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What are the precautions to be taken during PCI when we encounter thrombus containing lesions ?

Posted Mar 22 2009 3:55pm

First and foremost is

Avoid the procedure if  not really indicated.A lesion which  has more thrombus load  than a plaque and it is ,  subcritical and not limiting the flow  , PCI may be inappropriate  especially if the ACS is stabilised.

  • Adequate anticoagulation  along with  2b 3a blockers should be used
  • Predilatation should be minimally used or to avoided.Direct stenting preferred.
  • In primary PCI suction devices (Export etc may be useful)
  • Distal protective devices  are  “hyped up devices” rarely useful in an occasional patient with good distal vessel diameter.
  • Pseudo stent approximati(fig 1) may occur. A Layer of thrombus may get plastered between stent and the vessel wall.In the post PCI  phase , with intense anticoagulation and antiplatelet regimen this layer may get dissolved and stent  may lose it’s grip and may dislodge or migrate.Another possibility is the dead space  beneath the stent  becomes a potential site for future  thrombus and ACS.

thrombus-and-pci

Fig 1

  • To prevent this complication , high pressure inflations and Post procedure IVUS (Intra vascualr ultraound may be done to ascertain lack of thromus between stent/vessel wal  interface)
  • Drug eluting stent evoked a special concern , when used in thrombotic milleu.This , has now been  proven to be  safe
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