Can Dipyridamole Induce Protection Against Ischemia and Reperfusion Injury in Patients Undergoing Elective Coronary Artery Bypass Grafting (CABG)?

Phase 4

Completed

• Conditions: Cardiovascular Disease; Ischemic Heart Disease
• Interventions: Drug: placebo; Drug: Dipyridamole

• Registration Number: NCT01295567
• Lead Sponsor: Radboud University Medical Center

Brief Summary

Rationale:

Due to western lifestyle human coronary arteries are prone to develop atherosclerotic plaques. Hence the heart is an important target organ for atherothrombotic complications: myocardial ischemia, arrhythmias, myocardial infarction and heart failure. To alleviate symptoms and decrease mortality in these patients, myocardial revascularisation is recommended. Coronary artery bypass grafting (CABG) is indicated in patients with severe atherosclerotic disease of all three coronary arteries or the left main stem coronary artery. Cardiac ischemia and reperfusion injury during CABG is inevitable and jointly accountable for complications that occur after CABG (e.g. death, myocardial infarction, arrhythmias, stroke, or renal complications). Dipyridamole has been shown to reduce ischemia reperfusion injury in healthy volunteers using an intermediate endpoint and may prevent cardiovascular death or event in secondary prevention after cerebrovascular disease. The investigators hypothesise that oral pre-treatment with dipyridamole can increase cardiac tissue tolerance against ischemia and reperfusion injury due to CABG. The investigators expect lower troponin-I release in patients who were pretreated with dipyridamole.

Objective: To study the effect of oral pretreatment with dipyridamole on high sensitivity (HS)-troponin-I release after CABG. Secondary objectives are whether oral pretreatment with dipyridamole reduces postoperative CABG arrhythmias, prolonged inotropic support, and duration of Intensive Care-stay. Further secondary endpoints are the effects of dipyridamole pretreatment on renal injury and post-ischemic recovery of contractile function (measured ex-vivo).

Hypothesis:

The investigators hypothesize that oral pre-treatment with dipyridamole can increase cardiac tissue tolerance against ischemia and reperfusion injury. The investigators expect lower HS-troponin-I release in patients who were pretreated with dipyridamole. Additionally the investigators expect the incidence of arrhythmias, need for prolonged inotropic support (longer than 24 hours postoperative) to be decreased in pretreated patients.

Detailed Description

Not available

Study Timeline

• Study Start: 2009-12
• Study First Submitted: 2011-02-01
• Study First Submitted QC: 2011-02-11
• Study First Posted: 2011-02-14
• Primary Completion: 2012-02
• Study Completion: 2012-09
• Status Verified: 2013-01
• Last Update Submitted: 2013-01-08
• Last Update Posted: 2013-01-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 95

Inclusion Criteria

• Acceptation for CABG in RUNMC
• Informed consent

Exclusion Criteria

• Recent myocardial infarction (STEMI or non-STEMI), during two weeks prior to inclusion
• Asthma
• Use of insulin
• Use of sulfonylurea derivates (e.g. glibenclamide, tolbutamide, gliclazide, glimepiride)
• Use of metformin
• Use of oral corticosteroids
• Use of dipyridamole
• Use of clopidogrel within 8 days prior to scheduled CABG surgery
• Chronic use of Non Steroid Anti-Inflammatory Drugs (NSAIDs)
• Off-pump surgery

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
placebo	placebo	-
dipyridamole	Dipyridamole	-

Primary Outcome Measures

Name	Time	Method
HS-troponin-I	within 72 hours after CABG.	high sensitivity cardiac troponin-I

Secondary Outcome Measures

Name	Time	Method
duration of IC stay	within three days after CABG
duration of inotropic support	within three days after CABG
drain production	24 hours after surgery and total drain production within three days after surgery	thoracic drain production after CABG
post-ischemic recovery of contractile function	until 4 hours after harvesting	The right atrial appendage is harvested during cardiac surgery before the introduction of the extracorporal circulation. Two atrial trabeculae are dissected, suspended in an organ bath, and linked to a force transducer. after equilibration and baseline measurement, simulated ischemia and reperfusion influences contractile force recovery
Renal damage	Within three days after CABG	biomarkers for renal failure will be detemined in blood and urine before and after CABG

Trial Locations

Locations (1)

RUNMC; 🇳🇱 Nijmegen, Netherlands