Use of a Novel Catheter, the MOT-C, for Selective Angiography of the Internal Mammary Artery From Ipsilateral Radial Access.

We describe a novel catheter, the MOT-C (Merit Medical Systems), for selective diagnostic angiography of the internal mammary artery from radial access.We analyzed the pattern of radial versus femoral access for bypass angiography at our institution between 2012 and 2020. We also examined the difference in contrast volume and fluoroscopy time between radial and femoral access and between MOT-C and traditional internal mammary artery (IMA) catheter for bypass angiography.Since the introduction of MOT-C catheter to our laboratory in 2016, there has been a 1.5-fold increase in the use of radial access for bypass angiography. No significant difference in contrast volume or fluoroscopy time was noted between radial and femoral access for bypass angiography. The MOT-C catheter was successfully used in 46% of all cases and 77% of all radial cases between 2016 and 2020 to selectively engage the IMA. When compared with the traditional IMA catheter, no statistically significant difference was noted in contrast volume or fluoroscopy time with the use of MOT-C for bypass angiography, although there was a trend toward lower contrast use. Furthermore, no catheter-related complications occurred.The MOT-C facilitates improved engagement of IMA grafts with minimal manipulation and allows for high-quality diagnostic angiograms with a potential decrease in contrast volume compared with the more traditionally used IMA catheter.