Lei Guo1, Jian Wu1, Lei Zhong1, Huaiyu Ding1, Jiaying Xu1, Xuchen Zhou1, Rongchong Huang2. 1. Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, China. 2. Department of Cardiology, The First Affiliated Hospital of Dalian Medical University, Dalian City, China. Electronic address: rchuang@dmu.edu.cn.
Abstract
OBJECTIVES: There are little data on the long-term clinical outcomes of medical therapy (MT) compared with revascularization in patients with chronic total occlusions (CTOs). METHODS: Between January 2007 and December 2016, a total of 1655 patients with ≥1 CTO were enrolled in our center and were divided into the MT group (n = 800) and revascularization group (n = 855) according to the initial treatment strategy. Propensity score matching was also performed to adjust for baseline characteristics. The primary outcome was cardiac death. RESULTS: After 2 years of follow-up, there was no significant difference between the two groups with regard to the prevalence of cardiac death (MT vs. revascularization: 6.6% vs. 4.2%, adjusted hazard ratio [HR] 0.95, 95% confidence interval [CI] 0.60-1.49, p = 0.820). In the propensity-matched population (406 pairs), there were no significant differences in the prevalence of cardiac death (MT vs. revascularization: 5.4% vs. 4.7%, HR 0.88, 95% CI 0.48-1.63, p = 0.694), except for target vessel revascularization (TVR) (0.44, 0.31-0.63, <0.001) and major adverse cardiovascular events (MACE) (0.51, 0.38-0.68, <0.001), between the two groups. There were also no significant differences in the prevalence of cardiac death (MT vs. successful CTO-PCI: 6.6% vs. 4.0%, HR 0.94, 95% CI 0.41-2.15, p = 0.881) between the MT and successful CTO-PCI groups. CONCLUSION: As an initial management strategy in patients with CTOs, revascularization did not reduce the risk of cardiac death compared with treatment with medical therapy alone. However, revascularization was associated with reduction in the prevalence of TVR and MACE. Furthermore, successful CTO-PCI was also not associated with improved long-term survival compared with MT alone.
OBJECTIVES: There are little data on the long-term clinical outcomes of medical therapy (MT) compared with revascularization in patients with chronic total occlusions (CTOs). METHODS: Between January 2007 and December 2016, a total of 1655 patients with ≥1 CTO were enrolled in our center and were divided into the MT group (n = 800) and revascularization group (n = 855) according to the initial treatment strategy. Propensity score matching was also performed to adjust for baseline characteristics. The primary outcome was cardiac death. RESULTS: After 2 years of follow-up, there was no significant difference between the two groups with regard to the prevalence of cardiac death (MT vs. revascularization: 6.6% vs. 4.2%, adjusted hazard ratio [HR] 0.95, 95% confidence interval [CI] 0.60-1.49, p = 0.820). In the propensity-matched population (406 pairs), there were no significant differences in the prevalence of cardiac death (MT vs. revascularization: 5.4% vs. 4.7%, HR 0.88, 95% CI 0.48-1.63, p = 0.694), except for target vessel revascularization (TVR) (0.44, 0.31-0.63, <0.001) and major adverse cardiovascular events (MACE) (0.51, 0.38-0.68, <0.001), between the two groups. There were also no significant differences in the prevalence of cardiac death (MT vs. successful CTO-PCI: 6.6% vs. 4.0%, HR 0.94, 95% CI 0.41-2.15, p = 0.881) between the MT and successful CTO-PCI groups. CONCLUSION: As an initial management strategy in patients with CTOs, revascularization did not reduce the risk of cardiac death compared with treatment with medical therapy alone. However, revascularization was associated with reduction in the prevalence of TVR and MACE. Furthermore, successful CTO-PCI was also not associated with improved long-term survival compared with MT alone.