TO ASSESS THE ADEQUACY OF CORONARY STENTS DEPLOYMENT (APPOSITION)WITH INTRAVASCULAR ULTRASOUND IN COMPARISON WITH CORONARY ANGIOGRAPHY

Abstract

Objective: To determine the adequacy of stent deployment (apposition) as
assessed by IVUS and its comparison with quantitative coronary angiography
(QCA).
Methodology: In this comparative study we analyzed the stents for adequate
deployment in 100 patients who were randomly selected from the patients who
underwent PCI either with bare metal or drug eluting stent comparing QCA with
IVUS at our catheterization laboratory, Cardiology department. The study was
conducted from August 2010 to February 2011. We used Volcano therapeutic
IVUS system employing Volcano - eagle eye Gold catheter. Stents were said to be
adequately deployed when there was (1) complete apposition of the stent struts
over the entire length of stent. A performa was used to collect patient's details and
record the IVUS analysis. SPSS version 15 was used to analyze the data.
Results: A total of 100 study subjects were included in the study, mean age was
54.38 ± 9.97 years and 85% (85) were male. Diabetics were 40 %(40), 47%(47)
were hypertensives, 46%(46) were dylipidemic and 36%(36) were smokers and
40%(40) had a previous myocardial infarction. It was observed that 85% (34) of
the cases had their struts adequately apposed while in 15%(06) stent apposition
was inadequate and needed to be further dilated .Most of the stents (52.5%) used
were Endeavor. LAD was stented in 72.5 % (72) followed Circumflex12.5 %(
12), RCA 10 %( 10) while Ramus and OM1 in5 %( 6).
Conclusion: In significant number of patients stents were not adequately
deployed requiring re-ballooning to optimize the results as assessed by IVUS.