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Primary Angioplasty for Acute Myocardial Infarction in Patients With Symptom Duration Above 12 Hours

2014-08-27 03:47:23 | BioPortfolio

Summary

Background: Acute balloon angioplasty is beneficial in patients with acute myocardial infarction. However, presently this treatment is not offered to patients with symptom duration above 12 hours.

Hypothesis: Acute balloon angioplasty for myocardial infarction is beneficial despite symptom duration above 12 hours.

Methods: In 60 patients with myocardial infarction and symptom duration above 12 hours, the proportion of non-perfused myocardium before acute angioplasty and 1 month after angioplasty is compared to evaluate if myocardial tissue can be saved by acute angioplasty despite long symptom duration.

Description

Methods: On arrival at our angioplasty laboratory, patients are informed about the study. If they accept to participate, we infuse 600 MBq of Sestamibi i.v. This binds in a first passage fashion without later redistribution to perfused myocardium. Non-perfused myocardium does not bind sestamibi. Primary angioplasty with stent and abciximab is then performed followed by myocardial scintigraphy to illustrate the non-perfused myocardial area that was at risk of infarction before the coronary artery was opened. Echocardiography is also performed. At 1 month, myocardial scintigraphy is repeated to evaluate infarct size. The difference between the myocardial area at risk of infarction before angioplasty and the myocardial infarct size 1 month later is defined as "salvage". Scintigraphy is repeated at 6 month and echocardiography is also repeated at 1 month and 6 months. The primary endpoint is "salvage". Accordingly, the aim is to demonstrate that salvage can be achieved with primary angioplasty for acute myocardial infarction despite symptom duration above 12 hours. Clinical endpoints are death and reinfarction. The results are compared with results in 200 patients with symptom duration below 12 hours. These patients are treated and examined according to the exact same protocol. By this comparison, it can be evaluated whether it is relevant that the current guidelines recommend acute balloon angioplasty only to patients with less than 12 hours of symptom duration.

Study Design

Allocation: Non-Randomized, Control: Uncontrolled, Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Conditions

Acute Myocardial Infarction

Intervention

Primary angioplasty with stent and abciximab

Location

Departments of Cardiology and Nuclear Medicine at Skejby Hospital
Aarhus
Denmark
DK-8200 N

Status

Completed

Source

Skejby Hospital

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:47:23-0400

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Medical and Biotech [MESH] Definitions

MYOCARDIAL INFARCTION in which the anterior wall of the heart is involved. Anterior wall myocardial infarction is often caused by occlusion of the left anterior descending coronary artery. It can be categorized as anteroseptal or anterolateral wall myocardial infarction.

A myocardial infarction that does not produce elevations in the ST segments of the ELECTROCARDIOGRAM. ST segment elevation of the ECG is often used in determining the treatment protocol (see also ST Elevation Myocardial Infarction).

A clinical syndrome defined by MYOCARDIAL ISCHEMIA symptoms; persistent elevation in the ST segments of the ELECTROCARDIOGRAM; and release of BIOMARKERS of myocardial NECROSIS (e.g., elevated TROPONIN levels). ST segment elevation in the ECG is often used in determining the treatment protocol (see also NON-ST ELEVATION MYOCARDIAL INFARCTION).

An episode of MYOCARDIAL ISCHEMIA that generally lasts longer than a transient anginal episode but that does not usually result in MYOCARDIAL INFARCTION.

The new and thickened layer of scar tissue that forms on a PROSTHESIS, or as a result of vessel injury especially following ANGIOPLASTY or stent placement.

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