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Predictors of cardiac death in patients with coronary chronic total occlusion not revascularized by PCI. | LitMetric

Background: Limited data are available on clinical outcome of patients with previously failed or not attempted chronic total occlusion (CTO) recanalization by percutaneous coronary intervention (PCI). The aim of the study is to determine prevalence and predictors of cardiac death in patients with CTO not revascularized by PCI.

Methods: Double-center study analyzing data of 1.345 consecutive patients with at least one CTO between 1998 and 2008. Of these, 847 patients were successfully revascularized (Revascularized group) and 498 patients were not revascularized (Not revascularized group) either due to failure of CTO-PCI (n=337) or because no attempt was made (n=161).

Results: At 4-year clinical follow-up, Not revascularized patients had a significantly higher rate of cardiac mortality (8.5% vs. 2.5%, p<0.0001) and sudden cardiac death (2.7% vs. 0.5%, p=0.001) compared to those Revascularized. The separate adjusted Cox-model analysis made for Not revascularized patients showed the most significant independent predictors of cardiac death were: chronic renal failure [HR (CI), 6.0 (2.66-13.80)], low-LVEF [5.7 (2.84-11.58)], insulin-dependent diabetes mellitus (IDDM) 4.6 [(1.96-10.97)]. In the Revascularized group, the presence of 3-vessel disease was the only significant independent predictor of cardiac death [4.4 (1.40-13.70)].

Conclusions: CTO patients Not revascularized had a significant higher rate of cardiac mortality and sudden cardiac death compared to those Revascularized. Within Not revascularized patients, the presence of low-LVEF, or CRF or IDDM was associated with an incidence of cardiac death at least 4 times higher than those without the same risk factors.

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http://dx.doi.org/10.1016/j.ijcard.2012.12.044DOI Listing

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