Digital Kymography for the Analysis of the Opening and Closure
... The opening and closure intervals of heart valves are important factors regarding an optimal blood flow. In particular for artificial heart valves, an analysis of those intervals is essential to estimate the physiological characteristics and to evaluate the graft as well as the implantation technique. ...
... The opening and closure intervals of heart valves are important factors regarding an optimal blood flow. In particular for artificial heart valves, an analysis of those intervals is essential to estimate the physiological characteristics and to evaluate the graft as well as the implantation technique. ...
August - Congenital Cardiology Today
... Warnings/Precautions/Side Effects: • DO NOT implant in the aortic or mitral position. Preclinical bench testing of the Melody valve suggests that valve function and durability will be extremely limited when used in these locations. ...
... Warnings/Precautions/Side Effects: • DO NOT implant in the aortic or mitral position. Preclinical bench testing of the Melody valve suggests that valve function and durability will be extremely limited when used in these locations. ...
the surgical treatment of the tetralogy of fallot
... heart and its main vessels were inspected, special attention being directed to the main pulmonary artery and its branches. At this stage, the surgeon should decide whether a two-stage operation or the complete correction is to be performed. Where the reconstruction necessitates the insertion of a pr ...
... heart and its main vessels were inspected, special attention being directed to the main pulmonary artery and its branches. At this stage, the surgeon should decide whether a two-stage operation or the complete correction is to be performed. Where the reconstruction necessitates the insertion of a pr ...
A Study of Human Right Ventricular False Tendons: Morphology
... right or left ventricle due to left bundle branch block9. It has been mentioned that interventricular septum and moderator band (in the right ventricle) has Purkinje fibers and nerves which is the direct continuation of right bundle branch10. Since false tendons attach to the ventricular wall, it ma ...
... right or left ventricle due to left bundle branch block9. It has been mentioned that interventricular septum and moderator band (in the right ventricle) has Purkinje fibers and nerves which is the direct continuation of right bundle branch10. Since false tendons attach to the ventricular wall, it ma ...
Andreas Vesalius` Tabulae anatomicae sex (1538) and the
... doubtful, claiming he was unable to see these hypothetic pores: Thus we are compelled to astonishment at the industry of the Creator who causes the blood to sweat from the right ventricle into the left through passages which escape our sight (3). Vesalius, in the second edition of his Fabrica (1555) ...
... doubtful, claiming he was unable to see these hypothetic pores: Thus we are compelled to astonishment at the industry of the Creator who causes the blood to sweat from the right ventricle into the left through passages which escape our sight (3). Vesalius, in the second edition of his Fabrica (1555) ...
Cor Pulmonale - CHEST Publications
... Chronic cor pulmonale may be defined as hypertrophy of the right ventricle initiated by pulmonary hypertension. This follows increased resistance to blood flow within the lesser circulation as a result of parenchymal pulmonary disease, primary pulmonary arteriolar disease, or marked deformity of the ...
... Chronic cor pulmonale may be defined as hypertrophy of the right ventricle initiated by pulmonary hypertension. This follows increased resistance to blood flow within the lesser circulation as a result of parenchymal pulmonary disease, primary pulmonary arteriolar disease, or marked deformity of the ...
Mutations affecting the formation and function of the cardiovascular
... anteroposterior (A-P) axis to form the different chambers. It then undergoes looping morphogenesis, and specific endocardial cells go through an epithelial to mesenchymal transition to form the prevalvular mesenchyme. The heart has several advantages for the study of the processes of organ formation ...
... anteroposterior (A-P) axis to form the different chambers. It then undergoes looping morphogenesis, and specific endocardial cells go through an epithelial to mesenchymal transition to form the prevalvular mesenchyme. The heart has several advantages for the study of the processes of organ formation ...
Diastolic Filling Characteristics in the Stage 12 to 27 Chick
... The Doppler audio output signal was passed through a custombuilt Angioscan frequency analyzer (Unigon Industries, Inc., Mt. Vernon, NY) that displayed the frequency-analyzed directional audio signal. The audio signal of a stage 27 chick embryo showed two components of the atrioventricular velocity t ...
... The Doppler audio output signal was passed through a custombuilt Angioscan frequency analyzer (Unigon Industries, Inc., Mt. Vernon, NY) that displayed the frequency-analyzed directional audio signal. The audio signal of a stage 27 chick embryo showed two components of the atrioventricular velocity t ...
Construction of the Heart`s Conduction Tree via Prim`s Algorithm
... the linear attenuation coefficient of water μwater as seen in Eqn. 1. μtissue − μwater ...
... the linear attenuation coefficient of water μwater as seen in Eqn. 1. μtissue − μwater ...
Approach to narrow QRS tachycardia
... surface ECG to the earliest deflection of the atrial activation in the His bundle electrogram; ERAA, earliest retrograde atrial activation; RHis, His bundle electrogram recorded from the right septum; LHis, His bundle electrogram recorded from the left septum; LRAS, low right atrial septum; CS os, o ...
... surface ECG to the earliest deflection of the atrial activation in the His bundle electrogram; ERAA, earliest retrograde atrial activation; RHis, His bundle electrogram recorded from the right septum; LHis, His bundle electrogram recorded from the left septum; LRAS, low right atrial septum; CS os, o ...
Association Between Left Atrial Compression And Atrial Fibrillation
... arrhythmia characterized by irregular, disorganized and rapid atrial activation leading to an irregular ventricular rhythm.1 Almost any cardiovascular condition can predispose to AF, common causes being hypertension, coronary artery disease, heart failure, valvular heart disease, cardiomyopathy, per ...
... arrhythmia characterized by irregular, disorganized and rapid atrial activation leading to an irregular ventricular rhythm.1 Almost any cardiovascular condition can predispose to AF, common causes being hypertension, coronary artery disease, heart failure, valvular heart disease, cardiomyopathy, per ...
Echocardiographic Evaluation of Orthotopic Heart Transplantation
... Conclusions: The cardiac grafts at 5 months' post-HTx follow-up were characterized by normal LV dimensions and EF. Also, RV dysfunction and tricuspid regurgitation were frequent findings, but they were not associated with the clinical signs of congestive heart failure, morbidity, and mortality in th ...
... Conclusions: The cardiac grafts at 5 months' post-HTx follow-up were characterized by normal LV dimensions and EF. Also, RV dysfunction and tricuspid regurgitation were frequent findings, but they were not associated with the clinical signs of congestive heart failure, morbidity, and mortality in th ...
Development and Evaluation of a Dynamic Cardiac Phantom for use
... blood flow in the heart through periodic movements. A mechanism is needed to enable the electrocardiogram (ECG) simulator coupled to phantom to control the time of end diastole and end systole. This coupling allows the ejection fraction of the left ventricle to be measured. Fixing a value of LVEF in ...
... blood flow in the heart through periodic movements. A mechanism is needed to enable the electrocardiogram (ECG) simulator coupled to phantom to control the time of end diastole and end systole. This coupling allows the ejection fraction of the left ventricle to be measured. Fixing a value of LVEF in ...
RHEUMATIC HEART DISEASE IN CHILDREN
... ◦ Rheumatic heart disease is the major cause of morbidity from rheumatic fever and the major cause of mitral insufficiency and stenosis in the United States and the world. ◦ Variables that correlate with severity of valve disease include the number of previous attacks of rheumatic fever, the length ...
... ◦ Rheumatic heart disease is the major cause of morbidity from rheumatic fever and the major cause of mitral insufficiency and stenosis in the United States and the world. ◦ Variables that correlate with severity of valve disease include the number of previous attacks of rheumatic fever, the length ...
Evaluation of Subclinical Left Ventricular Systolic Dysfunction Using
... with cirrhosis, especially if the patient is a candidate for any intervention that may affect haemodynamics. The recently developed two-dimensional speckletracking echocardiography (2D-STE) method has enabled a simple and angle-independent evaluation of the LV deformation in the longitudinal, radial ...
... with cirrhosis, especially if the patient is a candidate for any intervention that may affect haemodynamics. The recently developed two-dimensional speckletracking echocardiography (2D-STE) method has enabled a simple and angle-independent evaluation of the LV deformation in the longitudinal, radial ...
Cardiac Pacing in First-Degree Atrioventricular Block
... mitral valve to remain open because of delayed LV systole. With the mitral valve open, the LV end-diastolic pressure rises and exceeds left atrial pressure thereby producing diastolic mitral regurgitation, a decrease in preload (LV end-diastolic pressure) at the onset of LV systole and, ultimately, ...
... mitral valve to remain open because of delayed LV systole. With the mitral valve open, the LV end-diastolic pressure rises and exceeds left atrial pressure thereby producing diastolic mitral regurgitation, a decrease in preload (LV end-diastolic pressure) at the onset of LV systole and, ultimately, ...
Almanac 2011: Valvular Heart Disease. The National Society
... moderate-to-severe asymptomatic AS was derived and validated in an independent cohort: score=(peak velocity (m/s)×2)+(ln of BNP×1.5)+1.5 (if female sex). Event-free survival after 20 months was particularly poor (7%) for patients in the fourth quartile.6 In a separate study of patients with severe a ...
... moderate-to-severe asymptomatic AS was derived and validated in an independent cohort: score=(peak velocity (m/s)×2)+(ln of BNP×1.5)+1.5 (if female sex). Event-free survival after 20 months was particularly poor (7%) for patients in the fourth quartile.6 In a separate study of patients with severe a ...
In this Issue
... the presence of HCM more likely than in a patient without a heart murmur, however, 19-35% of cats with incidentally auscultated heart murmurs are documented to have a functional cause (most commonly dynamic right ventricular outflow obstruction). Diseases causing functional murmurs (systemic hyperte ...
... the presence of HCM more likely than in a patient without a heart murmur, however, 19-35% of cats with incidentally auscultated heart murmurs are documented to have a functional cause (most commonly dynamic right ventricular outflow obstruction). Diseases causing functional murmurs (systemic hyperte ...
Application of Lower Sternal Incision with On
... adequate myocardial perfusion, but also that the aortic valve remains in a closed condition, which prevents the air from entering the systemic circulation [Mo 2008]. Second, maintaining a surgical field without blood is necessary for successful operation. The approach we used was to cut the atrial se ...
... adequate myocardial perfusion, but also that the aortic valve remains in a closed condition, which prevents the air from entering the systemic circulation [Mo 2008]. Second, maintaining a surgical field without blood is necessary for successful operation. The approach we used was to cut the atrial se ...
... normal even in the oedematous patient. By contrast the cardiac output is low in most other kinds of "heart failure". This paradox highlights our -present ignorance of the fundamental physiology of "heart failure". The term "congestive failure" is here used to describe -a clinical syndrome 'without i ...
Sudden Cardiac Death in a 30-Year
... has been described. 4 Our patient demonstrated marked left ventricular dysfunction in the setting of only modest right ventricular hypokinesia. While this may represent an unusual presentation of ARVC primarily involving the left ventricle, these findings may also have been the result of global isch ...
... has been described. 4 Our patient demonstrated marked left ventricular dysfunction in the setting of only modest right ventricular hypokinesia. While this may represent an unusual presentation of ARVC primarily involving the left ventricle, these findings may also have been the result of global isch ...
Chapter 1
... intrinsic magnetic properties of blood flow. That is, the property of the flow velocity being directly related to the phase shift in the MR signal along a magnetic field [19, 31]. The velocity along a specified encoding direction can be detected by applying suitable bipolar gradients, where two acqu ...
... intrinsic magnetic properties of blood flow. That is, the property of the flow velocity being directly related to the phase shift in the MR signal along a magnetic field [19, 31]. The velocity along a specified encoding direction can be detected by applying suitable bipolar gradients, where two acqu ...
Morphological Study of Left Sub-Valvular Apparatus in Human
... patterns of the base and apex of papillary muscle. This study was carried out on 25 formalin-fixed human foetal hearts of gestational age ranging from 14 to 40 weeks in the department of Anatomy, RIMS, Imphal. Left ventricles were cut opened and the number, position, pattern of papillary muscle head ...
... patterns of the base and apex of papillary muscle. This study was carried out on 25 formalin-fixed human foetal hearts of gestational age ranging from 14 to 40 weeks in the department of Anatomy, RIMS, Imphal. Left ventricles were cut opened and the number, position, pattern of papillary muscle head ...
chapter 5 sudden and unexpected death
... This condition may lead to sudden cardiac death from left ventricular hypertrophy. In hypertension, the heart may increase to 600 g or more and the muscle mass thus outgrows it coronary supply, even if the coronary arteries are healthy. Atheroma is often associated with hypertension, so that the enl ...
... This condition may lead to sudden cardiac death from left ventricular hypertrophy. In hypertension, the heart may increase to 600 g or more and the muscle mass thus outgrows it coronary supply, even if the coronary arteries are healthy. Atheroma is often associated with hypertension, so that the enl ...
Figure 8.2 Pressure Balance Diagram
... pressure waveform of an isovolumic beat. He used an inverted cosine function and adjusted its amplitude, PMAX, its duration, T and its phase term, , until both the isovolumic contraction and relaxation phases of an ejecting beat each lay along opposite tails of the inverted cosine curve. The portio ...
... pressure waveform of an isovolumic beat. He used an inverted cosine function and adjusted its amplitude, PMAX, its duration, T and its phase term, , until both the isovolumic contraction and relaxation phases of an ejecting beat each lay along opposite tails of the inverted cosine curve. The portio ...
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.