%0 Journal Article %A Mazhar Khan %T If directional coronary atherectomy is useful then why is it not used more often? %D 1997 %R 10.1136/hrt.78.Suppl_2.33 %J Heart %P 33-34 %V 78 %N Suppl 2 %U https://heart.bmj.com/content/heartjnl/78/Suppl_2/33.full.pdf