Coronary compression caused by stenting a right pulmonary artery
... pain is also noteworthy. Because of its absence, we felt more secure that the left ventricular dysfunction was not due to acute coronary compression. The fact that the patient had an aortic transsection is thus very important because this led to cardiac denervation, which explains the absence of che ...
... pain is also noteworthy. Because of its absence, we felt more secure that the left ventricular dysfunction was not due to acute coronary compression. The fact that the patient had an aortic transsection is thus very important because this led to cardiac denervation, which explains the absence of che ...
The main pulmonary artery in adults: a controlled multicenter study
... and they have been reported in PH group 1 [29] including PH related to congenital heart disease [30], where patent ductus arteriosus is the most frequently reported underlying pathology of the MPA aneurysms [31,32], PH group 2, including acquired heart valve disease [20], and PH group 3 including ch ...
... and they have been reported in PH group 1 [29] including PH related to congenital heart disease [30], where patent ductus arteriosus is the most frequently reported underlying pathology of the MPA aneurysms [31,32], PH group 2, including acquired heart valve disease [20], and PH group 3 including ch ...
Mathematical modelling of cardiovascular fluid mechanics
... in order to correct the low frequency inconsistency of the threeelement Windkessel model, the great majority of successive works has been using Westerhof’s version. However, the blood motion in the cardiovascular system is mainly a phenomenon of wave propagation and reflection, and arteries are far ...
... in order to correct the low frequency inconsistency of the threeelement Windkessel model, the great majority of successive works has been using Westerhof’s version. However, the blood motion in the cardiovascular system is mainly a phenomenon of wave propagation and reflection, and arteries are far ...
Left Coronary Artery System – Angiographic Anatomy.
... Main left Coronary artery is best viewed in the standard 300 right anterior oblique view. It is one of the shortest amongst the most important vessels of the body. In this view it is directed frontally and to the left. While still in space between the aorta and pulmonary artery, it divides into two ...
... Main left Coronary artery is best viewed in the standard 300 right anterior oblique view. It is one of the shortest amongst the most important vessels of the body. In this view it is directed frontally and to the left. While still in space between the aorta and pulmonary artery, it divides into two ...
Energy metabolism in reperfused heart muscle: Metabolic
... malized with reperfusion. The pyruvate content did not change significantly with ischemia and reperfusion. Thus, glycogen was converted to lactate and alanine. The lack of accu• mulation of pyruvate with ischemia indicates quantitative conversion of pyruvate to lactate and alanine. Accumulation of l ...
... malized with reperfusion. The pyruvate content did not change significantly with ischemia and reperfusion. Thus, glycogen was converted to lactate and alanine. The lack of accu• mulation of pyruvate with ischemia indicates quantitative conversion of pyruvate to lactate and alanine. Accumulation of l ...
A Composite of Features for Learning
... two groups exchange the roles in training and testing, and the experiments are conducted again. The parameters that minimize the average mean square error are selected. In this work, I is set as 7.1. Given a voxel with polar coordinates of 9, :, ;, its global structure feature is predicted using ...
... two groups exchange the roles in training and testing, and the experiments are conducted again. The parameters that minimize the average mean square error are selected. In this work, I is set as 7.1. Given a voxel with polar coordinates of 9, :, ;, its global structure feature is predicted using ...
Uncommon Conal Pathology in Complete Dextrotransposition of the
... divides the primitive conus cordis in the definitive aortic and pulmonary outflow tracts. When viewed from the subaortic outflow tract in cases of complete dextrotransposition of the great arteries. the conal septum lies beneath the right and left coronary leaflets of the aortic valve. For descripti ...
... divides the primitive conus cordis in the definitive aortic and pulmonary outflow tracts. When viewed from the subaortic outflow tract in cases of complete dextrotransposition of the great arteries. the conal septum lies beneath the right and left coronary leaflets of the aortic valve. For descripti ...
Using the Surface Electrocardiogram to Localize the Origin of
... generated from a distant site of origin followed by spread of activation away from the focus. Some general principles related to ventricular geometry and activation governs the ECG patterns seen in VT. First, left ventricular free wall VT shows a right bundle branch block (RBBB) configuration, while ...
... generated from a distant site of origin followed by spread of activation away from the focus. Some general principles related to ventricular geometry and activation governs the ECG patterns seen in VT. First, left ventricular free wall VT shows a right bundle branch block (RBBB) configuration, while ...
Point of View Maladies Attributed to Myxomatous Mitral
... friction on the endocardium by the thickened chordae.15 Evidence for this friction is the presence of fibrous endocardial lesions, which when confluent and calcified may be detectable by angiography and echocardiography.37,38 Alternatively, there is experimental evidence that traction on the papilla ...
... friction on the endocardium by the thickened chordae.15 Evidence for this friction is the presence of fibrous endocardial lesions, which when confluent and calcified may be detectable by angiography and echocardiography.37,38 Alternatively, there is experimental evidence that traction on the papilla ...
Transoesophageal Echocardiography and Left Ventricular Function
... high-resolution images of cardiac structure throughout the cardiac cycle and, using Doppler techniques, allows evaluation of heamodynamics. Direct imaging of the left ventricle makes it an excellent tool for the assessment of ventricular wall thickness, chamber size and contractile performance. Tran ...
... high-resolution images of cardiac structure throughout the cardiac cycle and, using Doppler techniques, allows evaluation of heamodynamics. Direct imaging of the left ventricle makes it an excellent tool for the assessment of ventricular wall thickness, chamber size and contractile performance. Tran ...
Flow-Induced Platelet Activation in Mechanical Heart Valves
... rates have been reduced by developing new valve designs, the incidence of thromboembolic complications (2-4) remains relatively high (1.5 to 3 per 100 patient-years). Valve thrombogenicity is related to both hemodynamic design directed at mitigating the non-physiological flow characteristics and the ...
... rates have been reduced by developing new valve designs, the incidence of thromboembolic complications (2-4) remains relatively high (1.5 to 3 per 100 patient-years). Valve thrombogenicity is related to both hemodynamic design directed at mitigating the non-physiological flow characteristics and the ...
pulmonary hypertension and a continuous murmur due to
... the diagnosis was made at thoracotomy and in the others by cardiac catheterization. Three patients had coexisting pulmonary valvular stenosis. The fourth patient had an accentuated pulmonary second sound as would be expected with a postvalvular stenosis. One patient had Fallot's tetralogy, one had a ...
... the diagnosis was made at thoracotomy and in the others by cardiac catheterization. Three patients had coexisting pulmonary valvular stenosis. The fourth patient had an accentuated pulmonary second sound as would be expected with a postvalvular stenosis. One patient had Fallot's tetralogy, one had a ...
Guidelines and Standards for Performance of a Pediatric
... Clinical Competency and Training Statement on Pediatric Cardiology (Task Force 2: Pediatric Training Guidelines for Noninvasive Cardiac Imaging) represent the most recent guidelines and, with minor modifications, are incorporated in this document.25 Levels of expertise. Physicians who practice TTE m ...
... Clinical Competency and Training Statement on Pediatric Cardiology (Task Force 2: Pediatric Training Guidelines for Noninvasive Cardiac Imaging) represent the most recent guidelines and, with minor modifications, are incorporated in this document.25 Levels of expertise. Physicians who practice TTE m ...
Guidelines and Standards for Performance of a Pediatric
... Clinical Competency and Training Statement on Pediatric Cardiology (Task Force 2: Pediatric Training Guidelines for Noninvasive Cardiac Imaging) represent the most recent guidelines and, with minor modifications, are incorporated in this document.25 Levels of expertise. Physicians who practice TTE m ...
... Clinical Competency and Training Statement on Pediatric Cardiology (Task Force 2: Pediatric Training Guidelines for Noninvasive Cardiac Imaging) represent the most recent guidelines and, with minor modifications, are incorporated in this document.25 Levels of expertise. Physicians who practice TTE m ...
Abridged version of the expert consensus document on arterial
... frequent. All types of classical, bi-dimensional vascular ultrasound systems can be used to determining diameter at diastole and stroke changes in diameter, but most of them are limited in the precision of measurements because they generally use a video-image analysis. At present some researchers al ...
... frequent. All types of classical, bi-dimensional vascular ultrasound systems can be used to determining diameter at diastole and stroke changes in diameter, but most of them are limited in the precision of measurements because they generally use a video-image analysis. At present some researchers al ...
Chordal rupture - Heart
... posterior cusp whereas in the replacement group the predominant lesion was anterior chordal rupture (57/O). In the early part of the series one of us (MP) electively treated all cases of ruptured chordae by mitral valve repair if technically feasible. It became clear during the series that the leafl ...
... posterior cusp whereas in the replacement group the predominant lesion was anterior chordal rupture (57/O). In the early part of the series one of us (MP) electively treated all cases of ruptured chordae by mitral valve repair if technically feasible. It became clear during the series that the leafl ...
counterpulsation applied
... The variables that increase oxygen demand are preload, afterload, heart rate and contractility. The inflation of the IAB increases diastolic pressure to increase coronary perfusion and potentially open collateral vessels, thereby increasing oxygen supply to the ischemic heart muscle. Deflation of th ...
... The variables that increase oxygen demand are preload, afterload, heart rate and contractility. The inflation of the IAB increases diastolic pressure to increase coronary perfusion and potentially open collateral vessels, thereby increasing oxygen supply to the ischemic heart muscle. Deflation of th ...
Mitral Valve Regurgitation: Surgical Treatment
... Congenital insufficiency of the mitral valve is also an indication for surgical reconstruction. Patients with multivalvular disease, severe rheumatic disease, severe thickening and calcification of the leaflets or of the annulus, should undergo replacement rather than reconstruction. Replacement sho ...
... Congenital insufficiency of the mitral valve is also an indication for surgical reconstruction. Patients with multivalvular disease, severe rheumatic disease, severe thickening and calcification of the leaflets or of the annulus, should undergo replacement rather than reconstruction. Replacement sho ...
Variations in the Number and Morphology of Cusps of the Tricuspid
... largest component of the valve as reported by shwarek et al [5]. In a cadaveric study Skwarek et al found that average length of anterior cusp was 31.98±8.74mm [6]. In another study Motabagani et al mention average length of anterior cusp 3.9-4.7cm in male and 2.7-3.5cm in female [15]. In this study ...
... largest component of the valve as reported by shwarek et al [5]. In a cadaveric study Skwarek et al found that average length of anterior cusp was 31.98±8.74mm [6]. In another study Motabagani et al mention average length of anterior cusp 3.9-4.7cm in male and 2.7-3.5cm in female [15]. In this study ...
Counterpulsation applied
... heart rate. Increased heart rate allows less time for filling of the coronary arteries during diastole. It is important to distinguish between oxygen demand, oxygen supply and oxygen consumption. The consumption cannot increase to meet demand if usable supply of oxygen is insufficient (cardiac arres ...
... heart rate. Increased heart rate allows less time for filling of the coronary arteries during diastole. It is important to distinguish between oxygen demand, oxygen supply and oxygen consumption. The consumption cannot increase to meet demand if usable supply of oxygen is insufficient (cardiac arres ...
Institutional and national trends in isolated mitral valve surgery over
... led to significant changes in the surgical strategies applied as well as better results following mitral valve surgery [1,2,3]. These improvements are largely due to the higher percentage of patients having mitral valve repair rather than replacement. Recent work has demonstrated that, when comp ...
... led to significant changes in the surgical strategies applied as well as better results following mitral valve surgery [1,2,3]. These improvements are largely due to the higher percentage of patients having mitral valve repair rather than replacement. Recent work has demonstrated that, when comp ...
Sinus of Valsalva Aneurysm with Rupturing into the Right Atrium ¾ A
... sinus, usually over many years. Therefore, sinus of Valsalva aneurysm can remain subclinical for several years until it eventually ruptures between the 3rd and 4th decades of life. The commonest sites of aneurysm ruptures are cardiac chambers, interventricular septum,8 or pericardial space.9 Dilated ...
... sinus, usually over many years. Therefore, sinus of Valsalva aneurysm can remain subclinical for several years until it eventually ruptures between the 3rd and 4th decades of life. The commonest sites of aneurysm ruptures are cardiac chambers, interventricular septum,8 or pericardial space.9 Dilated ...
Antithrombotic Therapy in Valvular Heart Disease—Native and
... stroke in patients with nonvalvular AF. An additional Canadian multicenter trial29 was terminated prematurely when its results developed a trend consistent with the data reported in the four earlier trials. More recently, a meta-analysis that included six published, randomized trials with a total of ...
... stroke in patients with nonvalvular AF. An additional Canadian multicenter trial29 was terminated prematurely when its results developed a trend consistent with the data reported in the four earlier trials. More recently, a meta-analysis that included six published, randomized trials with a total of ...
Department of Cardiothoracic Surgery Adult and Congenital Cardiac
... Total Anomalous Pulmonary Venous Connection Trans-catheter Aortic Valve Implantation ...
... Total Anomalous Pulmonary Venous Connection Trans-catheter Aortic Valve Implantation ...
IntraAortic Balloon Pump (IABP): Indication For and Beyond
... medical therapy, especially STEMI y IABP also indicated in other causes of CS, although with less clear data: y Critical aortic stenosis y Severe decompensated MR y Progressive right and/or left heart failure despite medical therapy (bridge to other treatment) ...
... medical therapy, especially STEMI y IABP also indicated in other causes of CS, although with less clear data: y Critical aortic stenosis y Severe decompensated MR y Progressive right and/or left heart failure despite medical therapy (bridge to other treatment) ...
Aortic stenosis
Aortic stenosis (AS) is the narrowing of the exit of the left ventricle of the heart such that problems result. It may occur at the aortic valve as well as above and below this level. It typically gets worse over time. Symptoms often come on gradually with a decreased ability to exercise often occurring first. If heart failure, loss of consciousness, or heart related chest pain occurs due to AS the outcomes are worse. Loss of consciousness typically occurs with standing or exercise. Signs of heart failure include shortness of breath especially with lying down, at night, and with exercise as well as swelling of the legs. Thickening of the valve without narrowing is known as aortic sclerosis.Causes include being born with a bicuspid aortic valve and rheumatic fever. A bicuspid aortic valve affects about one to two percent of the population while rheumatic heart disease mostly occurring in the developing world. A normal valve, however, may also harden over the decades. Risk factors are similar to those of coronary artery disease and include smoking, high blood pressure, high cholesterol, diabetes, and being male. The aortic valve usually has three leaflets and is located between the left ventricle of the heart and the aorta. AS typically results in a heart murmur. Its severity can be divided into mild, moderate, severe, and very severe based on ultrasound of the heart findings.Aortic stenosis is typically followed using repeated ultrasounds. Once it has become severe treatment primarily involves valve replacement surgery with transcatheter aortic valve replacement (TAVR) being an option in some who are at high risk from surgery. Valves may either be mechanical or bioprosthetic with each having risks and benefits. Another less invasive procedure, balloon aortic valvuloplasty (BAV) may result in benefit but this is for only for a few months. Complications like heart failure may be treated as per normal in those with mild to moderate AS. In those with severe disease a number of medications should be avoided including ACE inhibitors, nitroglycerin, and some beta blockers. Nitroprusside or phenylephrine may be used in those with decompensated heart failure depending on the blood pressure.Aortic stenosis is the most common valvular heart disease in the developed world. It affects about 2% of people who are over 65 years of age. Estimated rates are not known in most of the developing world as of 2014. In those who have symptoms, without repair, the chance of death at five years is about 50% and at 10 years is about 90%. Aortic stenosis was first described by French physician Lazare Rivière in 1663.