• Hence, the ability to measure myocardial perfusion reserve allows a more comprehensive assessment of the entire coronary circulation, beyond the current paradigm of the epicardial arteries. (centerwatch.com)
  • In the introduction to this report it was pointed out that there are three important desiderata to the problem of improving the coronary circulation in the human heart. (rupress.org)
  • Late coronary sinus occlusion These risk were not reported in patients who receieved the device. (centerwatch.com)
  • Following coronary sinus obturation such secondary sudden occlusion of the left anterior descending branch is followed either by no infarction or by a reduction in the size of the infarct. (rupress.org)
  • On the other hand, sudden and complete coronary sinus obturation by itself is associated with a high operative mortality and apparently does not affect the mortality rate following subsequent sudden left anterior descending branch occlusion. (rupress.org)
  • Although no experiments employing sudden left anterior descending coronary branch occlusion were carried out sooner than 1 week, there is available anatomic evidence that within possibly 24 hours after coronary sinus occlusion a dilatation of the vascular bed occurs. (rupress.org)
  • A discussion is given of the results following various coronary sinus occlusion procedures in which it is indicated that it is desirable to produce a partial or gradual occlusion in order to lower the mortality rate both of the initial procedure as well as of the subsequent sudden arterial occlusion. (rupress.org)
  • Myocardial perfusion reserve depends not only on trans-stenotic pressure gradient of the epicardial arteries and thus stenosis severity but even more on the ability of the coronary microvasculature (especially the pre-arterioles) to dilate. (centerwatch.com)
  • Therefore, coronary microvascular dysfunction, which impairs pre-arteriolar function, reduces myocardial perfusion reserve independently of the presence of epicardial coronary stenosis. (centerwatch.com)
  • and RF energy is then applied to the coronary sinus tissue through the electrodes to cause activation mapping, and/or ablation. (google.com)
  • An alternative, simple CMR method for measurement of myocardial perfusion reserve by quantifying change in coronary sinus flow has been described. (centerwatch.com)
  • The investigators hypothesized that measurement of coronary sinus flow at stress and rest may provide a simple and rapid assessment of myocardial perfusion reserve during regadenoson stress perfusion CMR. (centerwatch.com)
  • This study will use phase contrast images obtained from patients during their clinically indicated CMR stress study to calculate myocardial perfusion reserve as the ratio of maximum myocardial blood flow to baseline blood flow - at the coronary sinus. (centerwatch.com)
  • The acute physiologic effects of the aorta to coronary sinus anastomosis of Beck have been studied. (ahajournals.org)
  • This paper describes a case of a 44-year-old male patient previously healthy admitted with an unusual spontaneous acute bacterial pericarditis associated with coronary sinus mass. (hindawi.com)
  • This is a rare condition and a unique combination of a spontaneous acute bacterial pericarditis with coronary sinus endocarditis without cardiac valve compromise. (hindawi.com)
  • The present paper describes the case of a previously healthy male patient suffering from spontaneous acute bacterial pericarditis caused by Oxacillin-sensitive Staphylococcus aureus and with a coronary sinus vegetative growth which was successfully treated by surgery and antibiotic therapy. (hindawi.com)
  • Thrombophlebitis of the coronary sinus and spontaneous bacterial pericarditis are even rarer though most commonly found in severely ill and immunosuppressed patients with poor clinical evolution [ 4 , 5 ]. (hindawi.com)
  • This level of care in the manufacturing process means consistent response and performance strength, even at smaller French sizes -- characteristics vital to efficient coronary sinus placement. (bio-medicine.org)
  • Numerous device have also been deployed in the coronary sinus as a means to structurally remodel the annulus of the mitral valve (e.g., to minimize valvular regurgitation). (umn.edu)
  • Two-dimensional echocardiography showed large loculated pericardial effusion with signs of diastolic restriction and an image suggesting vegetation in topography of the right atrium coronary sinus. (hindawi.com)
  • The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the heart muscle (myocardium). (wikipedia.org)
  • It returns blood from the heart muscle, and is protected by a semicircular fold of the lining membrane of the auricle, the valve of coronary sinus (or valve of Thebesius). (wikipedia.org)
  • Coronary sinus flow is calculated by integrating the momentary flow rate values from each cardiac phase over the entire cardiac cycle and multiplying by the mean heart rate during the acquisition. (centerwatch.com)
  • Since this vessel forms a partial crown like circle around the heart, it is aptly named "Coronary. (statpearls.com)
  • Electrocardiography (ECG) most commonly shows normal sinus rhythm in young patients, with an increasing occurrence of sinus-node dysfunction beginning in childhood and becoming more frequent with age. (medscape.com)
  • Partial persistent obturation of the coronary sinus, however, is in itself associated with a low operative mortality. (rupress.org)
  • It may prevent the regurgitation of blood into the sinus during the contraction of the atrium. (wikipedia.org)
  • The surgical treatment of an isolated coronary sinus ASD is complicated by its proximity to the atrioventricular node. (medscape.com)