چكيده لاتين :
Objective- The arm of this study was to identify the incidence, angiographic and procedural
predictors, and clinical outcome of acute side branch occlusion (SBO) following coronary
stent implantation.
Methods- In total, 138 patients who underwent coronary artery stenting were included. The stents
had covered 185 side branches with a luminal diameter greater than 1 mm and less than 2 mm.
All the procedures were performed according to the current standards. The data on the clinical
events and angiographic characteristics were analyzed. The side branch size and the ostium
involvement and its location within the stent were evaluated. SBO was defmed as a
(thrombolysis in myocardial infarction) TIMI flow:s1.
Results- Acute SBO after stent implantation occurred in 24 (12.9%) side branches. A significant
side branch ostial stenosis (?:50%) and side branch diameter at base line :S1.5 mm were
predictors of SBO. Non Q-wave myocardial infarction (MI) was observed in 16.6% of the
patients with acute SBO and in 4% of the cases without SBO (P=O.OO 1). However, during
hospital stay and long-term follow-up, the incidence of major adverse cardiac events (MACE)
comprising death, need for target vessel revascularization, and Q-wave MI was almost similar
in the patients with and in those without acute SBO. No MACE related to SBO was seen in
these patients.
Conclusion- The incidence of acute SBO after coronary stent implantation is relatively frequent.
Major predictors of SBO are side branch diameter <1.5 mm and the presence of an ostial side
branch stenosis ((GREATER THAN OR EQUAL)50%). These data yield support to the assumption that the occlusion of small
and medium-sized branches during coronary artery stent implantation is not associated with an
adverse clinical outcome and should not hinder an optimal interventional therapy of the target
lesion
