Working… Menu

Chest CT With Iterative Reconstruction as an Alternative to Conventional Chest X-ray Prior to Heart Surgery (CRICKET)

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: NCT02173470
Recruitment Status : Terminated (Expected futility in reaching the primary endpoint)
First Posted : June 25, 2014
Last Update Posted : June 11, 2020
ZonMw: The Netherlands Organisation for Health Research and Development
Information provided by (Responsible Party):
Annemarie den Harder, UMC Utrecht

Brief Summary:
To assess if information about aortic calcification obtained from routine preoperative ultra low-dose chest CT lowers the postoperative stroke rate in patients undergoing heart surgery by optimizing surgical strategy compared to the normal work-up with a conventional chest X-ray.

Condition or disease Intervention/treatment Phase
Cardiac Defects Disorder; Heart, Functional, Postoperative, Cardiac Surgery Stroke Other: CT scan Not Applicable

Detailed Description:

During heart surgery the aorta is clamped to initiate cardiopulmonary bypass. This may crush aortic calcifications causing them to embolize to the brain causing a stroke which is a devastating complication for the patient. A chest X-ray is routinely performed prior to heart surgery. It provides no information about aortic calcification. Imaging by a chest computed tomography (CT) scan provides detailed information on aortic calcification but has higher radiation exposure and thus is not used routinely. Recently iterative reconstruction (IR) techniques have become available that allow chest CT to be performed at markedly reduced dose with retained image quality. Routine use of low dose chest CT with IR prior to heart surgery may identify patients with a severely calcified aorta in which the surgery may subsequently adapted to minimize or avoid aortic manipulation which may reduce stroke rate.

In this multicenter randomized controlled clinical trial the effect of preoperative chest CT on postoperative stroke is investigated. In total 1724 patients will be included of whom 862 patients will receive an additional CT to standard care and 862 patients will receive routine care.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 866 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Ultra Low-dose Chest CT With Iterative Reconstructions as an Alternative to Conventional Chest X-ray Prior to Heart Surgery
Actual Study Start Date : September 2014
Actual Primary Completion Date : October 2019
Actual Study Completion Date : June 2020

Resource links provided by the National Library of Medicine

Drug Information available for: X-Rays

Arm Intervention/treatment
No Intervention: Control
Routine clinical care (which includes a conventional chest X-ray).
Experimental: CT scan
Routine clinical care, which includes a chest x-ray, with an additional ultra low-dose non contrast enhanced chest CT with IR (performed preoperatively).
Other: CT scan
The intervention group receives both standard care (chest x-ray) and an ultra low dose CT thorax without contrast.
Other Name: computed tomography

Primary Outcome Measures :
  1. Postoperative stroke [ Time Frame: Participants will be followed for the duration of hospital stay, an expected average of 5 days ]
    Percentage of patients suffering from in-hospital postoperative stroke (central neurological defect that either recovers spontaneously or is permanent) after heart surgery.

Secondary Outcome Measures :
  1. Altered surgical approach [ Time Frame: The surgery will take place the day after hospital administration. ]
    Percentage of patients in which the surgical approach is altered based on information derived from the preoperative chest CT.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • 18 years old or older
  • Scheduled to undergo heart surgery
  • Provide written informed consent

Exclusion Criteria:

  • Patient not meeting inclusion criteria
  • Pregnant women
  • Scheduled to undergo transcatheter aortic valve insertion procedure (since these patients receive a standard preoperative CT)
  • Chest or cardiac CT in the past three months
  • Emergency surgery
  • Concomitant or previous participation in a study that prohibits the patient from participating in a study that exposed the patient to radiation
  • Unwillingness to be informed about unrequested findings on the CT scan

Information from the National Library of Medicine

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 identifier (NCT number): NCT02173470

Layout table for location information
Heart and Vascular Center Semmelweis University
Budapest, Hungary
Erasmus Medical Center
Rotterdam, Netherlands
University Medical Center Utrecht
Utrecht, Netherlands, 3508GA
Sponsors and Collaborators
UMC Utrecht
ZonMw: The Netherlands Organisation for Health Research and Development
Layout table for investigator information
Principal Investigator: Ricardo PJ Budde, MD, PhD Erasmus MC Rotterdam
Study Data/Documents: Study Protocol  This link exits the site
Ultra low-dose chest ct with iterative reconstructions as an alternative to conventional chest x-ray prior to heart surgery (CRICKET study): Rationale and design of a multicenter randomized trial.

Layout table for additonal information
Responsible Party: Annemarie den Harder, MD, UMC Utrecht Identifier: NCT02173470    
Other Study ID Numbers: NL47293.041.13
837001403 ( Other Grant/Funding Number: ZonMw )
First Posted: June 25, 2014    Key Record Dates
Last Update Posted: June 11, 2020
Last Verified: June 2020