994-96 The Impact of the Vessel Position on the Accuracy of Vessel Measurement in Routine Quantitative Coronary Arteriography

Usefulness of Doppler echocardiography guidance during balloon aortic valvuloplasty for the treatment of congenital aortic stenosis

“…Quantitative angiography provides an indirect measurement of the vessel and small errors in catheter calibration can translate into considerable error in vessel diameter measurements, especially with catheters of small size (less than 6 F) which are the most frequently used in the pediatric population. In fact, several studies have demonstrated that vessel angiographic measurements can significantly overestimate vessel diameters compared to ultrasound and histological measurements [18][19][20][21]. The use of radioopaque calibration markers in the catheter has been introduced to minimize errors in angiographic measurements but vessel diameter overestimation has also been demonstrated with the use of calibrated catheters [19].…”