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Optimal timing of percutaneous coronary intervention for non-ST elevated myocardial infarction with congestive heart failure.
OBJECTIVES: This study investigated the optimal timing for percutaneous coronary intervention (PCI) in patients with NSTEMI complicated by heart failure (HF).
METHODS: In total, 762 patients with NSTEMI and HF in a multicenter, prospective registry in South Korea were classified according to the Killip classification (Killip class 2, n = 414 and Killip class 3, n = 348) and underwent early (within 24 h) and delayed (after 24 h) PCI. The primary outcome was all-cause mortality which was further analyzed with landmark analysis with two months as a cut-off. Secondary outcomes were cardiovascular death, in-hospital cardiogenic shock (CS), readmission due to HF, and acute myocardial infarction during follow-up.
RESULTS: Delayed PCI was associated with lower rates of 2-month mortality (6.1 % vs. 15.8 %, p = 0.007) and in-hospital CS (4.3 % vs. 14.1 %, p = 0.003), along with lower risks of 2-month mortality (hazard ratio [HR] = 0.38, 95 % confidence interval [CI] = 0.18-0.83, p = 0.014), in-hospital CS (HR = 0.29, 95 % CI = 0.12-0.71, p = 0.006) in multivariate Cox models of Killip class 3 patients. There was no statistical difference of incidence and risk of all predefined outcomes according to varying timing of PCI in Killip 2 patients.
CONCLUSIONS: Based on these results, the timing of PCI in patients with NSTEMI complicated by HF should be determined based on HF severity. Delayed PCI should be considered in patients with NSTEMI and more severe HF.
METHODS: In total, 762 patients with NSTEMI and HF in a multicenter, prospective registry in South Korea were classified according to the Killip classification (Killip class 2, n = 414 and Killip class 3, n = 348) and underwent early (within 24 h) and delayed (after 24 h) PCI. The primary outcome was all-cause mortality which was further analyzed with landmark analysis with two months as a cut-off. Secondary outcomes were cardiovascular death, in-hospital cardiogenic shock (CS), readmission due to HF, and acute myocardial infarction during follow-up.
RESULTS: Delayed PCI was associated with lower rates of 2-month mortality (6.1 % vs. 15.8 %, p = 0.007) and in-hospital CS (4.3 % vs. 14.1 %, p = 0.003), along with lower risks of 2-month mortality (hazard ratio [HR] = 0.38, 95 % confidence interval [CI] = 0.18-0.83, p = 0.014), in-hospital CS (HR = 0.29, 95 % CI = 0.12-0.71, p = 0.006) in multivariate Cox models of Killip class 3 patients. There was no statistical difference of incidence and risk of all predefined outcomes according to varying timing of PCI in Killip 2 patients.
CONCLUSIONS: Based on these results, the timing of PCI in patients with NSTEMI complicated by HF should be determined based on HF severity. Delayed PCI should be considered in patients with NSTEMI and more severe HF.
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