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Ann Thorac Surg 1996;61:40-41
© 1996 The Society of Thoracic Surgeons
| The first 20% of the full text of this article appears below. |
See also page 36.
DR GUO-WEI HE (Portland, OR): This has been a nice presentation. I have three questions for you. The first question is, what is the final concentration of endothelin-1 in the perfused blood after bolus injection, and is it clinically relevant? This is very important because we know that the plasma concentration of endothelin-1 is very low. Would you like to comment on the clinical relevance of your study?
The second question regards the source of endothelin-1 release. There are two sources to consider. First, after cardiopulmonary bypass, the elevated plasma concentration of endothelin-1 could be due to release from the systemic circulation. Second, as you hypothesized, endothelin-1 could be directly derived from the coronary circulation rather than from the systemic circulation. Your hypothesis is based on the second point, and I appreciate it. However, your results rejected this hypothesis because
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