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CHARLES B. HANTLER, MD; HOWARD C. MITZEL, PHD
San Antonio, Tex

Arch Surg. 1993;128(3):358.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.—I read with interest the article by Diebel et al¹ in the July 1992 issue of the ARCHIVES. Because of the lack of a constant or predictable relationship between pressure and volume, methods of determining ventricular volume have been of interest to physicians caring for the critically ill. This article, in showing a correlation between right ventricular end-diastolic volume (EDV) index and cardiac index (CI) derived from measurements from the same catheter, appears to add little new information regarding the accuracy of the right ventricular ejection fraction (RVEF) catheter in measuring right ventricular EDV.

Showing correlations between CI and hemodynamic parameters as an approximation of the EDV index of the right and/or left ventricle begs the very question being addressed in the article. Even if one were to assume that CI is an appropriate correlate of true EDV, the use of a measurement derived from the RVEF . . . [Full Text PDF of this Article]

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