Four-Chamber Heart Modeling and Automatic
... model is more accurate concerning the anatomy, compared to previous closed-surface mesh models [4]–[6]. 2) Important landmarks (e.g., valves and ventricular septum cusps) are explicitly represented in our model as control points1 . These landmarks can be detected reliably to guide the automatic mode ...
... model is more accurate concerning the anatomy, compared to previous closed-surface mesh models [4]–[6]. 2) Important landmarks (e.g., valves and ventricular septum cusps) are explicitly represented in our model as control points1 . These landmarks can be detected reliably to guide the automatic mode ...
Stretch-induced modifications of myocardial performance: from
... what would be called the Starling or the Frank-Starling law of the heart, that is the increase in ventricular performance induced by increased filling. At the time when Starling was working on the heart-lung preparation, it was well known that muscles contract more forcibly when stretched. In his fa ...
... what would be called the Starling or the Frank-Starling law of the heart, that is the increase in ventricular performance induced by increased filling. At the time when Starling was working on the heart-lung preparation, it was well known that muscles contract more forcibly when stretched. In his fa ...
Integration of 3D Imaging Data in the Assessment of Aortic Stenosis
... Estimation of aortic valve area (AVA) with transthoracic echocardiographic (TTE)-continuity equation (CE) assumes a circular left ventricular outflow tract (LVOT). We evaluated incremental utility of 3D multidetector computed tomography (MDCT) over TTE assessment of AS severity. Methods and Results— ...
... Estimation of aortic valve area (AVA) with transthoracic echocardiographic (TTE)-continuity equation (CE) assumes a circular left ventricular outflow tract (LVOT). We evaluated incremental utility of 3D multidetector computed tomography (MDCT) over TTE assessment of AS severity. Methods and Results— ...
Retrograde perfusion of coronary circulation
... The smooth muscle cells of the coronary arterial media derive from the subepicardial layer, whereas the subepicardially located cardiac veins recruit atrial myocardium. ...
... The smooth muscle cells of the coronary arterial media derive from the subepicardial layer, whereas the subepicardially located cardiac veins recruit atrial myocardium. ...
2000-2002
... Heart valves control the flow of blood as it enters the heart and is pumped from the chambers of the heart to the lungs for oxygenation and back to the body. ere are four valves: the tricuspid, mitral, pulmonic and aortic valves. Heart valve disease occurs when a valve cannot open all the way becau ...
... Heart valves control the flow of blood as it enters the heart and is pumped from the chambers of the heart to the lungs for oxygenation and back to the body. ere are four valves: the tricuspid, mitral, pulmonic and aortic valves. Heart valve disease occurs when a valve cannot open all the way becau ...
An Analysis of the Mechanical Disadvantage of Myocardial Infarction
... function curves are calculated, for infarcts of varying size and material properties. These computations indicate a progressive degradation of cardiac performance with increasing infarct size such that normal cardiac outputs can be maintained with Frank-Starling compensation and increased heart rate ...
... function curves are calculated, for infarcts of varying size and material properties. These computations indicate a progressive degradation of cardiac performance with increasing infarct size such that normal cardiac outputs can be maintained with Frank-Starling compensation and increased heart rate ...
Computational Modeling of Aortic Heart Valves
... more accurately recreates the multilayered anisotropic leaflet as compared to the simple isotropic model. This fiber-reinforced model greatly reduced peak systolic stresses in the leaflets, compressive and tensile. The fiber-reinforcement also stabilized the leaflets during opening and closing, elim ...
... more accurately recreates the multilayered anisotropic leaflet as compared to the simple isotropic model. This fiber-reinforced model greatly reduced peak systolic stresses in the leaflets, compressive and tensile. The fiber-reinforcement also stabilized the leaflets during opening and closing, elim ...
Surgical treatment on venous connection of total anomalous
... Time to choose for the surgery; TAPVC is one of the few heart diseases that requires surgical treatment during the neonatal period. If it is left without surgery, about 75% shall die within 1 year. For the child patients that have pulmonary vein backflow obstruction, the death rate could be up to 50 ...
... Time to choose for the surgery; TAPVC is one of the few heart diseases that requires surgical treatment during the neonatal period. If it is left without surgery, about 75% shall die within 1 year. For the child patients that have pulmonary vein backflow obstruction, the death rate could be up to 50 ...
Left Atrial Volume Index as a Clinical Marker for Atrial Fibrillation
... severity of the heart disease reaching up to 40% in advanced cases. In patients with heart failure, AF is an independent predictor of morbidity and mortality increasing the risk of death and hospitalization. It is well known that the presence of atrial enlargement in patients with organic heart dise ...
... severity of the heart disease reaching up to 40% in advanced cases. In patients with heart failure, AF is an independent predictor of morbidity and mortality increasing the risk of death and hospitalization. It is well known that the presence of atrial enlargement in patients with organic heart dise ...
5 rIGHt VentrIcular PacInG ImProVes rIGHt Heart FunctIon In
... and to study ventricular dyssynchrony in detail, a Langendorff-setup was used as previously described, with balloons in left and right ventricle (Figure 1).14 The heart was perfused (at 35-37° C) using a modified Krebs-Henseleit solution (composition in mM: 118.5 NaCl, 4.7 KCl, 1.4 CaCl2, 25 NaHCO3, ...
... and to study ventricular dyssynchrony in detail, a Langendorff-setup was used as previously described, with balloons in left and right ventricle (Figure 1).14 The heart was perfused (at 35-37° C) using a modified Krebs-Henseleit solution (composition in mM: 118.5 NaCl, 4.7 KCl, 1.4 CaCl2, 25 NaHCO3, ...
Atrial Fibrillation - CardiacAndVascular.com
... especially during physical activity. For this reason people with atrial fibrillation have a decreased ability to exercise. Stroke is the major complication caused by atrial fibrillation. When blood does not completely empty out of the rapidly beating atria, a clot can develop in the blood that pools ...
... especially during physical activity. For this reason people with atrial fibrillation have a decreased ability to exercise. Stroke is the major complication caused by atrial fibrillation. When blood does not completely empty out of the rapidly beating atria, a clot can develop in the blood that pools ...
Right ventricular dilated cardiomyopathy - Heart
... severe heart failure associated with a slow junctional rhythm. In three patients (cases 1, 3, and 4) arrhythmias preceded the onset of heart failure by up to two years. Ventricular arrhythmias occurred in eight patients (ventricular tachycardia (four) and frequent ventricular premature beats (four)) ...
... severe heart failure associated with a slow junctional rhythm. In three patients (cases 1, 3, and 4) arrhythmias preceded the onset of heart failure by up to two years. Ventricular arrhythmias occurred in eight patients (ventricular tachycardia (four) and frequent ventricular premature beats (four)) ...
Academic paper: Reversing Heart Failure: Diastolic Recoil in a
... In the sense that it is mine to give, I dedicate this work to my parents and siblings. A source of encouragement and guidance, it is largely due to my family that I have had the opportunities that enabled me to undertake this project. My five siblings are a boundless joy to me with their love, assis ...
... In the sense that it is mine to give, I dedicate this work to my parents and siblings. A source of encouragement and guidance, it is largely due to my family that I have had the opportunities that enabled me to undertake this project. My five siblings are a boundless joy to me with their love, assis ...
Dynamics of the Pulmonary Venous Flow in the Fetus
... Background—The usual positioning of the Doppler sample volume to assess fetal pulmonary vein flow is in the distal portion of the vein, where the vessel diameter is maximal. This study was performed to test the association of the pulmonary vein pulsatility index (PVPI) with the vessel diameter. Meth ...
... Background—The usual positioning of the Doppler sample volume to assess fetal pulmonary vein flow is in the distal portion of the vein, where the vessel diameter is maximal. This study was performed to test the association of the pulmonary vein pulsatility index (PVPI) with the vessel diameter. Meth ...
Use of Echocardiography in the Diagnosis of Dilated
... echocardiography (suspicious for early DCM), it can be very helpful to stress the dog during echocardiography (i.e., by showing him another animal or food). As soon as heart rate increases, contractility in normal dogs should increase into reference ranges. If still uncertain, it may be necessary to ...
... echocardiography (suspicious for early DCM), it can be very helpful to stress the dog during echocardiography (i.e., by showing him another animal or food). As soon as heart rate increases, contractility in normal dogs should increase into reference ranges. If still uncertain, it may be necessary to ...
Trying to succeed when the right ventricle fails
... patients with systolic and diastolic heart failure and are associated with poor survival. Simple echocardiographic and MRI indices of right ventricular function relate to prognosis and may also be useful in following response to therapy. Management of acute and chronic right ventricular failure is l ...
... patients with systolic and diastolic heart failure and are associated with poor survival. Simple echocardiographic and MRI indices of right ventricular function relate to prognosis and may also be useful in following response to therapy. Management of acute and chronic right ventricular failure is l ...
Development of the Heart
... will close the foramen ovale ,forming a complete partition between the 2 atria. An oval depression in the lower part of interatrial septum of right atrium…. The fossa ovalis is a remnant of the foramen ovale. ...
... will close the foramen ovale ,forming a complete partition between the 2 atria. An oval depression in the lower part of interatrial septum of right atrium…. The fossa ovalis is a remnant of the foramen ovale. ...
Bilateral Ventricular Hypertrophy Due to Chronic
... such a cardiac displacement). While with pulmonary heart disease the very rare occurrence of a prominent P wave in the precordial leads has been observed before (Michelson) , case 24 is the only instance where the author found this formation to be transient. Such an instability of the P wave support ...
... such a cardiac displacement). While with pulmonary heart disease the very rare occurrence of a prominent P wave in the precordial leads has been observed before (Michelson) , case 24 is the only instance where the author found this formation to be transient. Such an instability of the P wave support ...
NATIONAL QUALITY FORUM
... The measure information you submit will be shared with NQF’s Steering Committees and Technical Advisory Panels to evaluate measures against the NQF criteria of importance to measure and report, scientific acceptability of measure properties, usability, and feasibility. Four conditions (as indicated ...
... The measure information you submit will be shared with NQF’s Steering Committees and Technical Advisory Panels to evaluate measures against the NQF criteria of importance to measure and report, scientific acceptability of measure properties, usability, and feasibility. Four conditions (as indicated ...
Ventricular tachycardia in abnormal heart
... In LVH action potential prolongation is due to a decrease in Ito. This results in nonhomogeneous repolarization and propensity for EAD Hypertrophied myocytes may produce DAD due to an increase in Ca load Abnormal pacemaker current (If) has been reported in LVH. Intensity of this current increas ...
... In LVH action potential prolongation is due to a decrease in Ito. This results in nonhomogeneous repolarization and propensity for EAD Hypertrophied myocytes may produce DAD due to an increase in Ca load Abnormal pacemaker current (If) has been reported in LVH. Intensity of this current increas ...
Systolic Longitudinal Function of the Left Ventricle Assessed by
... systolic longitudinal strains (PSLSs) by two-dimensional speckle tracking echocardiography (STE) may correlate with conventional echocardiography findings. We aimed to use STE to evaluate the longitudinal function of the LV in patients with HFNEF. Methods: In this study, 126 patients with HFNEF and ...
... systolic longitudinal strains (PSLSs) by two-dimensional speckle tracking echocardiography (STE) may correlate with conventional echocardiography findings. We aimed to use STE to evaluate the longitudinal function of the LV in patients with HFNEF. Methods: In this study, 126 patients with HFNEF and ...
Pathophysiology of right ventricular failure
... Like the LV, the RV can use the FrankStarling mechanism to increase stroke work as a consequence of an increase in RV stretch (27). However, the relatively flat relationship between RV surface area and RV volume described previously means that large changes in RV volume are necessary before the Frank ...
... Like the LV, the RV can use the FrankStarling mechanism to increase stroke work as a consequence of an increase in RV stretch (27). However, the relatively flat relationship between RV surface area and RV volume described previously means that large changes in RV volume are necessary before the Frank ...
Fetal echocardiography: 20 years of progress - Heart
... The venous duct determines the flow of oxygenated blood to the left side of the circulation. It is a small conical structure, measuring 1–2 mm at its narrowest portion, connecting the intrahepatic part of the umbilical vein to the inferior caval vein, closing after birth. Doppler signals from this v ...
... The venous duct determines the flow of oxygenated blood to the left side of the circulation. It is a small conical structure, measuring 1–2 mm at its narrowest portion, connecting the intrahepatic part of the umbilical vein to the inferior caval vein, closing after birth. Doppler signals from this v ...
Understanding your child`s heart Common arterial trunk (Truncus
... stopped and a heart-lung machine takes over the function of the heart and lungs. The right and left pulmonary arteries are disconnected from the single large artery and reconnected to the right ventricle using a tube with a valve inside it. (See illustration on page 15.) A human valve is usually use ...
... stopped and a heart-lung machine takes over the function of the heart and lungs. The right and left pulmonary arteries are disconnected from the single large artery and reconnected to the right ventricle using a tube with a valve inside it. (See illustration on page 15.) A human valve is usually use ...
The right ventricle in pulmonary arterial hypertension
... generate a family of RV pressure–volume loops at decreased venous return was recently introduced and validated [14]. The practicality and clinical relevance of this approach will require confirmation. Since Emax is insensitive to immediate changes in preload or afterload, single beat methods have be ...
... generate a family of RV pressure–volume loops at decreased venous return was recently introduced and validated [14]. The practicality and clinical relevance of this approach will require confirmation. Since Emax is insensitive to immediate changes in preload or afterload, single beat methods have be ...
Mitral insufficiency
Mitral insufficiency (MI), mitral regurgitation or mitral incompetence is a disorder of the heart in which the mitral valve does not close properly when the heart pumps out blood. It is the abnormal leaking of blood backwards from the left ventricle, through the mitral valve, into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium. MI is the most common form of valvular heart disease.