Right Ventricular Contractile Function
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Right Ventricular Contractile Function
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Author : H. Alex Leather
language : en
Publisher: Leuven University Press
Release Date : 2005
Right Ventricular Contractile Function written by H. Alex Leather and has been published by Leuven University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Heart categories.
This is a Ph.D. dissertation. Introduction, The limitations of preload-adjusted maximal power as an index of right ventricular contractility, Preload-adjusted maximal power of the right ventricle: contribution of the intercept of the end-systolic P-V relation (Vd), Regional indices of global right ventricular contractility: longitudinal versus circumferential axis, and isovolumic versus ejection phase indicies, Acute pulmonary hypertension causes depression of left ventricular contractility and relaxation, Effects of vasopressin on right ventricular function in an experimental model of acute pulmonary hypertension, Effects of levosimendan on right ventricular function and ventriculovascular coupling in open chest pigs, Discussion.
The Right Ventricle In Health And Disease
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Author : Norbert F. Voelkel
language : en
Publisher: Springer
Release Date : 2014-10-29
The Right Ventricle In Health And Disease written by Norbert F. Voelkel and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-29 with Medical categories.
The Right Ventricle in Health and Disease provides a comprehensive and up-to-date database and collection of the available information which describes the structure and function of the normal right ventricle. The right ventricular performance and function reserve has now finally moved to the center of the stage as clinicians recognize that the drugs presently used to treat patients with severe pulmonary hypertension do not necessarily improve the performance of the right ventricle and because the survival depends on the right ventricular function that treatment strategies need to be developed to primarily protect the right ventricle from failing. In-depth chapters discuss right heart function and failure in patients with congenital heart diseases, review modern imaging techniques used to describe right ventricular form and function in patients with right heart failure (including cardiac MRI and PET scanning), describe ventricular interdependence: the left ventricle in pulmonary hypertension and discuss the concept of the sick lung circulation and its contribution to right heart failure. Treatment strategies of chronic right heart failure including drugs and mechanical devices are also discussed.
Echocardiography In Heart Failure And Cardiac Electrophysiology
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Author : Umashankar Lakshmanadoss
language : en
Publisher: BoD – Books on Demand
Release Date : 2016-10-19
Echocardiography In Heart Failure And Cardiac Electrophysiology written by Umashankar Lakshmanadoss and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-19 with Medical categories.
The world of echocardiography continues to be full of exciting new technological developments with an ultimate goal of better patient care. In this book, titled "Echocardiography in Heart Failure and Cardiac Electrophysiology", authors from various parts of the world contributed to the advancement of the field. We have included various chapters about the use of echocardiography and modalities of imaging in various common clinical scenarios - ranging from evaluation of commonly ignored right ventricle, imaging in congestive heart failure, to echocardiographic evaluation of critically ill patients. We have also included topics describing the use of echocardiography in cardiac electrophysiology with special interest to cardiac resynchronization therapy and atrial fibrillation ablation. These topics would be of great interest to the clinicians whether they are trainees, physicians, advanced care providers, or anyone involved in the patient care.
The Right Ventricle
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Author : Marvin A. Konstam
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Right Ventricle written by Marvin A. Konstam and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Medical categories.
It is quite natural that literature related to car heart disease, cardiomyopathy, pulmonary and diac structure, function, pathology, and patho pulmonary vascular disease, trauma, acquired valvular disease, congenital disease, and surgi physiology has emphasized the left heart and systemic circulation. The relative lack of im cal considerations. The pathologic and clinical relevance of myocardial infarction of the right portance of the right ventricle was supported by studies performed in the 1940s and 1950s ventricle has only been documented over the which suggested that the right ventricular free last 15 years. The chapter on right ventricular wall could be effectively destroyed in an animal infarction integrates clinical, functional, patho model without detectable untoward hemody physiologic, and pathologic observations to pro namic consequences. The relative inadequacy vide the reader with a thorough review, equally of noninvasive tools to study right ventricular relevant to the clinician and investigator. The contribution on dilated cardiomyopathy pro structure and function obviated detailed and systematic investigation. However, over the vides novel insight into the impact of right ventricular performance on the functional in past 15 years there has been a resurgence of interest in the right ventricle by a variety of capacity accompanying left heart failure. A book dealing with the right ventricle would investigators. The skeptic would argue that this renewed interest resulted from an exhaustion be incomplete without at least cursory reference we have of clinically-related observations that could be to the pulmonary circulation.
3d Echocardiography
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Author : Takahiro Shiota
language : en
Publisher: CRC Press
Release Date : 2020-12-29
3d Echocardiography written by Takahiro Shiota and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-29 with Medical categories.
Since the publication of the second edition of this volume, 3D echocardiography has penetrated the clinical arena and become an indispensable tool for patient care. The previous edition, which was highly commended at the British Medical Book Awards, has been updated with recent publications and improved images. This third edition has added important new topics such as 3D Printing, Surgical and Transcatheter Management, Artificial Valves, and Infective Endocarditis. The book begins by describing the principles of 3D echocardiography, then proceeds to discuss its application to the imaging of • Left and Right Ventricle, Stress Echocardiography • Left Atrium, Hypertrophic Cardiomyopathy • Mitral Regurgitation with Surgical and Nonsurgical Procedures • Mitral Stenosis and Percutaneous Mitral Valvuloplasty • Aortic Stenosis with TAVI / TAVR • Aortic and Tricuspid Regurgitation • Adult Congenital Heart Disease, Aorta • Speckle Tracking, Cardiac Masses, Atrial Fibrillation KEY FEATURES In-depth clinical experiences of the use of 3D/2D echo by world experts Latest findings to demonstrate clinical values of 3D over 2D echo One-click view of 263 innovative videos and 352 high-resolution 3D/2D color images in a supplemental eBook.
The Right Ventricle In Volume Or Pressure Overload
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Author : Aleksandra Trzebiatowska-Krzynska
language : en
Publisher: Linköping University Electronic Press
Release Date : 2019-01-07
The Right Ventricle In Volume Or Pressure Overload written by Aleksandra Trzebiatowska-Krzynska and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-07 with categories.
This study is inspired by the gap in knowledge regarding the timing of cardiac surgery and interventions in adult patients with congenital heart disease. There are many parameters used assessing right ventricular function; however, most of them have pitfalls. Understanding the pathomechanisms by which the heart adapts to congenital defects is probably key to find the answer when it is time to intervene and start discussing treatment options. Heart defects are the most frequently occurring congenital disorders. Less than 50% of individuals with moderate to severe congenital heart defects, e.g. transposition of the great arteries (TGA) or tetralogy of Fallot (TOF), survive to adulthood without intervention. Advances in cardiac surgery and better identification of individuals at risk for sudden cardiac death have increased survival rates. Currently, more than 96% of patients with congenital heart disease survive to at least 16 years of age; most undergo corrective surgery but are not cured, and only a few have normal physiology and anatomy. In many cases, the heart must develop mechanisms of adaptation to the changed conditions after surgery. Consequently, correction of the defect creates residual disease with a risk of future complications. To prevent clinical deterioration and to identify the development of complications, patients need lifelong, regular follow up. The choice of followup modalities depends on the cardiac malformation. The right ventricle (RV) plays an important role, as it is often part of the defect or is influenced by the surgery. In the past, research was focused on assessment of left ventricular function (LV), and the RV was “the forgotten ventricle.” Observations and studies in the last few decades brought increased interest into the RV and revealed the importance of the RV in the prognosis of various cardiac diseases. An understanding of RV morphology, pathophysiology and adaptive mechanisms is crucial for further studies of prognosis as well as for research linked to the use of particular diagnostic modalities. When the RV is exposed to increased pressure load, e.g. in atrially corrected transposition of the great arteries (TGA), adaptation affects the cavity volume as well as the wall thickness. When the RV is volume overloaded, adaptation involves enhancement of the RV cavity volume while the wall thickness often remains unchanged under long time. RV ejection fraction (RVEF) gives some information about changes in RV function, but information on myocardial contractility and contractile reserve is also needed. New functional parameters such as strain—also known as myocardial deformation—provide some information about intrinsic myocardial function. In Paper I, we studied functional parameters such as ejection fraction and strain (radial and longitudinal strain for both ventricles) in patients with Tetralogy of Fallot (TOF) and TGA. Longitudinal RV strain was depressed in both patient groups in comparison with that in healthy individuals, and there were additional differences between the two patient groups. In Paper II, we validated three-dimensional echocardiography (3DEcho) against the cardiac magnetic resonance (CMR) gold standard. The study population was limited to patients with TOF. In general, 3DEcho underestimated RV volumes but was able to identify patients with RV dilatation on CMR with high sensitivity. RV longitudinal free wall strain measured by CMR with a cut-off set at -14% identified patients with depressed exercise capacity and low peak oxygen uptake. In Paper III, we studied a new CMR method to quantify and visualise turbulent flow in the heart and vessels. Turbulent flow can be harmful to tissue, blood cells, and endothelium and can contribute to tissue remodeling. In patients with TOF, turbulent flow can be seen as variance in 2DEcho color Doppler. In CMR, increased turbulent kinetic energy (TKE) could be seen with four-dimensional flow. The RV TKE was increased in patients with TOF with pulmonary regurgitation compared with that in healthy controls. In Paper IV, we validated “knowledge-based reconstruction” (KBR), a novel method to calculate RV volume, against CMR in patients with various types of congenital heart defects. Two-dimensional echocardiogram-based threedimensional RV reconstruction is a relatively uncomplicated method that creates a three-dimensional RV model based on a limited number of predefined points of interest (RV structures such as tricuspid annulus, RV free wall, or pulmonary valve). KBR showed good agreement with CMR (intraclass correlation coefficient = 0.84 for RV end-diastolic volume and 0.89 for ejection fraction) but tended to underestimate RV volumes, which is in line with other methods based on ultrasound. Conclusions: 3DEcho is an evolving modality that is able to identify patients with RV dilatation. It can be used clinically for the follow up of patients with congenital heart diseases, especially those with mildly to moderately dilated RVs. When an intervention seems likely, 3DEcho results should be verified by CMR. CMR-derived measurements of longitudinal and radial strain provide a new understanding of RV remodeling and ventricular interdependence in patients with TOF and TGA. Depressed longitudinal strain may indicate a risk of depressed exercise capacity and, in patients with TGA, clinical deterioration. Further studies in larger populations of patients with congenital heart defects are needed, as the altered RV morphology in such patients makes quantitative assessment especially challenging.
Right Ventricular Physiology Adaptation And Failure In Congenital And Acquired Heart Disease
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Author : Mark K. Friedberg
language : en
Publisher: Springer
Release Date : 2017-12-19
Right Ventricular Physiology Adaptation And Failure In Congenital And Acquired Heart Disease written by Mark K. Friedberg and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Medical categories.
This book spans topics in both congenital and acquired right heart disease providing readers with detailed information on the physiology, anatomy and myocardial mechanics of the right ventricle (RV), while describing the use of echo and MRI imaging to diagnose, and new developments in surgery and cardiac catheterization to treat. Right Ventricular Physiology, Adaptation and Failure in Congenital and Acquired Heart Disease includes extensive discussion of RV-pulmonary interactions, pulmonary hypertension and ventricular-ventricular interactions, including specific topics in embryology, fetal RV function, RV mechanics, pathophysiology of RV adaptation/ failure, molecular aspects of RV dysfunction, congenital heart disease, pulmonary arterial hypertension, pulmonary valve replacement, stem cell and future therapies. It is thus important reading for all cardiovascular medicine professionals, but especially pediatric cardiologists and surgeons, those who manage t hese patients in the cardiac care unit and investigators studying the RV.
Faces Of Right Ventricular Failure An Issue Of Cardiology Clinics
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Author : James A. Goldstein
language : en
Publisher: Elsevier Health Sciences
Release Date : 2012-05-15
Faces Of Right Ventricular Failure An Issue Of Cardiology Clinics written by James A. Goldstein and has been published by Elsevier Health Sciences this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-15 with Medical categories.
Although heart failure typically begins with the left side of the heart, it is also important for cardiologists to understand right-sided heart failure, which is the inability of the right side of the heart to adequately pump venous blood into the pulmonary circulation. Right heart failure causes a back-up of fluid in the body, resulting in swelling and edema. This issue covers the normal right ventricle (RV), imaging of the RV, RV failure in a variety of settings, and tratmen tof RV failure, including interventions.
The Failing Right Heart
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Author : Kyriakos Anastasiadis
language : en
Publisher: Springer
Release Date : 2015-06-29
The Failing Right Heart written by Kyriakos Anastasiadis and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-29 with Medical categories.
This book provides an up-to-date and comprehensive overview of the etiology, diagnosis and treatment of conditions affecting the structure and function of the right heart, comprising the right atrium, right ventricle, tricuspid valve and pulmonary circulation. Anatomy and physiology of the right heart, etiology and role of imaging of right heart failure, as well as treatment options, from pharmacological regimes to surgery are included in the text. Algorithms and flow diagrams are provided with illustrated snapshots of the decisions involved in the management of these patients. The Failing Right Heart is aimed to serve as an essential reference for cardiac surgeons, cardiologists, cardiac anesthesiologists and cardiac intensivists on the diagnosis and treatment of patients with congenital or acquired right heart disease.
The Right Heart
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Author : Sean P. Gaine
language : en
Publisher: Springer
Release Date : 2014-05-12
The Right Heart written by Sean P. Gaine and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-12 with Medical categories.
The heart and lung are intricately linked. When the heart is affected by disease, the lungs will often show some related pathological or clinical conditions and vice versa. Pulmonary heart disease is by definition a condition when the lungs cause the heart to fail. The left ventricle in combination with the other structures in the “left heart” pumps blood throughout the body. The right ventricle (and structures of the “right heart”) pumps blood to the lungs where it is oxygenated and returned to the left heart for distribution. In normal circumstances, the right heart pumps blood into the lungs without any resistance. The lungs usually have minimal pressure and the right heart easily pumps blood through. However when there is lung disease present, like emphysema, chronic obstructive lung disease (COPD) or pulmonary hypertension- the small blood vessels become very stiff and rigid. The right ventricle is no longer able to push blood into the lungs and eventually fails. This is known as pulmonary heart disease. Pulmonary heart disease is also known as right heart failure or cor pulmonale. The chief cause of right heart failure is the increase in blood pressure in the lungs (pulmonary artery).