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Title: Impaired myocardial tissue perfusion early after successful thrombolysis - impact on myocardial flow, metabolism, and function at late follow-up
Authors: Maes, Alex ×
Van de Werf, Frans
Nuyts, Johan
Bormans, Guy
Desmet, Walter
Mortelmans, Luc #
Issue Date: Oct-1995
Series Title: Circulation vol:92 issue:8 pages:2072-2078
Abstract: BACKGROUND: Impaired tissue reperfusion after successful recanalization of an epicardial coronary artery has been documented both in animals and in patients with acute myocardial infarction. Whether this phenomenon can be demonstrated with positron emission tomography (PET) and whether it has an effect on late recovery of flow, metabolism, and function are unknown. METHODS AND RESULTS: Thirty patients with an acute myocardial infarction and TIMI flow grade 3 of the infarcted vessel at 90 minutes after thrombolytic therapy were studied. Within 24 hours after thrombolysis, at 5 days and at 3 months, myocardial blood flow was measured with 13NH3. 18FDG uptake was measured at 5 days. Radionuclide left ventricular angiograms were acquired at 5 days and at 3 months. In 11 patients (37%), regional myocardial flow was severely impaired (< 50% of normally perfused myocardium) despite successful thrombolysis. No recovery of left ventricular function occurred in any of these patients at 3 months. In 12 patients (40%), intermediate flows (50% to 75% of normal) were found, with functional improvement after angioplasty only in regions with a PET mismatch. Seven patients (23%) had high flow values early after successful thrombolysis (> 75% of normal) and showed preserved regional contractile function at 3 months. CONCLUSIONS: This study is the first demonstration with PET of impaired myocardial tissue perfusion in patients with an acute myocardial infarction after successful thrombolysis. Functional recovery of the reperfused myocardium is observed only when adequate tissue flow is restored. PET may be helpful in selecting patients in whom additional revascularization can improve recovery of left ventricular function.
URI: 
ISSN: 0009-7322
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear Medicine & Molecular Imaging
Cardiology
Radiopharmacy
Production Engineering, Machine Design and Automation (PMA) Section
× corresponding author
# (joint) last author

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