Coronary structure and perfusion in health and disease
... affecting cardiac function. In this regard, it is rather important to understand the relationship between the organization of these compartments and the anatomy of the heart muscle. It is well known that infarction in one part of the heart is less disruptive to cardiac function than in other parts a ...
... affecting cardiac function. In this regard, it is rather important to understand the relationship between the organization of these compartments and the anatomy of the heart muscle. It is well known that infarction in one part of the heart is less disruptive to cardiac function than in other parts a ...
Relation of Effective Arterial Elastance (Ea) to Arterial - AJP
... Aortic blood pressure is computed using a previously validated heart–arterial interaction model (23, 24, 28)(Figure 1). Left ventricular (LV) function is described by a time-varying elastance model (30), and is coupled to a 4-element lumped parameter windkessel model representing the systemic arteri ...
... Aortic blood pressure is computed using a previously validated heart–arterial interaction model (23, 24, 28)(Figure 1). Left ventricular (LV) function is described by a time-varying elastance model (30), and is coupled to a 4-element lumped parameter windkessel model representing the systemic arteri ...
Anastomoses Between Bronchial and Coronary Circulation in a
... blocks, and in the right coronary artery in one case. This demonstrates the existence of a blood supply to the coronary arteries through the bronchial system. On the other hand, DSA depicted more information about the bronchial-coronary anastomotic route. The size of the bronchial and coronary arter ...
... blocks, and in the right coronary artery in one case. This demonstrates the existence of a blood supply to the coronary arteries through the bronchial system. On the other hand, DSA depicted more information about the bronchial-coronary anastomotic route. The size of the bronchial and coronary arter ...
EAE/ASE recommendations for image acquisition and display using
... Doppler imaging was first introduced using a matrix array transducer, it could only be displayed using a full volume, gated reconstruction technique. This required the incorporation/‘‘stitching‘‘ of 7-14 individual pyramidal volume slabs gated to the ECG, to create a 3D composite volume, in the uppe ...
... Doppler imaging was first introduced using a matrix array transducer, it could only be displayed using a full volume, gated reconstruction technique. This required the incorporation/‘‘stitching‘‘ of 7-14 individual pyramidal volume slabs gated to the ECG, to create a 3D composite volume, in the uppe ...
EAE/ASE Recommendations for Image Acquisition and Display
... Doppler imaging was first introduced using a matrix array transducer, it could only be displayed using a full volume, gated reconstruction technique. This required the incorporation/‘‘stitching‘‘ of 7-14 individual pyramidal volume slabs gated to the ECG, to create a 3D composite volume, in the uppe ...
... Doppler imaging was first introduced using a matrix array transducer, it could only be displayed using a full volume, gated reconstruction technique. This required the incorporation/‘‘stitching‘‘ of 7-14 individual pyramidal volume slabs gated to the ECG, to create a 3D composite volume, in the uppe ...
Study of Third Coronary Artery in Adult Human Cadaveric Hearts
... describing this coronary artery like supernumerary right coronary artery, infundibular artery, right Vieussens artery, Arteria accessoria, or adipose artery [2-4]. The TCA often anastomoses with the branch of the left anterior descending branch (LADA) and forms Vieussens’ arterial ring. This ring re ...
... describing this coronary artery like supernumerary right coronary artery, infundibular artery, right Vieussens artery, Arteria accessoria, or adipose artery [2-4]. The TCA often anastomoses with the branch of the left anterior descending branch (LADA) and forms Vieussens’ arterial ring. This ring re ...
Valvular And Structural Heart Disease
... accept a substantial bleeding risk to prevent stroke.2 1.0 Rheumatic Mitral Valve Disease Partly due to the introduction of antibiotics, rheumatic mitral valve disease has become rare in people raised in developed nations. Most of the cases in the United States and other developed nations are now fo ...
... accept a substantial bleeding risk to prevent stroke.2 1.0 Rheumatic Mitral Valve Disease Partly due to the introduction of antibiotics, rheumatic mitral valve disease has become rare in people raised in developed nations. Most of the cases in the United States and other developed nations are now fo ...
* Valvular and Structural Heart Disease
... accept a substantial bleeding risk to prevent stroke.2 1.0 Rheumatic Mitral Valve Disease Partly due to the introduction of antibiotics, rheumatic mitral valve disease has become rare in people raised in developed nations. Most of the cases in the United States and other developed nations are now fo ...
... accept a substantial bleeding risk to prevent stroke.2 1.0 Rheumatic Mitral Valve Disease Partly due to the introduction of antibiotics, rheumatic mitral valve disease has become rare in people raised in developed nations. Most of the cases in the United States and other developed nations are now fo ...
Repaired tetralogy of Fallot: the roles of cardiovascular magnetic
... 3) Reduced but reversible myocardial contractility. Over the short term, the impaired contractility may be reversible, and elimination of the volume load can result in recovery of pump function. 4) Irreversible myocardial injury associated with fibrosis and increased interstitial collagen [28]. Alth ...
... 3) Reduced but reversible myocardial contractility. Over the short term, the impaired contractility may be reversible, and elimination of the volume load can result in recovery of pump function. 4) Irreversible myocardial injury associated with fibrosis and increased interstitial collagen [28]. Alth ...
Echocardiographic Assessment of Cardiac Anatomy
... study of hypertensive subjects. The results of these studies have suggested that increases in left atrial dimension' and left ventricular wall thickness'"3 and decreases in closing velocity (E-F slope) of the anterior leaflet of the mitral valve3 occur frequently even in the absence of other signs o ...
... study of hypertensive subjects. The results of these studies have suggested that increases in left atrial dimension' and left ventricular wall thickness'"3 and decreases in closing velocity (E-F slope) of the anterior leaflet of the mitral valve3 occur frequently even in the absence of other signs o ...
Arterial pulsatility and aortic valve function under continuous flow left
... result of several different disease processes that may be subject to a variety of therapies. In a failing heart, there is a poor contractile performance with systolic impairment and delayed diastolic relaxation. Dilated cardiomyopathy is a disease of the cardiac muscle and is characterized by a dila ...
... result of several different disease processes that may be subject to a variety of therapies. In a failing heart, there is a poor contractile performance with systolic impairment and delayed diastolic relaxation. Dilated cardiomyopathy is a disease of the cardiac muscle and is characterized by a dila ...
Echocardiography in Pediatric and Congenital Heart
... cardiac output. In ischemic heart disease and cardiomyopathy, decreased cardiac pump function limits cardiac output. After the Fontan procedure the pulmonary circulation limits the preload reserve to the FSV and determines the cardiac output response [8,17]. This is comparable to obstructed inflow a ...
... cardiac output. In ischemic heart disease and cardiomyopathy, decreased cardiac pump function limits cardiac output. After the Fontan procedure the pulmonary circulation limits the preload reserve to the FSV and determines the cardiac output response [8,17]. This is comparable to obstructed inflow a ...
Myocardial hypertrophy and its role in heart failure with preserved
... impaired longitudinal strain in HFpEF patients was not correlated to other markers of diastolic dysfunction, but associated with N-terminal prohormones of brain natriuretic peptide, which was interpreted as a sign of systolic dysfunction, despite preserved EF (60). However, others found a reduction ...
... impaired longitudinal strain in HFpEF patients was not correlated to other markers of diastolic dysfunction, but associated with N-terminal prohormones of brain natriuretic peptide, which was interpreted as a sign of systolic dysfunction, despite preserved EF (60). However, others found a reduction ...
Mitral Annulus Calcification
... Mitral annulus calcification (MAC) is a chronic, degenerative process in the fibrous base of the mitral valve. Although MAC was initially thought to be an age-related degenerative process, there is accumulating evidence that other mechanisms, such as atherosclerosis and abnormal calcium-phosphorus met ...
... Mitral annulus calcification (MAC) is a chronic, degenerative process in the fibrous base of the mitral valve. Although MAC was initially thought to be an age-related degenerative process, there is accumulating evidence that other mechanisms, such as atherosclerosis and abnormal calcium-phosphorus met ...
Shi-Joon Yoo, Omar Thabit, Hyun Woo Goo, Whal Lee, Deane Yim
... marked elongation of the head and neck branches of the aortic arch. Most importantly, the trachea and left main bronchus was elongated and compressed by the low lying aortic and ductal arches and the left pulmonary artery. Erek et al subsequently reported three cases showing almost identical morphol ...
... marked elongation of the head and neck branches of the aortic arch. Most importantly, the trachea and left main bronchus was elongated and compressed by the low lying aortic and ductal arches and the left pulmonary artery. Erek et al subsequently reported three cases showing almost identical morphol ...
Syncope
... Patients with recurrent unexplained syncope without structural heart disease and a negative tilt test Class III: Not indicated Patients with known cause of syncope in whom treatment will not be guided by EP testing ...
... Patients with recurrent unexplained syncope without structural heart disease and a negative tilt test Class III: Not indicated Patients with known cause of syncope in whom treatment will not be guided by EP testing ...
DISSERTATION INFLUENCE OF ANATOMIC VALVE CONDITIONS
... stresses and strains, especially on the aortic side of the valve leaflets. These mechanical cues can be tied to valvular hemodynamics, however the factors regulating these hemodynamics are relatively unknown. Therefore, the overarching hypothesis of this research is that aortic valve sinus hemodynam ...
... stresses and strains, especially on the aortic side of the valve leaflets. These mechanical cues can be tied to valvular hemodynamics, however the factors regulating these hemodynamics are relatively unknown. Therefore, the overarching hypothesis of this research is that aortic valve sinus hemodynam ...
THE UTILITY OF PULSE PRESSURE MEASURED BY RADIAL
... this must be considered when we compare the two measures. PPb is associated with increased left ventricular mass18. This may be due to the fact that higher pulse pressures in the proximal arterial tree places increased workload on the heart. The heart muscle hypertrophies to compensate for this incr ...
... this must be considered when we compare the two measures. PPb is associated with increased left ventricular mass18. This may be due to the fact that higher pulse pressures in the proximal arterial tree places increased workload on the heart. The heart muscle hypertrophies to compensate for this incr ...
In utero pulmonary artery and aortic growth and potential for
... in tetralogy of Fallot can be attributed to variable patterns of growth in utero. Main pulmonary artery size, main pulmonary artery/aortic diameter ratio and pattern of pulmonary artery growth may be predictive of the severity of postnatal pulmonary outflow obstruction. Pulmonary atresia can develop ...
... in tetralogy of Fallot can be attributed to variable patterns of growth in utero. Main pulmonary artery size, main pulmonary artery/aortic diameter ratio and pattern of pulmonary artery growth may be predictive of the severity of postnatal pulmonary outflow obstruction. Pulmonary atresia can develop ...
Approach to Dextrocardia in Adults: Review
... tus. Thus, in situs solitus with formation of an L-bulboventricular loop (instead of the normal D-bulboventricular loop), the right-sided morphologic right atrium connects to a right-sided morphologic left ventricle, and the left-sided morphologic left atrium drains to a left-sided morphologic right ...
... tus. Thus, in situs solitus with formation of an L-bulboventricular loop (instead of the normal D-bulboventricular loop), the right-sided morphologic right atrium connects to a right-sided morphologic left ventricle, and the left-sided morphologic left atrium drains to a left-sided morphologic right ...
toward consistent definitions for preload and afterload
... Law of LaPlace (also known as the surface tension law or the Law of Young-LaPlace), stated as follows for a thin-walled spherical structure: T ⫽ PR/2, where T is wall tension, P is chamber pressure, and R is chamber radius. For a thick-walled structure such as the left ventricle, a more appropriate ...
... Law of LaPlace (also known as the surface tension law or the Law of Young-LaPlace), stated as follows for a thin-walled spherical structure: T ⫽ PR/2, where T is wall tension, P is chamber pressure, and R is chamber radius. For a thick-walled structure such as the left ventricle, a more appropriate ...
Clinical profile of congenital coronary artery anomalies with
... occurred only 11 to 24 months before death and was recurrent in two athletes (both with a history of five episodes in the previous 1 to 2 years). Episodes of chest pain (either typical or atypical of angina) had occurred in five athletes, including three during physical exertion. Each of these athle ...
... occurred only 11 to 24 months before death and was recurrent in two athletes (both with a history of five episodes in the previous 1 to 2 years). Episodes of chest pain (either typical or atypical of angina) had occurred in five athletes, including three during physical exertion. Each of these athle ...
Standard transthoracic echocardiography and transesophageal
... which encourages leaflet apposition in combination with the apical force on commissural areas by the papillary muscles (8). The anterior part of the annulus is, however, relatively immobile compared to the posterior annulus. Hence, dynamic changes in the mitral annulus are likely due to movement of ...
... which encourages leaflet apposition in combination with the apical force on commissural areas by the papillary muscles (8). The anterior part of the annulus is, however, relatively immobile compared to the posterior annulus. Hence, dynamic changes in the mitral annulus are likely due to movement of ...
Computational Fluid Dynamics Applied to Cardiac Computed
... (NPV) for lesions causing ischemia of 84.3%, 87.9%, 82.2%, 73.9%, and 92.2%, respectively, for FFRCTA (19). The performance of FFRCTA was superior to CTA stenosis for diagnosing ischemic lesions, the latter of which demonstrated an accuracy, sensitivity, specificity, PPV, and NPV of 58.5%, 91.4%, 39. ...
... (NPV) for lesions causing ischemia of 84.3%, 87.9%, 82.2%, 73.9%, and 92.2%, respectively, for FFRCTA (19). The performance of FFRCTA was superior to CTA stenosis for diagnosing ischemic lesions, the latter of which demonstrated an accuracy, sensitivity, specificity, PPV, and NPV of 58.5%, 91.4%, 39. ...
EuroEcho-Imaging 2013, Istanbul, Final Programme
... young cardiologists and researchers will be stimulated and supported through the organisation of two (clinical and basic) young investigator award sessions. In addition, the best original researches will be acknowledged through dedicated initiatives. This congress is a unique opportunity for cardiol ...
... young cardiologists and researchers will be stimulated and supported through the organisation of two (clinical and basic) young investigator award sessions. In addition, the best original researches will be acknowledged through dedicated initiatives. This congress is a unique opportunity for cardiol ...
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.