View clinical trials related to Ventricular Dysfunction.
Filter by:Calcified aortic stenosis is the most frequent valvulopathy in Europe and North America. Aortic stenosis is an obstacle to the ejection of blood from the left ventricle to the aorta and leads to morphological changes in the left ventricle and hemodynamic modifications. Intrinsic ventricular performance can be characterized using three parameters: - Ventricular elastance (Ees for End Systolic Elastance) which represents the index of ventricular contractility independently of the load. - Arterial elastance (Ea for Arterial Elastance) which represents the post-load - The ventriculo-arterial coupling index (Ees / Ea) which represents energy efficiency. For patients with high surgical risk (EuroSCORE II> 6), TAVI (Transcatheter Aortic Valve Implantation) is recommended for aortic valve replacement. Many complications may occur after TAVI (haemorrhagic, embolic, renal, myocardial ischemia). Post-TAVI complications may also be cardiac decompensation of the underlying cardiac disease to cardiogenic shock. However, literature on left ventricular performance after aortic valvular replacement is poor because of the difficulty and invasiveness of the analysis involved. Cardiac energy analysis plays an additional role in understanding the clinical patients conditions. On this point, cardiac energy modifications, based on ventriculo-arterial coupling, could be indicators of cardiac function. Two methods (ultrasound and pulse contour) are used to understand and explore the ventriculo-arterial coupling, preload, postload, contractility and hemodynamic changes interactions. Echocardiography allows the Ees / Ea and SW / PVA (Stoke work/ pressure-volume area) ratios mesurements. PRAM (Pressure Recording Analytical Method) through the MostCare® monitor, gives common hemodynamic parameters and more specific parameters such as arterial elastance (Ea) cardiac cycle efficiency (CCE), dP / dt. Cardiac cycle efficiency (CCE) is an exclusive variable that describes the hemodynamic performance in terms of energy expenditure in the patient being followed. TAVI procedure is an acute model of ventriculo-arterial coupling modification by treatment of the ventricular ejection obstacle. The PRAM method evaluates the ventriculo-arterial coupling. The aim of our study is to evaluate by PRAM the changes in cardiac energy variables before and after aortic valve replacement by TAVI
The right side of the heart of often overlooked in patients who are acutely unwell, as the main area of focus when performing echocardiography tends to be the left ventricle. The right ventricle can yield important diagnostic clues that can aid the clinician, particularly in cases where one may suspect elevated right sided pressures, such as those due to a pulmonary embolus. Although it is taught that a dilated right ventricle is associated in patients with pulmonary embolus, but in patients with spontaneous circulation. What is unknown is patients who sustain a cardiac arrest, does the same hold true. There is a paucity of literature surrounding the appearance of the right ventricle in the cardiac arrest patient acutely. This study aims to assess right ventricular size and function in the immediate post cardiac arrest phase.
The goal of this interventional crossover study, in intubated and mechanically ventilated Acute Respiratory Distress Syndrome (ARDS) patients, is to compare two positive end-expiratory pressure (PEEP) titration techniques regarding: respiratory mechanics, gas exchange, changes in aeration, ventilation/perfusion matching its impact on cardiac function, especially the right heart (RH). The PEEP titration techniques are: PEEP selection based on low PEEP/high FiO2 table ("PEEPARDSnet") and lung recruitment maneuver (LRM) plus PEEPdec titration based on the best compliance of the respiratory system("PEEPLRM").
The pulmonary vasculopathy and right heart dysfunction in COPD are drawing increasing attention these days. Recent researches show that pulmonary vasculopathy and right heart dysfunction relate to greater severity in COPD. Applying appropriate modalities for early detection of pulmonary vasculopathy and right heart dysfunction is of great importance. What's more, the interaction mechanism between pulmonary vasculature, right heart and COPD still needs to be further studied. The aim of our study is to develop an assessment system of pulmonary vasculopathy and right heart dysfunction in COPD patients and elucidate their impact on COPD course and outcome.
The aim of this registry will be to compare the pathophysiological response of the morphology and function of the right heart and pulmonary circulation assessed with resting and stress-echocardiography in patients with various cardiovascular diseases, to compare them to healthy individuals. The physiological response in healthy individuals as well as elite athletes, defined as athletes participating at national and international competitions, will also be evaluated. Patients will be enrolled both prospectively as well as retrospectively and the will be evaluated by resting and stress echocardiography, which are part of the routine clinical practice. All clinical outcome measures will be collected as part of routine examinations. The measurements will include systolic and diastolic pump function of the right and left ventricles and other echocardiographic parameters. Moreover, a comparison of these parameters among different groups will be performed. Other optional assessments will include: exercise capacity assessed with 6-minute walking distance, World Health Organization functional class (WHO functional class), peak oxygen uptake assessed by spiroergometry. Patients will be evaluated at baseline and each year with the aforementioned procedures according to the sites clinical routine.
The investigator hypothesize that High Spinal Anesthesia (HSA) by its effect on attenuation of stress response, decrease in pulmonary vascular resistance, myocardial protection and positive myocardial oxygen balance will cause improvement in right ventricular function. So far there is no study that has evaluated the effect of HSA anesthesia on the right ventricular function, hence the investigator planned this study to compare the effect of HSA on the right ventricular function in patients with mitral valve disease with moderate to severe pulmonary hypertension planned for mitral valve replacement surgery.
This is an observational study to evaluate the role of a Bed side Focus assessed Transthoracic Echocardiography (FATE) in identifying the patients at a potential risk of developing hypotension secondary to general anesthesia induction using the FATE parameters like velocity time integral ( VTI ), Inferior venacava diameter , Caval index and Left ventricular end end diastolic area.
Background: The wearable cardioverter defibrillator (WCD) is an established treatment option for patients at high risk for ventricular tachycardia / ventricular fibrillation (VT/VF), either in whom this risk may only be temporarily present, or in patients at high risk for sudden cardiac death (SCD) or after VT/VF in whom an implantable cardioverter defibrillator (ICD is currently not possible for other reasons (infection, recent MI <40days, recent PCI/CABG < 3months etc.). Methods: Comprehensive registry including all patients in Austria who received a WCD in 2010-2016.
This study aims to analyze effects of three types of cardiac rehabilitation protocol on fuctional capacity, inflammatory markers, pulmonary function and clinical outcomes after coronary artery bypass grafting (CABG) in patients with left ventricular disfunction. Patients will be randomized and allocated in three groups according to type of exercise protocol: 1. walk; 2. cycle; 3. functional electrical stimulation.
To compare the calculated biventricular ejection fraction from cadmium-zinc-telluride (CZT) single photon emission computed tomography (SPECT) with planar equilibrium radionuclide angiography (ERNA), first-pass radionuclide ventriculography (FP-RNV) and echocardiogram.