When do you use a tapering coronary stent ? Which company makes it ?

Coronary artery lumen has unique character . Its well-known  LAD diameter is not constant , it tapers in its distal course.(Unlike RCA which is more tubular ) It is estimated LAD looses 15 % of its diameter for every 30mm length.Fortunately LCX has no such long course to make tapering a visible threat. (Though it may still be an Issue !) Is there a hemodyanmic purpose for this tapering in LAD ? Should be, God never designs anatomy without a physiological purpose.We have to find it  out.(Can it be meant for  flow acceleration as the flow is entriely diastolic in LAD while in RCA its both in systole and diastole ?_ What is the relationship between tapering angle and final distal diameter? Schematic of an artery with a tapered angle of 0:16 .Ref XIANG SHEN Journal of Mechanics in Medicine and Biology Vol. 16, No. 8 (2016) So, if you have a long lesion in proximal LAD and planning to stent with a 40 mm or long  stent the distal end is hyperinflated by atleast 1.5mm if we use a non tapered stent. Though , gain of extralumen diameter  in distal segment might appear attractive, this may not work to our advantage since it defies and distors  the natural hemodynamic flow pattern. Further , when you have tapering vessel proximal optimisation becomes more important. How about a tapering coronary stent ? It should be a welcome addition to our already overflowing coronary hardware in fixing long lesions . Its still a  surprise why only ver...
Source: Dr.S.Venkatesan MD - Category: Cardiology Authors: Tags: Cardiology -Technology Cardiology Innovations Cath lab Hardware Uncategorized biomime morph long tapering coronary stent lad coronary diameter tapers rca long stent tapering meril morph overlapping vs tapering stent rate of tapering of cor Source Type: blogs