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Objective:To systematically review the efficacy and safety of new oral anticoagulants(NOACs)for the treatment of patients over 70 years with atrial fibrillation.Methods:Studies comparing NOACs(dabigatran, rivaroxaban, apixaban, ximelagatran and edoxaban)versus warfarin for the treatment of patients over 70 years with atrial fibrillation were searched through databases including PubMed, Embase and the Cochrane Library, from the earliest electronic records to those published in March 2021.Stata15.0 software was used for meta-analysis.Results:A total of 19 studies and 215 471 patients were included.Meta-analysis results showed that, compared with warfarin, either a low-dose(110 mg)or a standard-dose(150 mg)of dabigatran reduced the risk of stroke/systemic embolism(SSE)in patients over 70 years with atrial fibrillation.A standard-dose of dabigatran did not decrease the risk of major bleeding, but a low dose was able to achieve it.A standard-dose(20 mg)of rivaroxaban could considerably reduce the risk of SSE in geriatric patients over 70 years with atrial fibrillation without increasing the risk of major bleeding.A standard-dose(5 mg)of apixaban could considerably decrease the risk of SSE and major bleeding in patients over 70 years with atrial fibrillation; A standard-dose(36 mg)of ximelagatran was as effective as warfarin in decreasing the incidence of SSE in patients over 70 years with atrial fibrillation, but could also considerably decrease the risk of major bleeding; A low-dose(15-30 mg)or a standard-dose(30-60 mg)of edoxaban decreased the incidence of SSE in patients over 70 years with atrial fibrillation, as did warfarin, but edoxaban considerably decreased the risk of major bleeding.Conclusions:Compared with warfarin, most of new oral anticoagulants show good efficacy in patients over 70 years old with atrial fibrillation, NOACs given at standard doses increase the risk of major bleeding, but at low doses can realize both efficacy and safety.
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Objective:To investigate the relationship between sarcopenia and early renal dysfunction in elderly patients with type 2 diabetes mellitus(T2DM).Methods:A total of 198 elderly patients with T2DM aged over 60 years undergoing treatment in the Geriatric Department of Beijing Hospital from July 2018 to July 2019 were enrolled in this retrospective case-control study.The estimated glomerular filtration rate(eGFR)is calculated according to the CKD-EPI Cr-Cys formula.Based on the eGFR, the patients were divided into normal renal function group(n=63, in CKD 1 stage)and mild renal dysfunction group(n=135, in CKD 2-3a stage). All subjects underwent physical examination, laboratory examination and dual energy X-ray bone density examination. Results:The age, weight, body mass index, abdominal circumference, serum creatinine, cystatin C, uric acid, diastolic pressure, the proportions of diabetes and hypertension were lower, and the high-density lipoprotein cholesterol, appendicular skeletal muscle mass(ASM)and skeletal muscle mass index(SMI)were higher, in the normal renal function group than in the mild renal dysfunction group( P<0.05 or 0.01). Spearman correlation analysis showed that eGFR was positively correlated with SMI( r=0.343, P<0.01). Logistic regression analysis showed that body weight( OR=1.318, 95% CI: 1.091-1.594), uric acid( OR=1.007, 95% CI: 1.001-1.012), diastolic blood pressure( OR=1.072, 95% CI: 1.033-1.112), years of diabetes( OR=1.075, 95% CI: 1.013-1.142)were risk factors, and the LSM( OR=0.136, 95% CI: 0.047-0.392)and SMI( OR=0.778, 95% CI: 0.703-0.860)were protective factors for the early renal dysfunction in elderly patients with T2DM. Conclusions:Elderly patients with T2DM are often co-existed with sarcopenia.Sarcopenia is associated with early renal dysfunction in elderly patients with T2DM.
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With the acceleration of the aging process in China, the incidence rates of coronary heart disease and cerebral infarction have significantly increased.And iodine contrast agent is often used in imaging diagnosis and percutaneous intervention therapy.The contrast medium is filtered from the glomerulus in its original form and is not absorbed by renal tubules.However, the accumulation of iodine contrast medium in the kidney can lead to acute kidney injury.Kidney is one of the most important excretory and endocrine organs in human body.The prevention and treatment of contrast-induced nephropathy(CIN)have been widely concerned.The incidence rate of contrast-induced renal damage is higher and the prognosis is poorer in the elderly than in the non-elderly due to the decline of organ function in the elderly.At present, the mechanism of action for oxygen free radicals in CIN of the elderly is still unclear.This article reviews the researches on the role of oxygen free radical in CIN of the elderly studied by domestic and foreign scholars in recent years.