View clinical trials related to Echocardiography.
Filter by:The aim of the study is to find out the benefit of echocardiography, which is performed by a physican without a cardiological or radiological specialty. In this case the echocardiography is used in the first contact with a patient with chest pain of unclear etiology. Possible benefit is rapid risk stratification of acute non-stemi coronary syndromes and differentiation from other serious conditions, such as pulmonary embolism or aortic dissection.
Cardiac output will be measured in healthy parturients undergoing cesarean delivery under spinal anesthesia
Background: Intraoperative hypotension increases 30-day mortality and the risks of myocardial injury and acute renal failure. Patients with inadequate volume reserve before the induction of anesthesia are highly exposed. The identification of latent hypovolemia is therefore crucial. Ultrasonographic measurement of the inferior vena cava collapsibility index (IVCCI) is able to detect volume responsiveness in circulatory shock and growing evidence support the theory that higher IVCCI can predict intraoperative hypotension. The aim of the present study is to evaluate the potential benefit of an ultrasound-based protocol for preoperative fluid optimization. The investigators will perform a randomized-controlled study involving elective surgical patients. An ultrasound-based protocol (USP) arm and a conventional fluid therapy group (CFT) are to be formed. Ultrasound examinations will be performed twice in both groups: 2 hours and 30 minutes preoperatively. The inferior vena cava and the anterior lung fields will be scanned. In the USP group the participants will receive fluid therapy according to the ultrasonographic findings: high level of IVCCI and absence of signs of pulmonary edema will indicate fluid therapy. In the CFT group the attending anesthesiologist (blinded to the results of ultrasonography) will order fluid therapy on the basis of daily routine and clinical judgement. The investigators will evaluate the incidence of intraoperative hypotension (primary outcome), postoperative metabolic status and organ functions and the amount of the administered intravenous fluids in both groups.
Hematopoietic stem cell transplantation is an important method for the treatment of hematological diseases and cyclophosphamide is a commonly used chemotherapeutic agent for transplant pretreatment. The incidence of severe cardiovascular events after high-dose cyclophosphamide exposure ranges from 7% to 28% with mortality from 11% to 43%. Thus, an non-invasive, sensitive and reliable method in detecting cardiac function is significant to balance the cardiac risk and the potential cancer treatment benefits. In previous studies, we demonstrated that strain values analyzed by speckle tracking echocardiography decreased significantly after high-dose cyclophosphamide exposure, even though left ventricular ejection fraction remained stable and within normal range. We follow up the hematopoietic cell transplantation patients with cyclophosphamide: to analyze the cut-off values of the parameters of speckle tracking multilayer analysis in predicting early cardiotoxicity induced by cyclophosphamide; to detect the cut-off values of the plasma miRNAs levels in predicting early cardiotoxicity induced by anthracycline. The purpose of our study is to find out non-invasive, reliable and sensitive echocardiographic parameters and plasma biomarkers for early detection and prediction cyclophosphamide -induced cardiac toxicity and to be helpful to target patients at high risk of cardiotoxicity, who could benefit from closer monitoring or earlier initiation of cardioprotective therapy.
Due to radiation exposure and low but real risk of morbidity and mortality associated with right heart catheterization, non-invasive procedures to estimate mPAP are desired for the diagnosis of PH or to monitor treatment effectiveness. Echocardiography is used as a screening tool to estimate systolic pulmonary arterial pressure (sPAP), but due various limitations, this technique is not considered to be sufficiently accurate for the diagnosis of PH. The aim of 4D flow MRI is to evaluate the complete time-varying tridirectional velocity field in a volume of interest. It enables flow and velocity measurements in a vascular region of interest and visualization of vector plots of blood flow velocity fields. Previous studies have shown on the one hand, correlations between mPAP and hemodynamic parameters obtained by phase contrast MRI and, on the other hand, appearance of a vortical blood flow in the pulmonary artery in PH. More studies are required to confirm 4D MRI as a valuable tool for mPAP estimation in PH. Following screening echocardiography, all patients will undergo right heart catheterization for PH assessment. Then, all patients will be referred for a complete cardiac MRI exam with the addition of a 4D Flow sequence (does not require supplementary injection of a contrast agent and does not extend the duration of the examination) followed promptly (within the same hour) by a Doppler-echocardiography. The data from each examination will be blindly interpreted from the results of the other one. No follow-up will be required for the study.
Over the past decade, aortic valve replacement surgery has undergone significant changes in terms of both the approaches and the prostheses used. In parallel with the historical biological prostheses for aortic valve surgery, a new generation of bioprostheses has been marketed since 2008, with the entry of these new prostheses in the armatorium of the Amiens-Picardy University Hospital since 2010. These are rapid deployment prostheses or prostheses without sutures. As a result, patients undergoing aortic valve replacement have been able to benefit from this type of bioprosthesis during their procedures. There are few publications reporting the 5-year follow-up of these bioprostheses. The investigators therefore decided to follow up patients operated on by a new generation bioprosthesis to study the 5-year survival and the functioning of their bioprostheses, in order to make a scientific contribution to the follow-up of these valves. These patients will be compared to patients who have benefited from the implantation of traditional bioprostheses.
This study will test a clinical reminder to show recent echocardiograms when a new echocardiogram is ordered. The goal is to avoid unnecessary comprehensive echocardiography.
Background: Acute dyspnoea is a common symptom in prehospital emergency medicine. As ultrasound gained in importance for diagnosis in patients with acute respiratory distress, it plays even a role in the prehospital setting. However, prehospital emergency ultrasound (PEU) remains challenging and requires knowledge and skills. New prehospital ultrasound devices offer the possibility for tele-supervision. The impact of tele-supervision of PEU in patients with acute dyspnoea is unclear. Objective: This prospective observational study aims to evaluate the effect of PEU with tele-supervision on diagnosis, treatment strategies and cognitive load in comparison to PEU without tele-supervision in patients with acute dyspnoea. Methods: In total 350 prehospital emergency patients with acute dyspnoea will be included in this study. Patients will be observed in two groups. In group 1 PEU will be performed with tele-supervision, whereas in group 2 PEU will be performed without tele-supervision (tele-supervision not available).
Background: Point-of-care ultrasound (POCUS) has been suggested as a useful tool in out-of-hospital cardiac arrest (OHCA) for diagnosis and treatment of reversible causes. However, in prehospital emergency medicine performing ultrasound and the translation of the findings can be challenging. As new prehospital ultrasound devices offer the possibility for remote supervision, the impact of tele-supervision on the performance of POCUS during OHCA is unclear. Aims: This prospective observational study aims to evaluate if POCUS with tele-supervision can be performed during CPR without any additional hands-off periods longer than 5 seconds. Methods: In total 30 patients with OHCA, where POCUS is considered, will be included in this study.
Background: Point-of-care ultrasound (POCUS) has been suggested as a useful tool in emergency medicine for diagnosis and treatment of reversible causes. However, in prehospital setting performing ultrasound and the translation of the findings can be challenging. As new prehospital ultrasound devices offer the possibility for remote supervision, the impact of tele-supervision on time to diagnosis of critically ill patients is unclear. Aims: The aim of this study is to evaluate the impact of tele-supervision on the time of POCUS in prehospital critically ill patients by air rescue physicians. Methods: In total 100 critically ill patients suffering from acute dyspnoea, circulatory failure or trauma, which are treated by air rescue physicians will be included in this study. Duration of ultrasound performance as well as altered treatment strategies will be analyzed.