BACKGROUND: A collateral circulation which supplies a myocardial territory, subtended by a chronic total occlusion (CTO), may be observed at invasive coronary angiography. The prognostic and protective role of such collateralisation is well demonstrated suggesting that a good collateral circulation may be a predictor of @entity296 , but current evidence is discrepant. The aim of this study is to assess the relationship between collateralisation from the @entity296 by cardiovascular magnetic resonance (CMR). METHOD: Consecutive @entity1 with CTO having had both CMR and invasive coronary angiography were retrospectively identified. The collateral circulation was graded with the Cohen and Rentrop classification. CMR images were graded per segment for wall motion (1: normal/ @entity71 , 2: hypokinetic, 3: @entity2845 , or 4: dyskinetic) and wall motion score index (WMSI) was calculated. The segmental transmurality of late @entity2287 enhancement was scored as 1 (0%), 2 (1-25%), 3 (26-50%), 4 (51-75%) and 5 (76-100%). RESULTS: A good collateral circulation was more likely to supply viable myocardium (p=0.01). There was no relationship between collateral circulation supply and wall motion score index (WMSI), however, increasing transmurality of LGE was significantly associated with higher mean WMSI representing increasing dysfunctional myocardium (p<0.001). CONCLUSION: The presence of collateral coronary circulation at angiography predicts the presence of @entity65 , with a gradation of greater viability associated with improving Rentrop grade. A collateral circulation at angiography should, therefore, prompt more formal assessment of viability and consideration of revascularisation in order for the @entity1 to obtain the associated functional and prognostic improvement.

The relationship between the contralateral collateral supply and XXXX on cardiovascular magnetic resonance: Can the angiogram predict functional recovery?

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity296 :: ('MESH:D009202', 'Disease') :: ['contralateral epicardial vessels and myocardial viability', 'myocardial viability'] @entity71 :: ('MESH:D001289', 'Disease') :: ['hyperkinetic'] @entity2845 :: ('MESH:D018476', 'Disease') :: ['akinetic'] @entity2287 :: ('MESH:D005682', 'Chemical') :: ['gadolinium'] @entity65 :: ('MESH:D002318', 'Disease') :: ['viability on cardiovascular MRI']
@entity296 :: (MESH:D009202,Disease) :: ['myocardial viability']
