[The assessment of the patency of coronary bypass vessels with a 2D T2-weighted turbo-spin-echo sequence (HASTE) in the breath-hold technic].
OBJECTIVE
To evaluate the patency of coronary artery bypass grafts with a 2D T2-weighted breath-hold turbo-spin-echo sequence.


METHODS
38 patients with 97 grafts (19 internal mammary artery and 78 saphenous vein grafts) and a total of 120 distal anastomoses were studied at 1.5 Tesla in supine position using a phased array body coil. An ECG gated 2D T2-weighted breath-hold turbo-spin-echo sequence (HASTE) was performed. Reference method was selective coronary angiography. The image material was evaluated independently by two radiologists (observer one, a radiological fellow and the second a staff radiologist).


RESULTS
Observer 1 reached a sensitivity of 96% (72/75) and a specificity of 91% (20/22), positive predictive value was 97%, negative predictive value 87%. 79 of the 97 (81%) patent distal anastomoses were correctly identified. Observer 2 achieved a sensitivity of 92% (69/75) and a specificity of 82% (18/22), positive and negative predictive values were 95% and 75% respectively. From 97 patent distal anastomoses 59 (61%) were recognized. The interobserver agreement was good (Cohen's kappa = 68%, p-value [McNemar] = 58%).


CONCLUSIONS
Using the HASTE sequence a reliable assessment of graft patency is possible. This sequence is a helpful tool for planning flow measurements and 3D MR angiography.
Kalden
P
P
Klinik und Poliklinik für Radiologie, Johannes-Gutenberg-Universität, Mainz. kalden@radiologie.klinik.uni-mainz.de
Kreitner
K F
KF
Wittlinger
T
T
Voigtländer
T
T
Krummenauer
F
F
Schreiber
W
W
Thelen
M
M
D000368:Aged; D016001:Confidence Intervals; D003287:Contrast Media; D017023:Coronary Angiography / Q000379:methods / Q000706:statistics & numerical data; D001026:Coronary Artery Bypass / Q000706:statistics & numerical data; D003331:Coronary Vessels / Q000473:pathology*; D005260:Female; D006083:Graft Occlusion, Vascular / Q000175:diagnosis*; D006801:Humans; D007472:Iohexol / Q000031:analogs & derivatives; D018810:Magnetic Resonance Angiography / Q000379:methods* / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D012119:Respiration; D012680:Sensitivity and Specificity
D003287:Contrast Media; D007472:Iohexol; C038192:iopromide
Beurteilung der Durchgängigkeit von koronaren Bypassgefässen mit einer 2D T2-gewichteten Turbo-Spin-Echo-Sequenz (HASTE) in Atemanhaltetechnik.