Pharmacoinvasive strategy versus primary angioplasty in patients with acute ST-segment elevation myocardial infarction / Estrategia farmacoinvasiva versus angioplastia primaria en pacientes con infarto agudo al miocardio con elevación del segmento ST

Abstract: Background: Primary percutaneous coronary intervention (PPCI) is the treatment of choice for acute ST-elevation myocardial infarction (STEMI). The delays associated with PPCI reduce the benefits of this therapy. To minimize these delays, the pharmacoinvasive strategy (PS) was developed, consisting of applying thrombolytic therapy followed by coronary angioplasty 2 to 24 hours after. Objective: To compare the safety and efficiency of PPCI vs PS in STEMI. Methods: We included patients with STEMI who had emergency PCI. The primary endpoint was combined major adverse cardiac events (MACE), death, reinfarction, stroke, target vessel revascularization (TVR) during hospitalization. The secondary endpoints were the individual components of MACE, and major bleeding (Bleeding Academic Research Consortium: BARC ≥ 3). Results: A total of 400 patients, 263 (65.8%) for PPCI group, 114 (28.5%) for PS group and 23 (5.75%) for diagnostic group. The PS group, 79 (69.3%) were then categorized as systematic angioplasty having had a successful thrombolysis, and 35 (30.7%) were rescue angioplasty because they had a failed thrombolysis. There were no differences in MACE: 13 (9.5%) patients in PS and 27 (10.3%) patients in the PPCI (p = 0.806), there were no differences in the individual components of MACE. The rate of major bleeding was the same, 5 (3.6%) and 4 (1.5%) respectively (p = 0.173). The multivariate analysis did not show a relationship between MACE and the reperfusion strategy. Conclusions: The pharmacoinvasive strategy when compared to PPCI has a similar rate of primary and secondary endpoints. There is no increase in major bleeding therefore, it is an important strategy that offers a reperfusion therapy for patients with STEMI in a non-PCI capable hospital.(AU)

Resumen: Antecedentes: La intervención coronaria percutánea primaria (ICPP) es el tratamiento de elección en infarto agudo al miocardio con elevación del ST (IAMCEST). El retraso relacionado con ICPP disminuye el beneficio. Buscando una reperfusión oportuna se implementa la estrategia farmacoinvasiva (EFI), que consiste en realizar trombólisis seguido de ICP entre 2 a 24 horas después. Objetivo: Comparar la seguridad y eficacia en pacientes sometidos a ICPP contra EFI en IAMCEST. Métodos: Se incluyeron pacientes con IAMCEST sometidos a ICP emergente. El punto final primario son eventos cardiacos adversos mayores (ECAM), muerte, reinfarto, evento vascular cerebral y revascularización del vaso tratado, durante la hospitalización. Los puntos finales secundarios son la presencia de los componentes individuales del ECAM, y el sangrado mayor (BARC ≥ 3). Resultados: Se estudiaron 400 pacientes, 263 (65.8%) de ICPP, 114 (28.5%) a EFI y 23 (5.75%) angiografía diagnóstica. Del grupo EFI, 79 (69.3%) fueron angioplastia sistemática por trombólisis exitosa y 35 (30.7%) por angioplastia de rescate por trombólisis fallida. No se observó diferencia en la frecuencia de ECAM: EFI 13 (9.5%) contra ICPP 27 (10.3%) respectivamente (p = 0.806), tampoco hubo diferencia en los componentes individuales. No se observó diferencia en sangrado mayor, 5 (3.6%) vs 4 (1.5%), (p = 0.173). El análisis multivariado no relacionó la estrategia de reperfusión con los ECAM. Conclusiones: La EFI comparada con ICPP demuestra una tasa similar de ECAM, así como de sus componentes individuales. No se asocia con aumento de hemorragia mayor, concluyendo que ofrece el beneficio de una reperfusión oportuna sin aumento del riesgo en los hospitales que no tienen la capacidad para realizar ICPP.(AU)

Predictors of in-hospital mortality in patients with ST-segment elevation myocardial infarction undergoing pharmacoinvasive treatment

OBJECTIVES: To identify predictors of in-hospital mortality in patients with acute myocardial infarction undergoing pharmacoinvasive treatment. METHODS: This was an observational, prospective study that included 398 patients admitted to a tertiary center for percutaneous coronary intervention within 3 to 24 hours after thrombolysis with tenecteplase. ClinicalTrials.gov: NCT01791764 RESULTS: The overall in-hospital mortality rate was 5.8%. Compared with patients who survived, patients who died were more likely to be older, have higher rates of diabetes and chronic renal failure, have a lower left ventricular ejection fraction, and demonstrate more evidence of heart failure (Killip class III or IV). Patients who died had significantly lower rates of successful thrombolysis (39% vs. 68%; p = 0.005) and final myocardial blush grade 3 (13.0% vs. 61.9%; p<0.0001). Based on the multivariate analysis, the Global Registry of Acute Coronary Events score (odds ratio 1.05, 95% confidence interval (CI) 1.02-1.09; p = 0.001), left ventricular ejection fraction (odds ratio 0.9, 95% CI 0.89-0.97; p = 0.001), and final myocardial blush grade of 0-2 (odds ratio 8.85, 95% CI 1.34-58.57; p = 0.02) were independent predictors of mortality. CONCLUSIONS: In this prospective study that evaluated patients with ST-segment elevation myocardial infarction treated by a pharmacoinvasive strategy, the in-hospital mortality rate was 5.8%. The Global Registry of Acute Coronary Events score, left ventricular ejection fraction, and myocardial blush were independent predictors of mortality in this high-risk group of acute coronary syndrome patients. .

The efficacy and safety of pharmacoinvasive therapy with prourokinase for acute ST-segment elevation myocardial infarction patients with expected long percutaneous coronary intervention-related delay.

OBJECTIVES: To elucidate the efficacy and safety of pharmacoinvasive therapy by using prourokinase (prouk) in patients with ST-segment elevation myocardial infarction (STEMI). BACKGROUND: Patients with STEMI often have long percutaneous coronary intervention (PCI)-related delays due to various reasons, which are associated with poor outcomes. METHODS: A randomized study which enrolled patients from four centers in China was conducted. Patients were randomly assigned to accept routine primary PCI or prouk-PCI. The primary end points were the angiographic parameters, including thrombolysis in myocardial infarction (TIMI) flow grade, TIMI frame count, and myocardial blush grade. Secondary endpoints were incidence of major adverse cardiac events (MACE, defined as death from all causes, reinfarction, revascularization, or rehospitalization due to new or worsening congestive heart failure) at 30 days and 1 year. RESULTS: One hundred and ninety-seven eligible patients were enrolled, of whom 100 were randomized to the prouk-PCI group. Significantly more patients in the prouk-PCI group than in the PCI group had an opened infarct-related artery on arrival in the catheterization laboratory (48% vs. 21%, P = 0.0002) and better TIMI frame count after PCI (33 ± 6 vs. 40 ± 10, P < 0.001). At 1-year follow-up, there was a trend that patients in the prouk-PCI group had less chances to have MACE (7.0% vs. 12.6%, P = 0.235) or be readmitted to hospital due to new or worsening congestive heart failure (1.0% vs. 4.1%, P = 0.209). CONCLUSION: A strategy of emergent PCI preceded by fibrinolysis with prouk results in a better myocardial perfusion in infarct-related artery compared with primary PCI alone in patients with STEMI and long PCI-related delay.