Significance of T-wave changes during early dobutamine stress echocardiography in patients with Q-wave acute myocardial infarction

Francesco De Felice, Enrico Gostoli, Maurizio Russo, Alessandro Bonzano, Pierantonio Recanzone, Claudio Moretti, Francesco Pinneri, Giorgio Borello

Research output: Contribution to journalArticlepeer-review

Abstract

The relation between T-wave changes and regional contraction during dobutamine stress echocardiography at low (5 to 10 μg/kg/min) and high (20 to 40 μg/kg/min) doses in 43 consecutive patients, early (7 ± 2 days) after first recent Q-wave acute myocardial infarction has been evaluated. T-wave changes detected in ≥2 infarct-related electrocardiographic leads during dobutamine infusion were defined as follow: (1) negative T waves becoming positive, (2) positive T waves becoming upright ≥2 mm, and (3) negative T waves becoming upright ≥2 mm from baseline. Wall motion score index (WMSI) was defined as the sum of the echocardiographic scores of 16 segments divided by total segments considered at baseline, and at low and peak doses of dobutamine. Patients were classified according to the absence or presence of dobutamine T-wave changes. Those without T-wave changes had a significantly higher WMSI at rest (1.68 ± 0.23 vs 1.50 ± 0.21; p

Original languageEnglish
Pages (from-to)535-539
Number of pages5
JournalThe American Journal of Cardiology
Volume84
Issue number5
DOIs
Publication statusPublished - Sep 1 1999

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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