View clinical trials related to Cardiac Output.
Filter by:The goal of this observational study was to better understand the impact of increased plasma volume on later exercise in hypoxia. Investigators examined young, healthy, males who regularly participated in aerobic exercise. Investigators first measured participant's response to exercise in hypoxia (simulated ~7,500 feet above sea level). The investigators then had participants either 1) undergo 1 bout of high intensity interval exercise or 2) undergo 1 bout of moderate, continuous exercise. 48 hours after the exercise, participants were again examined in hypoxia.
To monitor the cardiac post-op patient population with both the pulmonary artery catheter (PAC) and the Caretaker monitor, which will seek to validate the Caretaker monitor against continuous CO via the PAC. Up to a third of post-operative cardiac surgery patients develop cardiac arrhythmias such as atrial flutter and atrial fibrillation. Secondary analysis will be performed on the collected data to assess the Caretaker monitor's agreement with the PAC during periods of arrhythmia. Successful completion this study will provide clinical validation of the Caretaker monitor in one of the most hemodynamically challenging patient populations (post-cardiac surgery patients in the ICU), including during arrhythmias. The Caretaker monitor is most beneficial as it is non-invasive, is a minimal risk device, and for this protocol will not be utilized to make treatment decisions for the study subject. This device also does not project energy into the subject.
The use of cardiac output monitoring to guide intraoperative fluid management and inotropic drugs as part of a hemodynamic therapy algorithm reduce the complication rate in major abdominal surgery. The FloTrac/Vigileo system (© Edwards Lifesciences) (Edwards Lifesciences, Irvine, CA) device estimate cardiac output by using arterial pulse contour analysis. The accuracy of FloTrac/Vigileo have been proven in patients with normal cardiac index. Most of studies regarding FloTrac/Vigileo were performed in patients in horizontal supine position, which is not usually the reality in the operation theater during abdominal surgery. Therefore, the investigators realized this monocentric prospective clinical trial to study the accuracy and trending ability of the fourth generation FloTrac/Vigileo system cardiac output estimation in three different positions (horizontal supine, Trendelenburg and reverse Trendelenburg positions) in anesthetized patients undergoing elective major abdominal surgery. The reference method of cardiac output measurement used was the transesophageal echocardiography.
The objective of this study is to investigate the hemodynamic effects of two strategies of alveolar recruitment maneuver in patients undergoing major abdominal surgery in the operating room
Cardiac output will be measured in healthy parturients undergoing cesarean delivery under spinal anesthesia
Comparison studies comparing hemodynamic parameters provided by the Caretaker against respective Gold Standard references.
In this study, the investigators sought to clarify the influence of FIO2 levels on the variables in the Fick equation and then assessed the influence of each variable on the accuracy of Fick-CO measurements in patients undergoing cardiac surgery.
In pregnant term patients, we intent to use a non invasive cardiac output monitor to detect the changes in cardiac output as the patient is being placed in different positions. The patient will be placed on her back, flat, and in left lateral tilt at two different angles. Measurements of cardiac output will be recorded.
Background It is known from previous research that in patients with complete AV (atrioventricular) block and pacemaker stimulation stroke volume and cardiac output are higher with AV-synchronous than with AV-dyssynchronous pacing. However, the extent to which patients profited from AV-synchronous stimulation varied substantially. Aim of the study Aim of this study is to systematically analyze the impact of diastolic function and other echo parameters on the difference of stroke volumes/cardiac output between AV-synchronous and AV-dyssynchronous pacing modes. Methods Patients fulfilling the entry criteria will be enrolled (two-chamber pacemaker of any vendor eligible) in this monocentric, prospective, interventional study. Baseline data will be collected with a standardized questionnaire. During an echo examination, parameters of diastolic, systolic and atrial function will be assessed. Then, the stroke volume/cardiac output will be measured twice in each patient, once with AV-synchronous and once with AV-dyssynchronous pacing. Therefore, each patient will represent their own control. It will be randomized (coin tossing) which stimulation mode is first and which is second (sonographer and patient will be blinded). Descriptive statistics will be applied and regression models will be fitted to explore the data.
This study investigates cardiac output in young children under 18 months of age during the perioperative period by means of electrical cardiometry.