-septal commissure was the most stable point within RAV circumference. In 3-leaflet valves, the muro-septal commissure was placed within the cavo-tricuspid isthmus area in 52.2% of cases, followed by the right atrial appendage vestibule region (20.9%). In 4-leaflet RAVs, the infero-septal commissure was located predominantly in the cavo-tricuspid isthmus area and infero-mural commissure was always located within the right atrial appendage vestibule region. The RAV is a highly variable structure. The supero-septal part of the RAV is the least variable component, whereas the infero-mural is the most variable. The number of detected RAV leaflets significantly influences the relative position of individual valve components in relation to right atrial structures.

scholarly journals Sensing and pacing with floating electrodes in the right atrium and right atrial appendage

1987 ◽  
Vol 9 (2) ◽  
pp. 308-315 ◽  
Author(s):  
André E. Aubert ◽  
Bruce N. Goldreyer ◽  
Milford G. Wyman ◽  
Hugo Ector ◽  
Bart G. Denys ◽  
...  
Keyword(s):  
Right Atrium ◽  
Atrial Appendage ◽  
Right Atrial ◽  
Right Atrial Appendage ◽  
The Right

scholarly journals Prominent Eustachian Valve Mimicking Thrombus in Right Atrium Diagnosed with Computed Tomography in a Patient with Atrial Fibrillation

2020 ◽  
pp. 1-2
Author(s):  
Ibrahim SARI ◽  
Gülsüm Bingöl ◽  
Ibrahim SARI ◽  
Muharrem Nasıfov ◽  
Özge Özden Tok ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Right Atrium ◽  
Left Atrial Appendage ◽  
Thrombus Formation ◽  
Correct Diagnosis ◽  
Atrial Appendage ◽  
Right Atrial ◽  
Eustachian Valve ◽  
Right Atrial Appendage ◽  
The Right

A 51-year-old man presented with paroxsysmal atrial fibrillation (AF). Transthoracic echocardiography revealed mass of 2.3x0.6 cm adjacent to the superior part of the right atrium (RA) compatible with thrombus. Although thrombus formation in the setting of AF is more common in left atrial appendage and left atrium it can also be seen in right atrial appendage and RA. We performed cardiac computerized tomography (CCT) in order to clarify the nature of mass in RA and exclude coronary stenosis. CCT showed prominent eustachian valve measuring 3.2 cm which was not clear on echocardiography. This case underscores the importance of complementary cardiovascular imaging to facilitate the correct diagnosis.

Evidence of nonuniform sympathetic neural activity to heart regions in guinea pigs

1979 ◽  
Vol 237 (5) ◽  
pp. H606-H611 ◽  
Author(s):  
P. G. Schmid ◽  
R. H. Dykstra ◽  
H. E. Mayer ◽  
R. P. Oda ◽  
J. J. Donnell
Keyword(s):  
Neural Activity ◽  
Right Atrium ◽  
Atrial Appendage ◽  
Right Atrial ◽  
Guinea Pig Heart ◽  
Sa Node ◽  
Norepinephrine Turnover ◽  
Cardiac Regulation ◽  
Right Atrial Appendage ◽  
The Right

Central neutral activity may selectively influence cardiac regions. As an index of this, rate constants of norepinephrine turnover, KNE, in regions of guinea pig heart were determined by 1) disappearance of [3H]NE from tissues, and 2) conversion of [3H]tyrosine to [3H]NE. In sinoatrial (SA) node and right atrial appendage, KNE averaged 0.084 +/- 0.014 and 0.066 +/- 0.004 (SE) h-1, respectively (P greater than 0.05). In other specialized regions, KNE was lower than in SA node (P less than 0.05). In other contractile regions, KNE was lower than in right atrial appendage (P less than 0.05). Ganglionic blockade reduced KNE to uniform values in all heart regions. Cold stress increased KNE markedly (P less than 0.05) throughout the heart, but selectively more in SA node, AV node, proximal conduction bundles, and right atrial appendage (P less than 0.05). At room temperature, neural activity is greater to the right atrium including SA node than to other cardiac regions. At 4 degrees C, neural activity increases selectively in the right atrium and the conduction system. This suggests that central neural mechanisms contribute significantly to nonuniform cardiac regulation under conditions of progressive sympathetic activation.

scholarly journals Transthoracic Right Atrial Cannulation for Total Parenteral Nutrition — Case Report

1981 ◽  
Vol 9 (1) ◽  
pp. 53-57 ◽  
Author(s):  
L. Hayden ◽  
G. Ramsey Stewart ◽  
D. C. Johnson ◽  
M. McD. Fisher
Keyword(s):  
Parenteral Nutrition ◽  
Total Parenteral Nutrition ◽  
Right Atrium ◽  
Venous Catheter ◽  
Right Atrial ◽  
X Ray ◽  
Right Thoracotomy ◽  
Right Atrial Appendage ◽  
The Right ◽  
Nutrition Programme

A man with severe peripheral vascular disease and requiring total parenteral nutrition because of short bowel syndrome was referred because a central venous catheter could not be inserted by conventional techniques. A right thoracotomy was performed and a Hickman catheter inserted via the right atrial appendage into the right atrium. This catheter was used for a total of seven months for total parenteral nutrition. For the last two months of this time, the patient was maintained at home on a Home Parenteral Nutrition Programme. After four months of total parenteral nutrition the patient developed recurrent fevers and the catheter was found to have migrated from the right atrium into the pulmonary artery. The catheter was resited under x-ray control and used for a further three months until the recurrence of fever and dyspnoea heralded the onset of septic pulmonary emboli resulting in his death.

scholarly journals A case of restrictive cardiomyopathy complicated by recurrent pulmonary thromboembolism originating at the right atrial appendage

2020 ◽  
Vol 21 (6) ◽  
pp. 220-223
Author(s):  
Hiroaki Yamamoto ◽  
Chieko Itamoto ◽  
Minato Hayashi ◽  
Tsunesuke Kohno ◽  
Yu Matsumura ◽  
...  
Keyword(s):  
Pulmonary Thromboembolism ◽  
Restrictive Cardiomyopathy ◽  
Atrial Appendage ◽  
Right Atrial ◽  
Right Atrial Appendage ◽  
The Right

Expression of Follistatin-Like 3 is not Altered in the Right Atrial Appendage in Patients with Myocardial Infarction

2018 ◽  
Vol 27 ◽  
pp. S317
Author(s):  
M. Morten ◽  
T. Senanayake ◽  
L. Butel-Simões ◽  
N. Mabotuwana ◽  
A. Boyle ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Atrial Appendage ◽  
Right Atrial ◽  
Right Atrial Appendage ◽  
The Right
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