Dextran Use for Primary Angioplasty Protection in Acute Myocardial Infarction

NCT ID: NCT03148834

Last Updated: 2017-05-11

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

100 participants

Study Classification

INTERVENTIONAL

Study Start Date

2017-06-01

Study Completion Date

2019-07-01

Brief Summary

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Reperfusion therapy in acute myocardial infarction saves viable myocardium, but paradoxically reestablishment of coronary artery flow also induces damage and cell death, decreasing the full benefit of reperfusion in terms of reduction of infarct size and preservation of ventricular function . Myocardial reperfusion can in itself produce more damage and cell death, this process defines the phenomenon of reperfusion injury, which could be prevented by applying additional therapies.

Detailed Description

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During myocardial ischemia, due to lack of O2, the myocyte leaves energy production from the aerobic metabolism of lipids and the production of energy in the form of phosphates will depend, in this situation, on the anaerobic metabolism of glucose. As a result they are consumed muscle glycogen stores that produce little ATP, and also generating acidosis. The cell membrane loses its ability to maintain the fluid's electrolyte balance. Cellular edema is generated by the entry of sodium and water, leading to cell rupture. During ischemia and reperfusion free radicals are produced that stimulate inflammation and consequently release prothrombotic and cytotoxic substances that also produce cellular damage. Due to its osmotic, antithrombotic, anti-inflammatory and rheological effects, dextran could be useful in this scenario.

The administration of a solution in the distal bed, for the protection of the myocardium, before opening the epicardial artery is called by us "controlled reperfusion". The researchers think, using a solution with venous blood, containing less O2 but retaining buffer properties; enriched with Dextran, which has onctic power, anti-inflammatory and anticoagulant properties, and molecules similar to glucose; results in a potentially useful solution for myocardial protection in this scenario.

The group of investigators expect that controlled reperfusion treatment will reduce the incidence of ST correction and infarct size by 20-30%, improving the prognosis in terms of mortality and heart failure.

Conditions

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Acute Myocardial Infarction With ST Elevation

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Control Reperfusion Primary Angioplasty

Patients admitted with acute myocardial infarction and TIMI flow 0/1, will be treated with the use of an intracoronary venous blood solution and dextran to protect the myocardium during reperfusion.

Group Type EXPERIMENTAL

Controlled Reperfusion

Intervention Type PROCEDURE

Patients will be treated in the occluded coronary with a solution of venous blood and Dextran, prior to the Stenting procedure.

Controlled Reperfusion PCI consists of crossing the culprit lesion with guidewire and then advancing a balloon (over the wire) to the distal segment of the culprit vessel. Proximal to the main distal branch, inflate the balloon to low atmospheres, remove the guide wire and inject the solution through the light of the balloon. Then reposition the guidewire, perform angioplasty as usual on the lesion. If there is a large residual thrombus load and at the operator's discretion, change the balloon by a manual thromboaspiration catheter and use it.

Then perform stenting of the lesion. The solution will be given with a 1 cc syringe as a slow bolus, controlling symptoms and ST segment response.

The compounds in solution are venous blood drawn from the patient after administration of heparin and mixed with dextran in a 3/1 ratio.

Standard Primary Coronary Angioplasty

Patients admitted with an acute myocardial infarction and TIMI flow 0/1, will be treated with primary angioplasty according to norms described in the international guidelines of treatment.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Controlled Reperfusion

Patients will be treated in the occluded coronary with a solution of venous blood and Dextran, prior to the Stenting procedure.

Controlled Reperfusion PCI consists of crossing the culprit lesion with guidewire and then advancing a balloon (over the wire) to the distal segment of the culprit vessel. Proximal to the main distal branch, inflate the balloon to low atmospheres, remove the guide wire and inject the solution through the light of the balloon. Then reposition the guidewire, perform angioplasty as usual on the lesion. If there is a large residual thrombus load and at the operator's discretion, change the balloon by a manual thromboaspiration catheter and use it.

Then perform stenting of the lesion. The solution will be given with a 1 cc syringe as a slow bolus, controlling symptoms and ST segment response.

The compounds in solution are venous blood drawn from the patient after administration of heparin and mixed with dextran in a 3/1 ratio.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Women and men over 18 years of age
* First acute myocardial infarction with ST elevation, within 6 hours of the initial symptoms, that are admitted for primary PCI at the Hospital San Bernardo.
* TIMI 0 or 1 flow in the culprit artery.

Exclusion Criteria

* Not able or willing to give informed consent.
* Participate in another protocol.
* Pregnancy.
* History of any of the diseases listed: cardiomyopathy, valvular disease severe, any disease with a life expectancy of less than 1 year.
* Contraindication for protocol drugs (Dextran).
* LBBB or pacemaker.
* Prolonged cardiopulmonary resuscitation.
* Cardiogenic shock.
* Left main coronary lesion or culprit lesion in venous graft.
* Large artery not feasible for PCI, guilty vessel of small caliber or very distal lesion.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Centro Cardiovascular Salta

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Central Contacts

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Alejandro Farah, MD

Role: CONTACT

+543874534929

Ricardo A Leon de la Fuente, MD

Role: CONTACT

+543874034979

References

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Other Identifiers

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052017

Identifier Type: -

Identifier Source: org_study_id

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