Coronary artery bypass grafts: improved electron-beam tomography by prolonging breath holds with preoxygenation.
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.
Enzweiler
C N
CN
Departments of Radiology, Internal Medicine I, and Cardiovascular Surgery, Charité, Humboldt-Universität Berlin, Schumannstrasse 20/21, 10098 Berlin, Germany. christian.enzweiler@charite.de
Kivelitz
D E
DE
Wiese
T H
TH
Taupitz
M
M
Höhn
S
S
Borges
A C
AC
Pietsch
L
L
Dohmen
P
P
Baumann
G
G
Hamm
B
B
D000328:Adult; D000368:Aged; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000000981:diagnostic imaging* / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000008:administration & dosage; D012119:Respiration; D018709:Statistics, Nonparametric; D014057:Tomography, X-Ray Computed / Q000379:methods*
D010100:Oxygen