An improved method for chronic His bundle recordings in conscious dogs

1984 ◽  
Vol 246 (6) ◽  
pp. H876-H879
Author(s):  
J. B. Schwartz ◽  
J. M. Herre ◽  
R. M. Lewis
Keyword(s):  
Animal Model ◽  
Stainless Steel ◽  
Coronary Artery ◽  
Aortic Root ◽  
Physiological State ◽  
Electrode Placement ◽  
Improved Method ◽  
Electrophysiological Studies ◽  
The Right ◽  
Steel Electrodes

Because anesthetics routinely used in cardiovascular experiments significantly alter the physiological state and electrophysiological function of the heart, our goal was to develop a surgically simple, inexpensive, and reliable animal model for chronic conscious electrophysiological studies. Our method differs from prior methods by implantation of bipolar stainless steel electrodes with pin length varied to adapt for the varied thickness of different cardiac chambers, electrode placement at the junction between the right atrium and aortic root posterior to the right coronary artery for recording the His potential, and unipolar His recordings.

scholarly journals Aortic Valve Endocarditis with Anomalous Origin of the Right Coronary Artery and Unknown Infected Thrombus in the Dissected Descending Thoracic Aorta

Aorta ◽  
2020 ◽  
Vol 08 (03) ◽  
pp. 076-079
Author(s):  
Juan Caceres ◽  
Vikram Sood ◽  
Linda Farhat ◽  
Bo Yang
Keyword(s):  
Coronary Artery ◽  
Right Coronary Artery ◽  
Aortic Root ◽  
Recurrent Infection ◽  
Young Male ◽  
Descending Thoracic Aorta ◽  
Native Valve ◽  
Aggressive Approach ◽  
Aortic Thrombus ◽  
The Right

AbstractWe report an intricate aortic root replacement in a young male patient suffering from native valve infective endocarditis due to Serratia marcescens. Further complicating the total root replacement, there was an unknown infected aortic thrombus and a concomitant anomalous right coronary artery with an intramural course. As a result of our more aggressive approach, we believe that we lowered the risk of recurrent infection of the bioprosthesis of the aortic root.

scholarly journals Emergency treatment of thrombus in right coronary artery and aortic root in a newborn with acute myocardial infarction

2021 ◽  
Vol 29 (3) ◽  
pp. 395-398
Author(s):  
Hatice Dilek Özcanoğlu ◽  
İsa Özyılmaz
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Coronary Artery ◽  
Right Coronary Artery ◽  
Aortic Root ◽  
Neonatal Period ◽  
Artery Thrombosis ◽  
Coronary Artery Thrombosis ◽  
Surgical Thrombectomy ◽  
The Right

Perinatal myocardial infarction caused by aortic root and coronary artery thrombosis in neonatal period is extremely rare and has a gloomy prognosis that may cause devastating complications. A 3-h newborn baby who had acute myocardial infarction findings on postnatal electrocardiography had a thrombus in the aortic root with hyperechogenic right coronary artery region, and impaired right ventricular functions on echocardiography. The patient was urgently operated and thrombus was successfully removed from the aortic root and the right coronary artery. In conclusion, for large thrombi posing a risk for embolization in the aortic root, an urgent surgical thrombectomy procedure should be performed.

scholarly journals Giant true aneurysm of the right coronary artery button long after aortic root replacement

2013 ◽  
Vol 43 (5) ◽  
pp. e139-e140 ◽  
Author(s):  
Giuseppe Bruschi ◽  
Aldo Cannata ◽  
Luca Botta ◽  
Luigi Martinelli
Keyword(s):  
Coronary Artery ◽  
Right Coronary Artery ◽  
Aortic Root ◽  
Aortic Root Replacement ◽  
True Aneurysm ◽  
The Right

Detecting soil microbial activity via an electrochemical activity sensor

2014 ◽  
Vol 63 (1) ◽  
pp. 175-179
Author(s):  
O. Bánszegi ◽  
E. Bognár ◽  
Cs. Gedeon ◽  
M. Dombos
Keyword(s):  
Stainless Steel ◽  
Electrical Potential ◽  
Soil Microbial Activity ◽  
Electrochemical Technique ◽  
Improved Method ◽  
Quality Research ◽  
Soil Microbial ◽  
Copper Zinc ◽  
Native Soils ◽  
Steel Electrodes

In water quality research the interest in online biofilm monitoring techniques has recently increased significantly.Christianiet al. (2008) presented a simple electrochemical technique to monitor electro-active biofilm in soil, based on the cathodic polarisation of stainless steel electrodes. Authors present an improved method, in which stainless steel was replaced by copper. By using copper-zinc electrodes authors have shown difference in the electrical potential between sterilized and native soils even at low moisture content.

scholarly journals P692 Curious Bentall procedure complications, not always found in the immediate postoperative period

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
S Blasco Turrion ◽  
P Gonzalez Perez ◽  
J A Sanchez Brotons ◽  
A Gomez Lopez ◽  
F J Morales Ponce
Keyword(s):  
Coronary Artery ◽  
Postoperative Period ◽  
Aortic Root ◽  
Ascending Aorta ◽  
Diagnostic Process ◽  
Prior History ◽  
Bentall Procedure ◽  
Aggressive Surgical Approach ◽  
Acute Dissection ◽  
The Right

Abstract Ascending aorta aneurisms are often diagnosed in patients around 60-70 years old with prior history of hypertension or smoking, or in younger patients with connective tissue illnesses, such as Marfan Syndrome (MS), or bicuspide aortic valve (BAV). In patients with MS an aneurysm of the aortic root, ascending aorta or acute dissection are the most frequent reasons of death, that is why an aggressive surgical approach is recommended, by repairing or replacing the diseased aortic root. Prophylactic aortic root surgery is an effective procedure in preventing acute dissection and rupture with excellent long-term outcomes as published in the literature, being the Bentall procedure usually the treatment of choice. However, the implantation of a mechanic aortic prosthesis makes permanent oral anticoagulation necessary with elevated haemorragic risk. We present two peculiar cases of Bentall procedure with differentes indications, different scenarios but similar outcomes. - Case A: A 75-year-old female with MS who underwent Bentall surgery in 1988 due to a severe AR, stable and asymptomatic since then. In a routine check-up in November 2017, a dilatation of 65mm in her native ascending aorta was detected on a computed tomography scan (CT), visualizing a half-moon shaped space between the ascending aorta and the aortic tube of 21x46mm and a leak from de aorto-ostial union, being possible to confirm with the TEE its origin in the left coronary ostium, which was also dilated (10mm), due to a dehiscence in the aortic tube suture on that level. - Case B: A 43-year-old male who underwent Bentall surgery in 2014 due to a severe AR and aortic root aneurysm that in January 2017 was admitted to our hospital due to chest pain with no other symptoms associated. As part of the study and TTE, TEE and CT were performed in which a periaortic haematoma from de aortic root to the beginning of the aortic arch was found, visualizing a leak from a 5mm hole in the ostium of the right coronary artery. In addition, the left coronary artery had a severe stenosis (85%) due to the compression of the haematoma on that level. Even though the Bentall procedure has excellent outcomes we discovered unusual either long and short-term complications due to dehiscence of the sutures, causing a huge peri-prosthetic tube haematoma, compressing the left main coronary artery in one of our patients which was the cause of the angina he presented with. We think these images could help the diagnostic process in future cases since these complications are not only found in the immediate postoperative period and should always be in our minds. Abstract P692 Figure.

scholarly journals A Case of Partial Aortic Root Remodeling for the Right Sinus of Valsalva Aneurysm with an Anomalous Origin of the Coronary Artery

2012 ◽  
Vol 41 (2) ◽  
pp. 70-75
Author(s):  
Takayuki Ueno ◽  
Kazuhisa Matsumoto ◽  
Kosuke Mukaihara ◽  
Kenji Toyokawa ◽  
Tomoyuki Matsuba ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Aortic Root ◽  
Anomalous Origin ◽  
Sinus Of Valsalva ◽  
Sinus Of Valsalva Aneurysm ◽  
Aortic Root Remodeling ◽  
The Right
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