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The CRT-KIR Study (Cardiac Resynchronization Therapy [CRT] in the Early Phase After Heart Surgery)

This study has been withdrawn prior to enrollment.
(The study population is smaller than expected. No subjects were included.)
Information provided by:
Rigshospitalet, Denmark Identifier:
First received: September 11, 2005
Last updated: July 9, 2007
Last verified: February 2006

In patients with broad QRS complexes on electrocardiogram (ECG), the delayed electrical activation of the left heart chamber will cause abnormal contraction.This has been shown to be possible to treat by a special pacemaker treatment which includes pacing of the left heart chamber (= CRT treatment).

In this study the researchers will investigate the effect of acute CRT treatment in the early phase after open heart surgery.

Condition Intervention
Bundle-Branch Block Procedure: Temporary cardiac resynchronization therapy

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Cardiac Resynchronization Therapy (CRT) in the Early Phase After Heart Surgery

Resource links provided by NLM:

Further study details as provided by Rigshospitalet, Denmark:

Primary Outcome Measures:
  • Non invasive cardiac output after 72 hours CRT (versus control) treatment

Secondary Outcome Measures:
  • Echocardiographic measures of left ventricular (LV) function
  • Mixed venous oxygen saturation
  • Invasively determined cardiac output
  • Plasma brain natriuretic peptide (p-BNP)
  • Number of hours with inotropic treatment

Estimated Enrollment: 60
Estimated Study Completion Date: September 2008
Detailed Description:

Patients with bundle branch block have a delayed electrical activation of the left ventricle causing abnormal contractility of the left ventricle.

We hypothesize that patients may benefit from short term (= 72 hours) CRT (Cardiac Resynchronization Therapy) in the early phase after open heart surgery.

Patients: reduced LV function and bundle branch block.

Study type: randomisation to CRT versus standard postoperative treatment

Study variables: cardiac output, echocardiographic measures, p-BNP and hours with inotropic therapy.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patient scheduled for open heart surgery (coronary artery bypass graft [CABG] or mitral valve surgery or aortic valve surgery or combinations of the above mentioned surgical procedures) and LV ejection fraction < 35% and bundle branch block (QRS > 9.12 s)

Exclusion Criteria:

  • Severe right heart failure
  • Permanent atrial fibrillation
  • Congenital heart disease
  • Serious non-cardiac disease
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00192946

Sponsors and Collaborators
Rigshospitalet, Denmark
Principal Investigator: Jesper H Svendsen, MD Rigshospitalet, Denmark
  More Information Identifier: NCT00192946     History of Changes
Other Study ID Numbers: KF 01-230/04
Study First Received: September 11, 2005
Last Updated: July 9, 2007

Keywords provided by Rigshospitalet, Denmark:
Cardiac resynchronization
Heart failure
open heart surgery

Additional relevant MeSH terms:
Bundle-Branch Block
Heart Block
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Pathologic Processes processed this record on August 18, 2017