Myocardial delayed enhancement using a single dose (0.1 mmol/kg) of gadobenate dimeglumine: contrast resolution versus intraventricular blood and viable myocardium

Radiol Med. 2010 Aug;115(5):693-701. doi: 10.1007/s11547-010-0495-2. Epub 2010 Mar 9.
[Article in English, Italian]

Abstract

Purpose: This study was done to estimate delayed enhancement (DE) contrast resolution of infarcted myocardium (IM) relative to intraventricular blood (IB) and viable myocardium (VM) using gadobenate dimeglumine (Gd-BOPTA).

Materials and methods: After approval from the Ethics Committee, we retrospectively evaluated 21 consecutive patients (61+/-10 years) with a healed myocardial infarction who underwent 1.5-T magnetic resonance (MR) imaging using an inversion-recovery-prepared turbo gradient-echo sequence 10 minutes after injection of 0.1 mmol/kg of Gd-BOPTA. Signal intensity (SI) was measured in arbitrary units (au) for IM, IB, VM, and outside the patient. Contrast-to-noise ratio (CNR) was calculated for IM to IB and IM to VM. Seven consecutive patients (59+/-6 years) with a healed myocardial infarction studied with similar technique but with 0.1 mmol/kg of gadoterate meglumine (Gd-DOTA) served as the control group. The Mann-Whitney U test was used to compare groups.

Results: Mean SI of IM was 44+/-16 au for Gd-BOPTA and 20+/-6 au for Gd-DOTA (p<0.001), that of IB 35+/-15 au and 14+/-5 au (p=0.016), and that of VM 7+/-3 au and 5+/-2 au (p=0.116), respectively. Mean IM to IB CNR was 10+/-7 for Gd-BOPTA and 8+/-5 for Gd-DOTA (p=0.836), that of IM to VM was 45+/-27 and 18+/-6, respectively (p=0.012).

Conclusions: Gd-BOPTA at 0.1 mmol/kg produced a higher myocardial DE and an IM to VM CNR than a single dose of Gd-DOTA. No significant difference was observed for IM to IB CNR.

MeSH terms

  • Contrast Media / administration & dosage*
  • Female
  • Heterocyclic Compounds / administration & dosage*
  • Humans
  • Image Interpretation, Computer-Assisted
  • Magnetic Resonance Imaging / methods*
  • Male
  • Meglumine / administration & dosage
  • Meglumine / analogs & derivatives*
  • Middle Aged
  • Myocardial Infarction / pathology*
  • Organometallic Compounds / administration & dosage*
  • Retrospective Studies
  • Statistics, Nonparametric

Substances

  • Contrast Media
  • Heterocyclic Compounds
  • Organometallic Compounds
  • gadobenic acid
  • Meglumine
  • gadolinium 1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetate