FREE NEJM E-TOC    HOME   |   SUBSCRIBE   |   CURRENT ISSUE   |   PAST ISSUES   |   COLLECTIONS   |   Search Term  Advanced Search

Sign in | Get NEJM's E-Mail Table of Contents — Free | Subscribe

Previous Volume 328:1570 May 27, 1993 Number 21 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

	Full Text Purchase this article Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited

To the Editor: Sabia et al. (Dec. 24 issue)¹ used myocardial contrast echocardiography to assess collateral flow, on the basis of experimental validation studies. The accuracy of this method in determining collateral flow in humans with chronic coronary occlusion has, to my knowledge, never been demonstrated. Nevertheless, total occlusion of a coronary artery is a "stable" coronary condition that would have allowed a comparison of the distribution of the microbubbles in collateral-dependent areas with the results of other techniques for the assessment of myocardial flow, such as perfusion scintigraphy.

The choice of angiographic grading of collateral vessels is unclear and . . . [Full Text of this Article]

References

HOME  |  SUBSCRIBE  |  SEARCH  |  CURRENT ISSUE  |  PAST ISSUES  |  COLLECTIONS  |  PRIVACY  |  TERMS OF USE  |  HELP  |  beta.nejm.org Comments and questions? Please contact us. The New England Journal of Medicine is owned, published, and copyrighted © 2009 Massachusetts Medical Society. All rights reserved.