Release of von Willebrand factor by cardiopulmonary bypass, but not by cardioplegia in open heart surgery.

Abstract:

:von Willebrand Factor (vWF) is released from endothelial cells. Increased vWF in the coronary circulation during cardiac surgery could be a potential indicator of coronary endothelial injury or stimulation, and thus a possible tool to evaluate regimens of myocardial protection. Release of vWF was investigated in 12 patients undergoing coronary artery bypass surgery with cardiopulmonary bypass (CPB). Concomitant samples of arterial and coronary sinus blood for measurement of vWF (antigen method) were drawn before start of CPB and 1, 4, 10 and 30 min after release of the aortic cross clamp. Additional arterial samples were drawn pre-, per-, and postoperatively. Preoperative arterial vWF was 1.58 +/- 0.59 IU/ml (mean +/- SD), and increased during CPB (highest level 2.37 +/- 0.76 IU/ml, p < 0.0026). No difference between arterial and coronary sinus vWF levels was found. Arterial vWF increased further the first postoperative day (3.96 +/- 0.92 IU/ml, p < 0.0026). In conclusion, systemic vWF is increased during CPB, and may be a possible marker of endothelial injury/activation to evaluate deleterious effects of different equipment for CPB. Reperfusion of the ischaemic, cardioplegic heart did not release vWF in the coronary circulation.

journal_name

Thromb Res

journal_title

Thrombosis research

authors

Valen G,Blombäck M,Sellei P,Lindblom D,Vaage J

doi

10.1016/0049-3848(94)90050-7

subject

Has Abstract

pub_date

1994-01-01 00:00:00

pages

21-9

issue

1

eissn

0049-3848

issn

1879-2472

pii

0049-3848(94)90050-7

journal_volume

73

pub_type

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