title: Intravascular ultrasound-guided emergency coronary Palmaz-Schatz stent placement without post-procedural systemic anticoagulation.
abstract: OBJECTIVE
  To test the efficacy of intravascular ultrasound (IVUS)-guided stent placement and to determine the clinical outcome during the first 30 days in those patients who were treated with antiplatelet therapy rather than anticoagulants because they met the IVUS criteria for optimal stent placement.
  
  
  METHODS
  Prospective observational study.
  
  
  METHODS
  126 patients with successful, non-elective Palmaz-Schatz stent placement.
  
  
  METHODS
  IVUS was performed to assess the attachment of stent struts, the coverage of the dissection, and the intrastent minimal lumen area.
  
  
  METHODS
  Intrastent lumen area, clinical outcome during the first 30 days.
  
  
  RESULTS
  In all patients IVUS showed complete apposition and coverage of the dissection. In 23 patients (18%) the IVUS lumen area criterion was achieved. In 75 patients, further balloon dilatation was performed and in 41 IVUS criteria were finally fulfilled. The minimal intrastent lumen area increased from a mean (SD) of 6.81 (1.15) mm2 to 9.56 (2.61) mm2 (P < or = 0.01) between the first and final IVUS investigations. 64 patients (51%) who met the IVUS criteria were treated with aspirin (100 mg) and ticlopidine (250 mg) twice a day. During the first 30 days none of the following events occurred: death, myocardial infarction, repeat intervention, aortocoronary bypass surgery, and subacute stent thrombosis.
  
  
  CONCLUSIONS
  The additional information provided by IVUS examination helped the operator to decide whether further dilatation was needed after a coronary stent had been placed. For patients who met the IVUS criteria for optimal stent placement, antiplatelet therapy was associated with an excellent clinical outcome during the first 30 days.
authors.affiliation: 1. Medizinische Klinik, Klinikum rechts der Isar der Technischen Universität, Munich, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Blasini
authors.forename: F J
authors.initials: FJ
authors.lastname: Neumann
authors.forename: G
authors.initials: G
authors.lastname: Richardt
authors.forename: C
authors.initials: C
authors.lastname: Schmitt
authors.forename: R
authors.initials: R
authors.lastname: Paloncy
authors.forename: A
authors.initials: A
authors.lastname: Schömig
mesh_terms: D015906:Angioplasty, Balloon, Coronary; D001241:Aspirin / Q000627:therapeutic use; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000601:surgery* / Q000628:therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use; D011446:Prospective Studies; D015607:Stents; D013988:Ticlopidine / Q000627:therapeutic use; D016896:Treatment Outcome; D018084:Ultrasonography, Interventional
chemical_list: D010975:Platelet Aggregation Inhibitors; D013988:Ticlopidine; D001241:Aspirin