[Is Palmaz-Schatz stenting effective for second restenosis?]

Area of Science:

• Cardiology
• Interventional Cardiology
• Vascular Medicine

Background:

• Long-term outcomes of coronary stenting in restenotic lesions after percutaneous transluminal coronary angioplasty (PTCA) are less favorable than in de novo lesions.
• The efficacy of coronary stenting in lesions with a history of two prior PTCA procedures remains unclear.

Purpose of the Study:

• To evaluate the outcomes of Palmaz-Schatz coronary stent placement in de novo lesions versus restenotic lesions after one or two prior PTCA procedures.
• To compare the in-stent restenosis rates among these patient groups.

Main Methods:

• Elective Palmaz-Schatz stent placement in 124 patients.
• Patients were categorized into three groups: de novo lesions (n=70), restenotic lesions after one PTCA (n=33), and restenotic lesions after two PTCA (n=21).
• Follow-up angiography at approximately 6 months post-stenting.

Main Results:

• Restenosis rates were similar between the de novo group (19%) and the single restenosis group (27%).
• The second restenosis group exhibited a trend towards a higher restenosis rate (38%) compared to the de novo group (p=0.06).
• Diffuse in-stent restenosis also showed a trend towards higher frequency in the second restenosis group (63%) versus the de novo group (13%, p=0.08).

Conclusions:

• Coronary stenting in patients with repeated restenosis after multiple PTCA procedures may lead to higher restenosis rates.
• Alternative therapeutic strategies should be considered for patients with recurrent in-stent restenosis following multiple angioplasty interventions.