BACKGROUND The use of antithrombotic therapy during the postoperative period after biological aortic valve replacement (AVR) in patients without thromboembolic risk factors remains controversial. Treatment with warfarin is recommended for the first 3 months after biological AVR. The use of antiplatelet therapy - mainly aspirin (ASA) - is suggested as an alternative treatment but its efficacy is...

AIM To determine whether concomitant surgery is a predictor of mortality in patients undergoing surgery for ascending aortic aneursym. METHODS Ninety-nine patients who underwent ascending aortic aneursym surgery between January 2010 and January 2015 were included in this study. Nineteen patients underwent ascending aortic replacement (RAA) only, 36 underwent aortic valve replacement (AVR) and...

The paper describes an optimal parameter selection method of automatic voltage regulator (AVR) for a large power plant in order to improve power system stability. The AVR is generally used to control the output voltage of the generator by regulating the excitation voltage in a generator rotor. In order to improve transient stability in power system, the paper proposes the method to select optim...

Clinically significant mitral regurgitation is often found in conjunction with severe aortic valve stenosis. Adding mitral valve surgery to an aortic valve replacement (AVR) increases the operative risk. However, this increased operative risk may be reduced if, during AVR, a standard double-valve surgery is avoided and AVR isperformed instead with a transaortic edge-to-edge repair of the mitral...

I n this issue of JACC: Cardiovascular Interventions, De Backer et al. (1) describe the evolving trends in aortic valve replacement (AVR), both surgical AVR (SAVR) and transcatheter AVR (TAVR), for aortic stenosis over the past decade. They report findings from a regional administrative registry database from eastern Denmark for the period from 2005 to 2015. We briefly discuss the implications ...

Method Between 2006 and 2014, 72 patients met criteria for inclusion. Out of these 72, 59 had previous CAB and 13 had CAB + AVR. The surgical procedures performed in these series included 50 AVR and 22 AVR + CAB. Myocardial protection was delivered using mild systemic hypothermia and continuous cold blood retrograde and intermittent antegrade cardioplegia, avoiding any manipulation of the LIMA ...

Lead aVR, 1 of 12 electrocardiographic leads, is frequently ignored in clinical medicine. In fact, many clinicians refer to the 12-lead electrocardiogram (ECG) as the 11-lead ECG, noting the commonly held belief that lead aVR rarely offers clinically useful information. In this report, we discuss the findings in lead aVR, which are potentially of value, including ST-segment elevation in the pat...

Background/Introduction Aortic valve replacement (AVR) is the current gold standard treatment for aortic stenosis. In the last 15 years popularity for minimally invasive (MI) AVR has grown exponentially. The most common techniques for MI-AVR are a partial sternotomy (PS) or a mini-thoracotomy (MT). Although MI access is technically more challenging and results in longer cross clamp and cardiopu...

Isolated ST-segment elevation only in the aVR lead, reflecting an acute myocardial infarction due to a left main coronary artery occlusion, was ignored as part of physicians' training in emergency medicine for a long time. The recognition of aVR lead elevation is becoming more accepted as a mandatory diagnostic tool, in particular for physicians working at emergency departments. We report a typ...

Plant pathogens display impressive versatility in adapting to host immune systems. Pathogen effector proteins facilitate disease but can become avirulence (Avr) factors when the host acquires discrete recognition capabilities that trigger immunity. The mechanisms that lead to changes to pathogen Avr factors that enable escape from host immunity are diverse, and include epigenetic switches that ...