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[Comparative study of balloon dilatation and stent placement in primary angioplasty].

OBJECTIVE
To communicate our results with primary angioplasty (PA) and stenting de novo in acute myocardial infarction.


MATERIAL AND METHODS
163 patients (pts) had clinical diagnosis of MI with an average onset time of symptoms of 2.5 hours. They were divided in two groups: 100 pts with PA using only balloon (group I) and 63 pts with primary stenting (group II) (63 pts with 85 stents). A high pressure technique (14-16 atm) was used in group II and all pts were on salicylic acid and ticlopidine. Both groups were compared.


RESULTS
Clinical characteristics, infarct location and infarct related-artery were similar, being left anterior descending the more frequently vessel involved. Clinical success rate was higher in group II (97% vs 87%) and complication rate was threefold higher in group I (9% vs 3%). A mean follow up of 57 months in group I showed a 21% clinical and/or angiographic restenosis rate, while the 12 months follow up in group II failed to show any case of restenosis at all.


CONCLUSIONS
The use of stents in PA improves the results achieved with balloon procedures. There is a greater success rate, less complications and better survival patients who had the procedure while being in cardiogenic shock.