View clinical trials related to Cardiac Output Measurement.
Filter by:Fatigue and dyspnea that reduce exercise performance are common symptoms in patients with hypertrophic cardiomyopathy. Since the cause of this functional limitation has not yet been described, this study aims to evaluate the cardiopulmonary parameters measured at cardiopulmonary exercise test in combination with those obtained by non-invasive measurement of cardiac output by impedance (Physioflow) and echocardiography. These results will help to better define the mechanisms underlying limitation in these patients, also in relation to the degree of LVOT obstruction. The aim of the present study is to assess the cardiopulmonary response to exercise in patients with hypertrophic cardiomyopathy, based on the degree of LVOT obstruction, by adding non-invasive measurement of cardiac output by Physioflow and echocardiographic parameters to the cardiopulmonary exercise test parameters associated with stroke volume and cardiac output (ie. VO2/WR, O2pulse) Consecutive patients with a previous diagnosis of hypertrophic cardiomyopathy on optimised medical therapy will be enrolled to perform a cardiopulmonary exercise test with simultaneous measurement of cardiac output and an exercise echocardiogram for clinical routine.
In high-risk patients, it is now recommended to guide the intraoperative volume replacement via the stroke volume. Today, the most commonly used technique for estimating the stroke volume is the transpulmonary thermodilution and the arterial waveform analysis in the radial artery by PICCO®. This technique has the disadvantage of being invasive and increasing the time dedicated to anesthesia during the surgery. The future is the non-invasive monitoring of stroke volume. Thus, Edwards Life Science has developed a continuous monitoring technology and non-invasive arterial pressure, cardiac output and stroke volume using a digital sensor (ClearSight®). This continuous monitoring of blood pressure was validated in cardiothoracic surgery but studies about monitoring cardiac output or stroke volume are inconclusive and contradictory. The objective of this study is to compare the use of non-invasive monitoring of stroke volume by ClearSight® with the transpulmonary thermodilution and the arterial waveform analysis in radial artery by PICCO® in abdominal major surgery.
In high-risk patients, it is now recommended to guide the intraoperative volume replacement via the stroke volume. Today, the most commonly used technique for estimating the stroke volume is the arterial waveform analysis in the radial artery. This technique has the disadvantage of being invasive and increasing the time dedicated to anesthesia during the surgery. The future is the non-invasive monitoring of stroke volume. Thus, Edwards Life Science has developed a continuous monitoring technology and non-invasive arterial pressure, cardiac output and stroke volume using a digital sensor (ClearSight®). The continuous monitoring of blood pressure by this technique was validated in cardiothoracic surgery but studies about monitoring cardiac output or stroke volume are inconclusive and contradictory. The objective of this study is to compare the use of non-invasive monitoring of stroke volume by Clearsight® with the arterial waveform analysis in the radial artery by Pulsioflex® in major surgery.
Recently, an uncalibrated minimally invasive Pulse-code Modulator (PCM) has been developed: the MostCare system. This monitoring system is powered by Pressure Recording Analytical Method (PRAM), which is based on the mathematical analysis of the arterial pressure profile changes. It allows beat-to-beat Stroke Volume (SV) assessment from the pressure signal recorded invasively in radial, brachial, or femoral arteries. The most innovative features of this method are: 1) the lack of a calibration requirement, 2) the analysis of the arterial wave signal is performed at 1000 Hz, 3) a dedicated arterial catheter-transducer is unnecessary. MostCare is powered by PRAM (Pressure Recording Analytical Method) algorithm. The investigators primary end-point was to evaluate the relationship between Cardiac Output (CO) measured by MostCare with CO calculated with Echo-Doppler in Intensive Care Unit (ICU) patients under different clinical conditions. As a secondary end-point the investigators evaluated the relationship between CO measured by MostCare with CO obtained with thermodilution techniques (standard bolus thermodilution or transpulmonary thermodilution, i.e. PiCCO system). This is a prospective multicentre observational study.