Noninvasive Cardiac Output Measurements in Patients With Pulmonary Hypertension Undergoing Exercise Testing
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|ClinicalTrials.gov Identifier: NCT01275703|
Recruitment Status : Withdrawn (The PI left this institution, and the study was closed.)
First Posted : January 12, 2011
Last Update Posted : December 23, 2015
Subjects in this study have been diagnosed with pulmonary hypertension and their doctors have referred them for an exercise test as part of their normal, routine care. The exercise test will either be a treadmill test or a 6 minute walk test. During a treadmill test, a patient typically walks on a treadmill while their heart is monitored using an electrocardiogram, which records the electrical activity of the heart through 10 small electrode patches attached to the skin of the chest, arms and legs. Additionally, heart rate and blood pressure are monitored throughout the test. A 6-Minute Walk test requires patients to walk for up to 6 minutes to determine how far they can go in order to measure the heart function related to exercise.
The purpose of this study is to measure internal heart pressures using a device called Noninvasive Cardiac Output Monitoring (NICOM) during an exercise test. Normally heart pressures are measured during invasive (meaning that doctors have to go inside the body using a needle or surgery) heart procedures. The NICOM device is non-invasive which means the investigators do not have to go inside the body to obtain the heart pressure measurements. In this study, the investigators will evaluate the non-invasive measurements provided by the NICOM device during the exercise test and see how it relates to information from some of subjects' past heart procedures. This research is being done to devise better, less invasive ways to assess disease severity, track disease progression and evaluate response to therapy.
The NICOM device is approved by the US Food and Drug Administration (FDA) to measure heart pressures. This device is usually used when a patient can't undergo a right heart catheterization. In this study, the investigators are using the device to gather heart pressure measurements for research during the exercise test that is scheduled as part of the subjects' normal, routine care. The research data is being used to devise better, less invasive ways to assess disease severity, track disease progression and evaluate response to therapy. The NICOM device is made by Cheetah Medical.
|Condition or disease|
|Study Type :||Observational|
|Actual Enrollment :||0 participants|
|Official Title:||Noninvasive Cardiac Output Measurements in Patients With Pulmonary Hypertension Undergoing Exercise Testing|
|Study Start Date :||May 2010|
|Actual Primary Completion Date :||November 2015|
|Actual Study Completion Date :||November 2015|
|patients with PH undergoing exercise testing|
- To determine the utility of a noninvasive method of measuring cardiac output during exercise testing in patients with pulmonary hypertension [ Time Frame: 2 years ]
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01275703
|United States, Illinois|
|University of Chicago|
|Chicago, Illinois, United States, 60637|
|Principal Investigator:||Stephen Archer, MD||University of Chicago|