Coronary artery vasospasm during dobutamine stress echocardiography

Amar D. Patel, Stamatios Lerakis, Achilles Zacharoulis, Randolph P. Martin

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

Compared with the frequent occurrence of S-T segment depression, the development of S-T segment elevation during dobutamine stress echocardiography is a relatively rare finding, especially in the setting of nonobstructive coronary artery disease. We present two patients who developed chest discomfort with S-T segment elevation during dobutamine stress testing. Both patients had unremarkable baseline echocardiograms and no history suggestive of coronary vasospasm. Subsequent coronary angiography revealed nonobstructive disease. It is speculated that the likely presence of endothelial dysfunction coupled with mild coronary atherosclerosis caused an imbalance between the coronary vasodilatory and vasoconstrictive forces. The inhibition of the vasodilatory effects of β-adrenergic receptor stimulation and flow-mediated dilation of dobutamine was overcome by the vasoconstrictive effects of dobutamine-stimulated α-1 receptor activation; thus, contributing to the development of coronary vasospasm. This condition is important to recognize and appreciate as the initial treatment for this condition favors the use of nitrates over β-blockade.

Original languageEnglish
Pages (from-to)486-489
Number of pages4
JournalJournal of the American Society of Echocardiography
Volume18
Issue number5
DOIs
StatePublished - May 2005
Externally publishedYes
EventSixteenth Annual Scientific Sessions - Boston, MA, United States
Duration: 15 Jun 200518 Jun 2005

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