Function and mechanics of the left ventricle: from
... patients with odd-shaped ventricles and wall-motion abnormalities. Besides, the inadvertent use of foreshortened views can raise its inaccuracy and low reproducibility. Alternatively, LV function can be assessed by Doppler techniques through the measurements of stroke volume using the continuity equ ...
... patients with odd-shaped ventricles and wall-motion abnormalities. Besides, the inadvertent use of foreshortened views can raise its inaccuracy and low reproducibility. Alternatively, LV function can be assessed by Doppler techniques through the measurements of stroke volume using the continuity equ ...
Familial atrial septal defect in a single - Heart
... Case 2 Chris (I2 years) was the full-term product of a normal pregnancy and uncomplicated delivery. At age 7 years he was admitted to hospital because of episodes of nocturnal dyspnoea. The physical examination revealed a widely split and fixed second heart sound, an ejection murmur at the left ster ...
... Case 2 Chris (I2 years) was the full-term product of a normal pregnancy and uncomplicated delivery. At age 7 years he was admitted to hospital because of episodes of nocturnal dyspnoea. The physical examination revealed a widely split and fixed second heart sound, an ejection murmur at the left ster ...
Treatment-Specific Approaches for Analysis and Control of
... A Left Ventricular Assist Device (LVAD) is a mechanical pump that helps patients with heart failure conditions. This rotary pump works in parallel to the ailing heart and provides an alternative path for blood flow from the weak left ventricle to the aorta. The LVAD is controlled by the power suppli ...
... A Left Ventricular Assist Device (LVAD) is a mechanical pump that helps patients with heart failure conditions. This rotary pump works in parallel to the ailing heart and provides an alternative path for blood flow from the weak left ventricle to the aorta. The LVAD is controlled by the power suppli ...
Physiological Remodelling of Mitral Valve Chordae Tendineae In
... ã Copyright by Brandon Paul Scott, 2016 ...
... ã Copyright by Brandon Paul Scott, 2016 ...
Prevalence of left ventricular dysfunction in a UK community sample
... filling) or severe dysfunction (advanced reduction in compliance). We used the E/e9 ratio, E/A ratio and mitral deceleration time to classify patients in sinus rhythm (table 1). For participants in atrial fibrillation, we used the E/e9 ratio, E/A ratio and isovolumic relaxation time11 (table 1). For p ...
... filling) or severe dysfunction (advanced reduction in compliance). We used the E/e9 ratio, E/A ratio and mitral deceleration time to classify patients in sinus rhythm (table 1). For participants in atrial fibrillation, we used the E/e9 ratio, E/A ratio and isovolumic relaxation time11 (table 1). For p ...
atrial septal defect with pulmonary hypertension - Heart
... ANATOMICAL TYPE OF A.S.D. Ostium primum defects were diagnosed in 3 instances, two with obstructive and one with hyperkinetic pulmonary hypertension; the latter proved to have a common A-V canal at operation. Wood (1958) found pulmonary hypertension in 43 per cent of 21 cases of common atrio-ventric ...
... ANATOMICAL TYPE OF A.S.D. Ostium primum defects were diagnosed in 3 instances, two with obstructive and one with hyperkinetic pulmonary hypertension; the latter proved to have a common A-V canal at operation. Wood (1958) found pulmonary hypertension in 43 per cent of 21 cases of common atrio-ventric ...
Percutaneous Closure of Left Ventricular Pseudoaneurysm
... by the pericardium. In many cases, cardiac rupture results in cardiac tamponade and death.1 In left ventricular pseudoaneurysm, however, this rupture is contained by pericardial adhesions or a new thrombus, preventing exsanguination.1– 6 The true incidence of left ventricular pseudoaneurysms is unkn ...
... by the pericardium. In many cases, cardiac rupture results in cardiac tamponade and death.1 In left ventricular pseudoaneurysm, however, this rupture is contained by pericardial adhesions or a new thrombus, preventing exsanguination.1– 6 The true incidence of left ventricular pseudoaneurysms is unkn ...
Atrial Arrhythmias After Single-Ring Isolation of the Posterior Left
... Toon Wei Lim, MBBS, FRACP; Choon Hiang Koay, BSc, RN; Rebecca McCall, BVCDes; Valerie A. See, BMedSci; David L. Ross, MBBS, FRACP; Stuart P. Thomas, PhD, FRACP ...
... Toon Wei Lim, MBBS, FRACP; Choon Hiang Koay, BSc, RN; Rebecca McCall, BVCDes; Valerie A. See, BMedSci; David L. Ross, MBBS, FRACP; Stuart P. Thomas, PhD, FRACP ...
Two-dimensional echocardiographic assessment of pulmonary
... tients, the combination of clinical and echocardiographic findings is sufficient to plan surgical therapy. During the course of our study, six additional patients underwent a systemic to pulmonary shunt procedure without cardiac catheterization. In each, arterial anatomy was correctly predicted by e ...
... tients, the combination of clinical and echocardiographic findings is sufficient to plan surgical therapy. During the course of our study, six additional patients underwent a systemic to pulmonary shunt procedure without cardiac catheterization. In each, arterial anatomy was correctly predicted by e ...
Modeling the Link between Left Ventricular Flow and
... Many approaches to modeling TE have included mathematical descriptions of the biochemical coagulation cascade, relating the flow pattern to component concentrations and shear-induced platelet activation [1,2]. Mechanistic models have been successfully applied to the design optimization of medical de ...
... Many approaches to modeling TE have included mathematical descriptions of the biochemical coagulation cascade, relating the flow pattern to component concentrations and shear-induced platelet activation [1,2]. Mechanistic models have been successfully applied to the design optimization of medical de ...
Atrial fibrillation - Giornale Italiano di Cardiologia
... Ablation of the substrate for atrial fibrillation In most patients with chronic AF and in 30-40% of patients with paroxysmal AF, PV isolation alone (without antiarrhythmic agents) is insufficient to maintain sinus rhythm13,17,21,22. Therefore, improved mapping techniques for non-PV foci or modificat ...
... Ablation of the substrate for atrial fibrillation In most patients with chronic AF and in 30-40% of patients with paroxysmal AF, PV isolation alone (without antiarrhythmic agents) is insufficient to maintain sinus rhythm13,17,21,22. Therefore, improved mapping techniques for non-PV foci or modificat ...
Aortic Stenosis: Diagnosis and Treatment
... area is less than 1 cm2, the mean gradient is greater than present. However, if echocardiographic findings suggest 40 mm Hg, or the aortic jet velocity is greater than 4 m only moderate aortic stenosis, further diagnostic testing per second. (e.g., coronary angiography, pulmonary function testing, a ...
... area is less than 1 cm2, the mean gradient is greater than present. However, if echocardiographic findings suggest 40 mm Hg, or the aortic jet velocity is greater than 4 m only moderate aortic stenosis, further diagnostic testing per second. (e.g., coronary angiography, pulmonary function testing, a ...
Central Venous Pressure: Principles, Measurement, and Interpretation
... compliance is normal. Therefore, CVP cannot be assessed, or preload inferred, if compliance of the ventricle is abnormal. Decreased right ventricular compliance can increase the CVP. Pathologic processes leading to decreased right ventricular compliance include disorders that increase myocardial sti ...
... compliance is normal. Therefore, CVP cannot be assessed, or preload inferred, if compliance of the ventricle is abnormal. Decreased right ventricular compliance can increase the CVP. Pathologic processes leading to decreased right ventricular compliance include disorders that increase myocardial sti ...
19 The Jugular Venous Pressure And Pulse Contour
... vena cava and the right ventricle accommodates this increased venous return . When constrictive pericarditis is present, phasic blood flow does not occur in the superior vena cava . Thus, during inspiration the mean venous pressure rises (Kussmaul's sign) . Unfortunately, this sign is sensitive but ...
... vena cava and the right ventricle accommodates this increased venous return . When constrictive pericarditis is present, phasic blood flow does not occur in the superior vena cava . Thus, during inspiration the mean venous pressure rises (Kussmaul's sign) . Unfortunately, this sign is sensitive but ...
Matching Questions - Sinoe Medical Association
... A) The all-or-none law as applied to cardiac muscle means that the entire heart contracts as a unit or it does not contract at all. B) Cardiac muscle cells are each innervated by a sympathetic nerve ending so that the nervous system can increase heart rate. C) The refractory period in skeleta ...
... A) The all-or-none law as applied to cardiac muscle means that the entire heart contracts as a unit or it does not contract at all. B) Cardiac muscle cells are each innervated by a sympathetic nerve ending so that the nervous system can increase heart rate. C) The refractory period in skeleta ...
Cardiac phase-dependent time normalization reduces - VU-dare
... show that isochrones and also the ESPVR are generally nonlinear and that the degree of nonlinearity depends on the contractile state. In addition, studies investigating the length-tension relationship of mammalian papillary muscle showed that the time-course of isometric and isotonic contraction var ...
... show that isochrones and also the ESPVR are generally nonlinear and that the degree of nonlinearity depends on the contractile state. In addition, studies investigating the length-tension relationship of mammalian papillary muscle showed that the time-course of isometric and isotonic contraction var ...
Influence of Myocardial Fibrosis on Left Ventricular Diastolic Function
... Background—Fibrosis is a common end point of many pathological processes affecting the myocardium and may alter myocardial relaxation properties. By measuring myocardial fibrosis with cardiac magnetic resonance and diastolic function with Doppler echocardiography, we sought to define the influence o ...
... Background—Fibrosis is a common end point of many pathological processes affecting the myocardium and may alter myocardial relaxation properties. By measuring myocardial fibrosis with cardiac magnetic resonance and diastolic function with Doppler echocardiography, we sought to define the influence o ...
Role of Structural Barriers in the Mechanism of Alternans
... rate of 150 bpm during control and in the presence of the structural barrier. Mean conduction velocity transverse to fibers measured during control (24 ...
... rate of 150 bpm during control and in the presence of the structural barrier. Mean conduction velocity transverse to fibers measured during control (24 ...
Atrial fibrillation and flutter
... the associated heart rate response is not rapid. If symptoms occur, their severity is determined by the underlying condition of the heart, and patients’ heart rate at rest and during exercise. Patients may describe fatigue or reduced effort tolerance, or more definite symptoms of palpitation, dyspno ...
... the associated heart rate response is not rapid. If symptoms occur, their severity is determined by the underlying condition of the heart, and patients’ heart rate at rest and during exercise. Patients may describe fatigue or reduced effort tolerance, or more definite symptoms of palpitation, dyspno ...
Abnormality of mitral valve leaflets and the papillary muscle or
... Valve repair is typically the surgical procedure of choice Valvular replacement may be required for ...
... Valve repair is typically the surgical procedure of choice Valvular replacement may be required for ...
Ventricular Fibrillation: A Pediatric Problem
... The American Heart Association explains the congenital heart defect ventricular septal defect, VSD in After surgery to close a VSD, a pediatric Problems You Learn more about Atrial Septal Defect. Atrial Septal Defects: Matthew s Story. placing us in the top tier of pediatric cardiac programs. Ventri ...
... The American Heart Association explains the congenital heart defect ventricular septal defect, VSD in After surgery to close a VSD, a pediatric Problems You Learn more about Atrial Septal Defect. Atrial Septal Defects: Matthew s Story. placing us in the top tier of pediatric cardiac programs. Ventri ...
Despite the many decades of intensive research, left ventricular
... Our results are partly contradictory to data obtained by Pereira and Mandarim-deLacerda (2003). In the spontanously hypertensive rats (SHR) they demonstrated that although spironolactone reduced blood pressure, improved capillarisation of myocardial tissue and using high dose reduced fibrosis in the ...
... Our results are partly contradictory to data obtained by Pereira and Mandarim-deLacerda (2003). In the spontanously hypertensive rats (SHR) they demonstrated that although spironolactone reduced blood pressure, improved capillarisation of myocardial tissue and using high dose reduced fibrosis in the ...
Transcatheter Closure of Post-operative Residual Ventricular Septal
... the delivery cable, after which it still sat nicely across the defect. When the angiogram was repeated, the position was found to be stable, but other residual VSDs were identified. Our attempt to cross the other residual VSDs using a guide wire and a JR catheter was unsuccessful. Finally, we decide ...
... the delivery cable, after which it still sat nicely across the defect. When the angiogram was repeated, the position was found to be stable, but other residual VSDs were identified. Our attempt to cross the other residual VSDs using a guide wire and a JR catheter was unsuccessful. Finally, we decide ...
Heart size-independent analysis of myocardial
... crystal placed on the anterior free wall to measure instantaneous wall thickness. Highly linear -⑀ relations were obtained in control (n ⫽ 7) and hypertrophied mice produced by 7 days of transverse aortic constriction (TAC; n ⫽ 13). Administration of dobutamine in control mice significantly increas ...
... crystal placed on the anterior free wall to measure instantaneous wall thickness. Highly linear -⑀ relations were obtained in control (n ⫽ 7) and hypertrophied mice produced by 7 days of transverse aortic constriction (TAC; n ⫽ 13). Administration of dobutamine in control mice significantly increas ...
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.