Relationship between strain rate imaging and coronary flow reserve in assessing myocardial viability after acute myocardial infarction

Seong-Mi Park, Soon Jun Hong, Jae Suk Park, Sang Yeob Lim, Chul Min Ahn, Do-Sun Lim, Wan Joo Shim

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9 Citations (Scopus)

Abstract

Objectives: To evaluate the relationship between strain rate (SR) imaging and coronary flow reserve (CFR) in assessing viability of akinetic myocardium after acute myocardial infarction (MI). Methods: Forty patients with acute first ST-elevation MI were analyzed. SR imaging and CFR by intracoronary flow measurement were obtained on the same day, 3∼5 days after primary percutaneous coronary intervention. Viability of the akinetic myocardium was determined on 6-week echocardiography. Results: Systolic SR (SRs, -0.42 ± 0.10 vs. -0.35 ± 0.11 per second, P = 0.03), early diastolic SR (SRe, 0.68 ± 0.31 vs. 0.41 ± 0.22 per second, P = 0.003), and systolic strain (Ss, -5.9 ± 3.4 vs. -2.5 ± 4.0%, P = 0.04) were greater in akinetic, but viable myocardium of 21 patients than in akinetic and nonviable myocardium of 19 patients. CFR was also higher in patients with akinetic, but viable myocardium (2.0 ± 0.5 vs. 1.5 ± 0.5, P < 0.001). SRs, SRe, and Ss were significantly related to CFR (r = -0.50, r = 0.58, r = -0.56, respectively, all P ≤ 0.001) and SRe was most related to CFR (P < 0.001). The sensitivity and specificity to predict myocardial viability were 85.7% and 68.4% for CFR (cutoff = 1.75), and 90.5% and 57.9% for SRe (cutoff = 0.37 per second), respectively. Conclusions: The degree of myocardial deformation determined by SR imaging was related to the degree of microvascular integrity determined by CFR, and can be used as a noninvasive method to predict myocardial viability after acute MI.

Original languageEnglish
Pages (from-to)977-984
Number of pages8
JournalEchocardiography
Volume27
Issue number8
DOIs
Publication statusPublished - 2010 Sep 1

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Keywords

  • coronary flow reserve
  • myocardial infarction
  • strain rate imaging
  • viability

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Radiology Nuclear Medicine and imaging

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