Transthoracic Doppler echocardiographic comparison of left internal mammary grafts to left anterior descending coronary artery with ungrafted right internal mammary arteries in patients with and without myocardial ischemia by dobutamine stress echocardiography

Adelaide M. Arruda, Patricia A. Pellikka, Douglas W. Mahoney, Anthony Joseph, Wilson Mathias, James B. Seward

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

To characterize Doppler flow patterns of the grafted left internal mammary artery (LIMA) in patients with and without dobutamine stress induced wall motion abnormalities in the graft distribution, we studied 29 patients who underwent coronary artery bypass surgery using LIMA grafts to the left anterior descending coronary artery (LAD). The ungrafted right internal mammary artery (RIMA) was used as a control. RIMA Doppler flow pattern was predominantly systolic in all patients. In patients without ischemia in the LAD distribution, LIMA flow was predominantly diastolic. In patients with ischemia, LIMA flow was predominantly systolic. In the grafted LIMA, a ratio of diastolic to systolic time-velocity integral of >1.5 best showed absence of ischemia in the graft distribution. In summary, characterization of the Doppler flow pattern in the internal mammary arteries is feasible. In the grafted LIMA, ratios of diastolic to systolic flow are less in patients with an ischemic response in the subtended vascular bed than in those without ischemia. Copyright (C) 2000 Excerpta Medica Inc.

Original languageEnglish (US)
Pages (from-to)919-922
Number of pages4
JournalAmerican Journal of Cardiology
Volume86
Issue number9
DOIs
StatePublished - Nov 1 2000

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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