Relation between previously implanted coronary stents and vasospasm: Patient- and vessel-level analysis

Area of Science:

• Cardiology
• Interventional Cardiology
• Vascular Physiology

Background:

• Coronary artery stenting can cause arterial injury, leading to endothelial dysfunction and vasospasm.
• The effect of prior coronary stents on vasospasm during acetylcholine (ACh) testing is not well understood.

Purpose of the Study:

• To investigate the impact of previously implanted coronary stents on vasospasm during intracoronary ACh provocation testing.
• To compare vasospasm rates at both patient and vessel levels in patients with and without prior coronary stents.

Main Methods:

• A total of 1039 patients undergoing ACh provocation tests were analyzed.
• Patients were categorized based on the presence or absence of previously implanted coronary stents.
• Coronary vasospasm was assessed angiographically and correlated with symptoms and ECG changes.

Main Results:

• Patients with prior stents showed a significantly higher incidence of positive ACh tests (60.6% vs. 52.0%).
• Vessels with stents exhibited more frequent ACh-induced vasospasm (50.0% vs. 33.3%) compared to non-stented vessels.
• No significant difference in vasospasm rates was observed between bare metal and drug-eluting stents.

Conclusions:

• Previously implanted coronary stents are associated with increased coronary vasoreactivity during ACh provocation testing.
• Stents influence vasospasm at both the patient and vessel levels, highlighting their role in altered coronary function.