TCT-11: In-Stent Restenosis is Not a Benign Clinical Entity, Presenting As Acute Coronary Syndrome In 40 % Of Cases

Background Restenosis after percutaneous coronary intervention (PCI) was earlier thought to be a benign event clinically manifested as stable exertional angina. The aim of this prospective multicenter registry study was to investigate the incidence of acute coronary syndrome in patients with restenosis in Sweden. Methods Using data from the Swedish Coronary Angiography and Angioplasty Registry (SCAAR), we analyzed all registered cases of PCI for restenosis (in-stent, after balloon angioplasty) from 1995 to 2005 in Sweden. Both multivessel and single vessel interventions were included. Restenosis presentations were classified as: stable angina; unstable angina/non-STEMI; STEMI; and other reasons. As routine angiographic screening was not performed, restenosis episodes were defined clinically based on symptoms. Results We identified 6642 cases of restenosis in 2978 patients (4790 in men, 1852 in women). Restenosis presented in 39.7% of cases as stable angina, in 46.0% as unstable angina/non-STEMI, in 11.5% as STEMI and in 2.8% as other reasons. Cardiogenic shock was reported in 48 patients. Women had a higher incidence of unstable angina/non-STEMI compared with men (52.3% v. 43.6%) but a lower incidence of STEMI (9.6% v. 12.2%). The frequency of STEMI was lower with restenosis after balloon angioplasty v. in-stent restenosis (6.9% v. 13.8%), and after drug-eluting stents v. bare metal stents (7.9% v. 18.5%). Mortality rate was 1.7% at 30 days, 3.2% at 6 months and 4.6% at one year in patients with restenosis. These covariates were independent predictors of acute coronary syndrome: gender, age, vessel diameter, smoking, stent type, number of stents, treated vessel, previous stroke and previous infarction. Conclusion The majority of patients with coronary restenosis present either with acute MI or unstable angina requiring hospitalization and new interventions. Women may have a higher risk of developing acute coronary syndrome due to restenosis. Prevention of restenosis may be an important target for improvement of “hard” clinical outcomes in patients undergoing coronary revascularization.

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Risk Factors Associated with Acute Coronary Syndrome after Successful Percutaneous Coronary Intervention

Acta Medica Marisiensis ◽

10.1515/amma-2017-0036 ◽

2017 ◽

Vol 63 (4) ◽

pp. 170-172

Author(s):

Violeta Dinesch ◽

Mihail Dinesch ◽

Ileana Voichita Sirbu ◽

Cosmin Macarie ◽

Mircea Buruian

Keyword(s):

Percutaneous Coronary Intervention ◽

Acute Coronary Syndrome ◽

Coronary Intervention ◽

Bare Metal Stent ◽

Bare Metal ◽

Metal Stent ◽

Coronary Syndrome ◽

Stent Restenosis ◽

Percutaneous Coronary ◽

In Stent Restenosis

AbstractObjective: Admission for acute coronary syndrome after successful percutaneous coronary intervention is a delicate situation for the patient and doctor. Predictors of these cases are poorly described.Methods: We retrospectively analysed the files of post-percutaneous coronary intervention patients admitted to the Department of Cardiology of the Institute for Cardiovascular Disease and Heart Transplant in Tirgu Mures between January 2012 and December 2015. Analyses using the t-test, chi-square test, and Fisher test were performed to compare demographics, clinical and angiographic characteristics of patients with acute coronary syndrome, patients with stable angina, and those without symptoms.Results: One hundred eighty post-percutaneous coronary intervention patients were readmitted; 46 patients (25.55%) were readmitted for acute coronary syndrome. Histories of arterial hypertension and renal dysfunction at hospital admission were associated with acute coronary syndrome. Bare metal stent in-stent restenosis and localisation of bare metal stent in-stent restenosis of the left descendent coronary artery were angiographic predictors of acute coronary syndrome.Conclusion: Several clinical and angiographic factors identify patients at high risk for acute coronary syndrome after successful percutaneous coronary intervention. Recognition and treatment of these factors may prevent readmission for such a dangerous condition and may improve outcomes.

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