This paper investigates calibration of Hargreaves equation in Xiliaohe Basin. Twelve meteorologicalgauges located within Xiliaohe Basin in Northeast China were monitored during 1970 and 2014 providing continuous recor...This paper investigates calibration of Hargreaves equation in Xiliaohe Basin. Twelve meteorologicalgauges located within Xiliaohe Basin in Northeast China were monitored during 1970 and 2014 providing continuous records of meteorological data. Taking daily ET<sub>0</sub> calculated by Penman-Montieth equation as the benchmark, the error of Hargreaves equation for computing ET<sub>0</sub> was evaluated and the investigation on regional calibration of Hargreaves equation was carried out. Results showed there was an obvious difference between the calculating results of Hargreaves and Penman-Monteith equation. The estimation of the former was obviously higher during June and September while lower during the rest time in a year. The three empirical parameters of the Hargreaves equation were calibrated using the SCE-UA (Shuffled Complex Evolution) method, and the calibrated Hargreaves equation showed an obvious promotion in the accuracy both during the calibration and verification period.展开更多
Objectives:Meta-analysis was performed to evaluate the effect of staged revascularization with concomitant chronic total occlusion(CTO)in the non-infarct-associated artery(non-IRA)in patients with ST-segment elevation...Objectives:Meta-analysis was performed to evaluate the effect of staged revascularization with concomitant chronic total occlusion(CTO)in the non-infarct-associated artery(non-IRA)in patients with ST-segment elevation myocardial infarction(STEMI)treated with primary percutaneous coronary intervention(p-PCI).Methods:Various electronic databases were searched for studies published from inception to June,2021.The primary endpoint was all-cause death,and the secondary endpoint was a composite of major adverse cardiac events(MACEs).Odds ratios(ORs)were pooled with 95%confidence intervals(CIs)for dichotomous data.Results:Seven studies involving 1540 participants were included in thefinal analysis.Pooled analyses revealed that patients with successful staged revascularization for CTO in non-IRA with STEMI treated with p-PCI had overall lower all-cause death compared with the occluded CTO group(OR,0.46;95%CI,0.23–0.95),cardiac death(OR,0.43;95%CI,0.20–0.91),MACEs(OR,0.47;95%CI,0.32–0.69)and heart failure(OR,0.57;95%CI,0.37–0.89)com-pared with the occluded CTO group.No significant differences were observed between groups regarding myocardial infarction and repeated revascularization.Conclusions:Successful revascularization of CTO in the non-IRA was associated with better outcomes in patients with STEMI treated with p-PCI.展开更多
Background：Despite its severity,coronary artery ectasia （CAE） is still poorly understood.High-sensitivity C-reactive protein （hs-CRP） has been recognized as a prognostic factor in some cardiovascular diseases but...Background：Despite its severity,coronary artery ectasia （CAE） is still poorly understood.High-sensitivity C-reactive protein （hs-CRP） has been recognized as a prognostic factor in some cardiovascular diseases but not assessed in CAE.The aim of this observational study was to investigate the prognostic value of hs-CRP in CAE.Methods：Our analysis evaluated the effect of the baseline hs-CRP on cardiovascular events （CVs） （cardiac death and nonfetal myocardial infarction） in consecutively enrolled stable CAE patients.We used the Cox proportional hazards regression models to examine the association between baseline hs-CRP level and follow-up CVs in CAE.The net reclassification improvement and integrated discrimination improvement （IDI） of hs-CRP were also assessed.Results：We obtained the follow-up results of 540 patients over a median follow-up period of 36 （37.41 ± 15.88） months.The multivariable Cox analysis showed that the hs-CRP was a significant predictor of adverse outcomes in CAE （hazard ratio [HR]：2.99,95% confidence interval [CI]：1.31-6.81,P =0.0091）.In Kaplan-Meier analysis,the group with hs-CRP 〉3 mg/L had a lower cumulative 66-month event-free survival rate （log-rank test for trend,P =0.0235） and a higher risk ofCVs （HR =2.66,95% CI：1.22-5.77,P =0.0140） than the group with hs-CRP ≤3 mg/L.Hs-CRP added predictive information beyond that given by the baseline model comprising the classical risk factors （P value for IDI =0.0330）.Conclusions：A higher level of hs-CRP was independently associated with cardiac death and nonfatal myocardial infarction in CAE patients.The hs-CRP level may therefore provide prognostic information for the risk stratification of CAE patients.展开更多
文摘This paper investigates calibration of Hargreaves equation in Xiliaohe Basin. Twelve meteorologicalgauges located within Xiliaohe Basin in Northeast China were monitored during 1970 and 2014 providing continuous records of meteorological data. Taking daily ET<sub>0</sub> calculated by Penman-Montieth equation as the benchmark, the error of Hargreaves equation for computing ET<sub>0</sub> was evaluated and the investigation on regional calibration of Hargreaves equation was carried out. Results showed there was an obvious difference between the calculating results of Hargreaves and Penman-Monteith equation. The estimation of the former was obviously higher during June and September while lower during the rest time in a year. The three empirical parameters of the Hargreaves equation were calibrated using the SCE-UA (Shuffled Complex Evolution) method, and the calibrated Hargreaves equation showed an obvious promotion in the accuracy both during the calibration and verification period.
基金supported by the Beijing Tsinghua Changgung Hospital Fund(grant No.12019C1009).
文摘Objectives:Meta-analysis was performed to evaluate the effect of staged revascularization with concomitant chronic total occlusion(CTO)in the non-infarct-associated artery(non-IRA)in patients with ST-segment elevation myocardial infarction(STEMI)treated with primary percutaneous coronary intervention(p-PCI).Methods:Various electronic databases were searched for studies published from inception to June,2021.The primary endpoint was all-cause death,and the secondary endpoint was a composite of major adverse cardiac events(MACEs).Odds ratios(ORs)were pooled with 95%confidence intervals(CIs)for dichotomous data.Results:Seven studies involving 1540 participants were included in thefinal analysis.Pooled analyses revealed that patients with successful staged revascularization for CTO in non-IRA with STEMI treated with p-PCI had overall lower all-cause death compared with the occluded CTO group(OR,0.46;95%CI,0.23–0.95),cardiac death(OR,0.43;95%CI,0.20–0.91),MACEs(OR,0.47;95%CI,0.32–0.69)and heart failure(OR,0.57;95%CI,0.37–0.89)com-pared with the occluded CTO group.No significant differences were observed between groups regarding myocardial infarction and repeated revascularization.Conclusions:Successful revascularization of CTO in the non-IRA was associated with better outcomes in patients with STEMI treated with p-PCI.
文摘Background：Despite its severity,coronary artery ectasia （CAE） is still poorly understood.High-sensitivity C-reactive protein （hs-CRP） has been recognized as a prognostic factor in some cardiovascular diseases but not assessed in CAE.The aim of this observational study was to investigate the prognostic value of hs-CRP in CAE.Methods：Our analysis evaluated the effect of the baseline hs-CRP on cardiovascular events （CVs） （cardiac death and nonfetal myocardial infarction） in consecutively enrolled stable CAE patients.We used the Cox proportional hazards regression models to examine the association between baseline hs-CRP level and follow-up CVs in CAE.The net reclassification improvement and integrated discrimination improvement （IDI） of hs-CRP were also assessed.Results：We obtained the follow-up results of 540 patients over a median follow-up period of 36 （37.41 ± 15.88） months.The multivariable Cox analysis showed that the hs-CRP was a significant predictor of adverse outcomes in CAE （hazard ratio [HR]：2.99,95% confidence interval [CI]：1.31-6.81,P =0.0091）.In Kaplan-Meier analysis,the group with hs-CRP 〉3 mg/L had a lower cumulative 66-month event-free survival rate （log-rank test for trend,P =0.0235） and a higher risk ofCVs （HR =2.66,95% CI：1.22-5.77,P =0.0140） than the group with hs-CRP ≤3 mg/L.Hs-CRP added predictive information beyond that given by the baseline model comprising the classical risk factors （P value for IDI =0.0330）.Conclusions：A higher level of hs-CRP was independently associated with cardiac death and nonfatal myocardial infarction in CAE patients.The hs-CRP level may therefore provide prognostic information for the risk stratification of CAE patients.
