Data Collection During CT for Axial Flow VADs

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00427739
Recruitment Status : Completed
First Posted : January 29, 2007
Last Update Posted : March 31, 2017
Information provided by (Responsible Party):
Subha Raman, Ohio State University

January 25, 2007
January 29, 2007
March 31, 2017
June 2006
February 2009   (Final data collection date for primary outcome measure)
data collection to help determine better clinical evaluation [ Time Frame: ongoing ]
Flow, Power, Volts, Speed, Pulsatile Index, Cardiac Output, PA pressures, Heartrate and Central Venous Pressure
Complete list of historical versions of study NCT00427739 on Archive Site
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Data Collection During CT for Axial Flow VADs
Pilot Study of Data Collection During Computerized Tomography (CT) to Determine Accurate Flow Rates for Axial Flow Ventricular Assist Device (VAD) Patients

At present, there is not accurate way to determine specific flow rates for axial flow ventricular assist devices (VADS). If a right heart cath is needed for these patients for clinical purposes, they will also undergo a cardiac CT scan while the pulmonary artery catheter is in place. It is possible to visualize the flow rates of axial flow VAD's and determine a more accurate rate per specific patient.

Data Analyzed with following results:

Article in Press for Cardiopulmonary Support and Physiology, results state "Pairwise comparison of calculated output from left ventricular assist devices is feasible using first pass dynamic computed tomography test bolus technique versus thermodilution output measurements yielded good agreement (P=.03). The output calculated using dynamic CT underestimated the thermodilution output measurement by 0.54+ 0.37 L/min (95% confidence interval 0.66-0.94).

Description as listed in Summary. The hemodynamic data collected along with pump parameters may help determine more accurate flow rates specific to each patient.
Observational Model: Cohort
Time Perspective: Prospective
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Non-Probability Sample
Patients with implanted left ventricular assist devices referred for CT scans
Heart Failure
Procedure: Cardiac CT
64 slice spiral computerized tomography
CCT exam
Intervention: Procedure: Cardiac CT
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
February 2009
February 2009   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Signed Informed consent
Sexes Eligible for Study: All
18 Years and older   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
United States
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Subha Raman, Ohio State University
Subha Raman
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Principal Investigator: Benjamin Sun, MD Ohio State University, Division of Cardiothoracic Surgery
Ohio State University
March 2017