Potential of delayed gadolinium enhancement magnetic resonance imaging for quantification of reverse remodeling of the peri-infarct zone in patients with ischemic cardiomyopathy treated with chronic vasodilator therapy: initial experience.

Abstract:

PURPOSE:The peri-infarct zone represents the morphologic substrate for reentry ventricular tachycardia after myocardial infarction, and its extent is a strong predictor of major cardiac events. Although delayed gadolinium enhancement magnetic resonance imaging (DGE-MRI) was shown to allow for detailed characterization of myocardial infarction by quantifying infarct core zone and peri-infarct zone volume, potentials of DGE-MRI for measuring changes in peri-infarct zone volume are unknown. Therefore, we aimed to assess changes in volume of the peri-infarct zone among patients with ischemic cardiomyopathy treated with chronic vasodilator therapy. MATERIALS AND METHODS:Core and peri-infarct zone volumes as assessed with DGE-MRI were measured in 5 patients at baseline and after 6 months treatment with sustained-release dipyridamole. RESULTS:Core zone volume remained stable during follow-up [median (range), 19 mL (9 to 42) vs. 16 mL (11 to 46); P=0.785]. The ratio between the peri-infarct zone and the core zone volume decreased significantly at 6 months compared with baseline [median (range), 0.22 (0.19 to 0.42) vs. 0.18 (0.09 to 0.32); P=0.043], and a trend toward reduction in peri-infarct zone volume was found [median (range), 5 mL (2 to 8) vs. 3 mL (2 to 6); P=0.059]. The peri-infarct zone volume decreased in all but 1 patient over the follow-up. CONCLUSIONS:This initial experience suggests that reverse remodeling of the peri-infarct zone with reduction in peri-infarct zone volume may take place in patients with ischemic cardiomyopathy. Quantification of this process may be feasible with DGE-MRI, but further studies are needed to confirm this hypothesis and to further clarify the role of DGE-MRI for the assessment of changes in peri-infarct zone volume in patients with ischemic cardiomyopathy.

journal_name

J Thorac Imaging

authors

Muzzarelli S,Ordovas KG,Cannavale G,Naeger D,Michaels AD,Higgins CB

doi

10.1097/RTI.0b013e3182125fb8

subject

Has Abstract

pub_date

2012-03-01 00:00:00

pages

121-4

issue

2

eissn

0883-5993

issn

1536-0237

journal_volume

27

pub_type

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