RESUMEN
OBJECTIVES: This study compares very late outcomes following primary percutaneous coronary intervention for ST-elevation myocardial infarction (STEMI) with stenting versus balloon angioplasty (BA). BACKGROUND: Stenting compared with BA for STEMI improves outcomes at 6-12 months, but comparisons beyond 6-12 months have not been studied. Recent studies have shown that stent thrombosis (ST) continues to increase beyond 3-5 years and may be higher with drug-eluting stents (DES) than bare metal stents (BMS). We hypothesized that there may be a very late hazard with stenting versus BA due to very late ST. METHODS: From 1994 to 2010 consecutive patients with STEMI treated with BA (n = 601) or stenting (n = 1,594) were prospectively enrolled in our registry and followed for 1-16 years. RESULTS: Patients treated with BA were older, were more often female, had more three-vessel disease, and had smaller vessels. Stented patients had trends for less stent/lesion thrombosis (ST/LT) and target vessel (TV) reinfarction at 1 year. In landmark analyses >1 year, stented patients had more very late ST/LT (6.1% vs. 2.9%, P = 0.002) and more TV reinfarction (7.9% vs. 3.1%, P < 0.001) which remained significant after adjusting for baseline risk. The greatest differences in very late outcomes were between DES and BA, but there were also significant differences between BMS and BA. CONCLUSIONS: There appears to be a very late hazard with stenting versus BA for STEMI. These data should encourage new strategies for prevention of very late ST with both BMS and DES including the development of bio-absorbable polymers and stent platforms.
Asunto(s)
Angioplastia de Balón/efectos adversos , Infarto del Miocardio/terapia , Stents/efectos adversos , Anciano , Femenino , Humanos , Masculino , Estudios Prospectivos , Factores de Tiempo , Resultado del TratamientoRESUMEN
OBJECTIVES: The purpose of this study was to evaluate the frequency and predictors of stent thrombosis (ST) after stenting for ST-segment elevation myocardial infarction (STEMI). BACKGROUND: Stent thrombosis remains a major concern with STEMI patients treated with primary percutaneous coronary intervention. METHODS: Consecutive patients (N = 1,640) undergoing stenting for STEMI were prospectively enrolled in our database and followed for 1 to 15 years. Bare-metal stents were implanted from 1995 to 2002, and drug-eluting and bare-metal stents were implanted from 2003 to 2009. Stent thrombosis was defined as definite or probable. RESULTS: Our population had a high risk profile, including a high incidence of Killip class III to IV (11.5%) and STEMI due to ST (10.2%). Stent thrombosis occurred in 124 patients, including 42 with early ST (0 to 30 days), 35 with late ST (31 days to 1 year), and 47 with very late ST (>1 year). The frequency of ST was 2.7% at 30 days, 5.2% at 1 year, and 8.3% at 5 years. Independent predictors of early or late ST were STEMI due to ST (hazard ratio [HR]: 4.38, 95% confidence interval [CI]: 2.27 to 8.45), small stent size (HR: 2.44, 95% CI: 1.49 to 4.00), Killip class III to IV (HR: 2.39, 95% CI: 1.30 to 4.40), and reperfusion time ≤2 h (HR: 2.09, 95% CI: 1.03 to 4.24). Drug-eluting stent was the only independent predictor of very late ST (HR: 3.73, 95% CI: 1.81 to 7.88). CONCLUSIONS: Stent thrombosis after primary percutaneous coronary intervention is relatively frequent and continues to increase out to 5 years. New strategies are needed to prevent ST in STEMI patients, and targeted therapies are needed in patients identified at highest risk.
Asunto(s)
Angioplastia Coronaria con Balón/estadística & datos numéricos , Reestenosis Coronaria/etiología , Trombosis Coronaria/etiología , Stents Liberadores de Fármacos , Infarto del Miocardio/terapia , Anciano , Clopidogrel , Intervalos de Confianza , Reestenosis Coronaria/epidemiología , Reestenosis Coronaria/patología , Trombosis Coronaria/epidemiología , Trombosis Coronaria/patología , Femenino , Indicadores de Salud , Humanos , Estimación de Kaplan-Meier , Masculino , Infarto del Miocardio/mortalidad , Infarto del Miocardio/patología , Reperfusión Miocárdica , Inhibidores de Agregación Plaquetaria/uso terapéutico , Factores de Riesgo , Índice de Severidad de la Enfermedad , Ticlopidina/análogos & derivados , Ticlopidina/uso terapéutico , Factores de Tiempo , Estados Unidos/epidemiologíaRESUMEN
OBJECTIVES: The purpose of this study was to assess the frequency of very late stent thrombosis (VLST) after stenting with bare-metal stents (BMS) and drug-eluting stents (DES) for ST-segment elevation myocardial infarction (STEMI). BACKGROUND: Stent thrombosis occurs more frequently after stenting for STEMI than after elective stenting, but there are little data regarding VLST. METHODS: Consecutive patients (n = 1,463) who underwent stenting for STEMI were prospectively enrolled in our database. BMS were implanted exclusively from 1995 to 2002, and DES and BMS were implanted from 2003 to 2009. Follow-up was obtained at 1 to 15 years. RESULTS: BMS patients (n = 1,095) were older and had more shock, whereas DES patients (n = 368) had more diabetes and smaller vessels. Stent thrombosis occurred in 107 patients, of which 42 were VLST (>1 year). Stent thrombosis continued to increase to at least 11 years with BMS and to at least 4.5 years with DES. Stent thrombosis rates with BMS versus DES were similar at 1 year (5.1% and 4.0%, respectively) but increased more with DES after the first year (1.9%/year vs. 0.6%/year, respectively). Landmark analysis (>1 year) found DES had a higher frequency of VLST (p < 0.001) and reinfarction (p = 0.003). DES was the only significant independent predictor of VLST (hazard ratio: 3.79, 95% confidence interval: 1.64 to 8.79, p = 0.002). CONCLUSIONS: VLST after primary PCI for STEMI occurs with relatively high frequency to at least 11 years with BMS and to at least 4.5 years with DES. Very late stent thrombosis and reinfarction (>1 year) were more frequent with DES. New strategies are needed to manage this problem.