Why the study?
Does preoxygenation improve the breath-hold interval and depiction of distal graft anastomoses during electron-beam tomography in patients with coronary bypass grafts?
Does preoxygenation improve the breath-hold interval and depiction of distal graft anastomoses during electron-beam tomography in patients with coronary bypass grafts?
Preoxygenation before electron-beam tomography prolongs breath-hold intervals, improving the visualization of distal coronary bypass graft anastomoses.
May improve distal graft coverage on electron-beam tomography; leaves open need for prospective trials before routine adoption.
In 45 patients with coronary bypass grafts, the breath-hold interval with and that without preoxygenation was measured. Its effect on depiction of the distal graft anastomosis at electron-beam tomography was evaluated. Preoxygenation prolonged the breath-hold interval in most patients, thereby allowing greater anatomic coverage including more distal anastomoses. Preoxygenation may improve scanning of coronary bypass grafts and increase detectability of graft stenoses.
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Enzweiler et al. (2000) studied this question.
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