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        低水平高密度脂蛋白膽固醇是經(jīng)皮冠脈介入術(shù)后急性腎損傷的危險(xiǎn)因素

        2014-10-21 20:14:31陳永利許靜劉園園楊世誠(chéng)叢洪良付乃寬
        中華急診醫(yī)學(xué)雜志 2014年9期

        陳永利 許靜 劉園園 楊世誠(chéng) 叢洪良 付乃寬

        DOI:10.3760/cma.j.issn.1671-0282.2014.09.016

        基金項(xiàng)目:天津市衛(wèi)生局科技基金重點(diǎn)攻關(guān)項(xiàng)目(10KG122)

        作者單位:300051 天津,天津市胸科醫(yī)院心內(nèi)科

        通信作者:付乃寬,Email:drfnk2013@163.com

        【摘要】目的 探討低水平高密度脂蛋白膽固醇(high-density lipoprotein cholesterol, HDL-C)與冠心病患者經(jīng)皮冠狀動(dòng)脈介入術(shù)(percutaneous coronary intervention, PCI)后對(duì)比劑誘導(dǎo)的急性腎損傷(contrast induced-acute kidney injury, CI-AKI)的關(guān)系。

        方法 選取天津市胸科醫(yī)院心內(nèi)科2009年1月至2011年5月行PCI術(shù)的冠心病患者共1500例,于術(shù)前及術(shù)后72 h內(nèi)測(cè)定其血肌酐水平。入選標(biāo)準(zhǔn):均為漢族人群,年齡及性別不限;排除標(biāo)準(zhǔn):既往有惡性腫瘤、泌尿系統(tǒng)感染、腎臟切除手術(shù)、腹膜或血液透析治療或術(shù)前兩周內(nèi)曾應(yīng)用過(guò)對(duì)比劑。CI-AKI定義為應(yīng)用對(duì)比劑后24~72 h血清肌酐水平較原有基礎(chǔ)升高超過(guò)25%或絕對(duì)值升高44.2 μmol/L以上,并排除其他影響腎功能的原因。低水平HDL-C定義為HDL-C< 1.04 mmol/L。應(yīng)用單因素分析及多元Logistic回歸分析確定CI-AKI及低水平HDL-C的危險(xiǎn)因素。

        結(jié)果 在1500例行PCI術(shù)的冠心病患者中,共有246例(16.4%)發(fā)生了CI-AKI,低水平HDL-C組與正常水平HDL-C組的CI-AKI發(fā)病率分別為21.5%和13.3%(P<0.01)。進(jìn)一步分析發(fā)現(xiàn),伴有慢性腎臟疾病者,CI-AKI發(fā)病率在低水平HDL-C組與正常水平HDL-C組分別為39.8% 和26.5%(P<0.05),而在不伴有慢性腎臟疾病者分別為9.7% 和17.7%(P<0.01),差異均具有統(tǒng)計(jì)學(xué)意義。多元Logistic回歸分析顯示,低水平HDL-C是冠心病患者PCI術(shù)后CI-AKI發(fā)生的危險(xiǎn)因素,超重、吸煙及貧血是該類患者低水平HDL-C的預(yù)測(cè)因子。

        結(jié)論 與HDL-C水平正常者相比,低水平HDL-C者PCI術(shù)后CI-AKI的發(fā)病率顯著升高。無(wú)論是否伴有慢性腎臟疾病,低水平HDL-C均是冠心病患者PCI術(shù)后發(fā)生CI-AKI的危險(xiǎn)因素。超重、吸煙及貧血是低水平HDL-C的預(yù)測(cè)因子。

        【關(guān)鍵詞】 高密度脂蛋白膽固醇;經(jīng)皮冠狀動(dòng)脈介入治療;急性腎損傷;對(duì)比劑

        Low level of high-density lipoprotein cholesterol predicts contrast induced-acute kidney injury after percutaneous coronary interventions in patients with coronary heart disease

        Chen Yongli,Xu Jing,Liu Yuanyuan,Yang Shicheng,Cong Hongliang, Fu Naikuan.Department of Cardiology,Tianjing Chest Hospital,Tianjing 300051,China

        Corresponding author: Fu Naikuan, Email: drfnk2013@163.com

        【Abstract】Objective To investigate the relationship of low level of high-density lipoprotein cholesterol to contrast induced-acute kidney injury(CI-AKI)after percutaneous coronary intervention (PCI) in patients with coronary heart disease.Methods A total of 1500 consecutive patients,who underwent PCI from January 2009 to May 2011,were enrolled in this study. There was no limit on age or sex, and all patients were self-identified as Han ethnic group. Patients were excluded from this study, however, if they had a history of malignant tumor, urinary tract infection, nephrectomy operation, chronic peritoneal or hemodialysis, or if they had been exposed to contrast media within the past 14 days. CI-AKI was defined as an absolute increase in serum creatinine ≥44.2 μmol/L or a relative ≥25% increase in serum creatinine within 72 hours after procedure. Low level of HDL-C was defined as <1.04 mmol/L. Monofactorial and multivariate analysis was performed to identify risk factors for CI-AKI and low level of HDL-C in these patients. Results Among the 1500 patients with coronary heart disease, CI-AKI occurred in 246 patients after PCI and the overall incidence of CI-AKI was 16.4%. The patients with low level of HDL-C had a higher incidence of CI-AKI than those without it(21.5% vs. 13.3% in total,P<0.01),no matter that they had suffered from chronic kidney disease(39.8% vs. 26.5%,P<0.05)or not(17.7% vs. 9.7%,P<0.01). By multivariate analysis, low level of HDL-C was identified as an independent risk factor for CI-AKI and smoke, great BMI as well as anemia were considered as prediction factors for low level of HDL-C. Conclusion The patients with low level of HDL-C have a higher incidence of CI-AKI after PCI. Low level of HDL-C is one of risk factors for CI-AKI after PCI in patients either with chronic kidney disease or not. Great BMI,smoking as well as anemia are independent predictors for low HDL-C level in these patients.

        【Key words】 High-density lipoprotein cholesterol; Percuta neous coronary intervention; Acute kidney injury; Contrast

        對(duì)比劑誘導(dǎo)的急性腎損傷(contrast induced-acute kidney injury, CI-AKI)是指應(yīng)用對(duì)比劑后24~72 h血清肌酐水平較原有基礎(chǔ)升高超過(guò)25%或絕對(duì)值升高44.2 μmol/L以上,并排除其他影響腎功能的原因[1]。文獻(xiàn)報(bào)道,CI-AKI已成為繼外科手術(shù)及藥物之后院內(nèi)獲得性腎損害的第三大原因[2]。一旦發(fā)生CI-AKI,患者的住院時(shí)間、住院費(fèi)用、心臟不良事件及病死率將顯著增加,生活質(zhì)量也將受到嚴(yán)重影響[3]。有研究表明,高密度脂蛋膽固醇(high-density lipoprotein cholesterol, HDL-C)不但具有顯著的心血管保護(hù)作用,還可明顯改善缺血所致的急性腎損傷[4-6]。遺憾的是,HDL-C與冠心病患者經(jīng)皮冠狀動(dòng)脈介入術(shù)(percutaneous coronary intervention, PCI)后CI-AKI關(guān)系如何,國(guó)內(nèi)外鮮有報(bào)道。因此,本研究將就低水平HDL-C是否為CI-AKI的危險(xiǎn)因素進(jìn)行探討。

        1 資料與方法

        1.1 一般資料

        選取天津市胸科醫(yī)院心內(nèi)科2009年1月至2011年5月行PCI術(shù)的冠心病患者共1500例,于術(shù)前及術(shù)后72 h內(nèi)測(cè)定其血肌酐水平。入選標(biāo)準(zhǔn):均為漢族人群, 年齡及性別不限;排除標(biāo)準(zhǔn):既往有惡性腫瘤、泌尿系統(tǒng)感染、腎臟切除手術(shù)、腹膜或血液透析治療或術(shù)前兩周內(nèi)曾應(yīng)用過(guò)對(duì)比劑。

        1.2 治療方案

        入選患者接受如下標(biāo)準(zhǔn)水化治療方案:PCI術(shù)前12 h及術(shù)后以1 mL/(kg·h)靜脈點(diǎn)滴0.9%生理鹽水各持續(xù)約12 h。對(duì)于左室射血分?jǐn)?shù)(left ventricular ejection fraction, LVEF)< 50%者,則減為0.5 mL/(kg·h)。行急診PCI術(shù)者入院時(shí)即應(yīng)用水化治療。同時(shí),所有患者PCI術(shù)中應(yīng)用的對(duì)比劑均為碘克沙醇320(商品名 visipaque, 瑞典安盛公司)。術(shù)前均給予阿司匹林300 mg、氯吡格雷300 mg作為負(fù)荷劑量;PCI后給予低分子肝素0.4~0.6 mL/12 h,皮下注射5~7 d,阿司匹林100 mg/d、氯吡格雷75 mg/d,服用1年。

        1.3 資料收集

        1.3.1 臨床資料 年齡、性別、體質(zhì)量指數(shù)、吸煙史、心肌梗死病史、糖尿病、貧血、LVEF、PCI術(shù)類型(急診或擇期)、慢性腎臟疾病(chronic kidney disease, CKD)、利尿劑、鈣離子拮抗劑、β受體阻滯劑、ARB/ACEI等藥物的應(yīng)用及對(duì)比劑劑量等。

        1.3.2 生化指標(biāo) 術(shù)前及術(shù)后24~72 h 血肌酐、術(shù)前腎小球?yàn)V過(guò)率(estimated glomerular filtration rate, eGFR)、血常規(guī)、血糖、纖維蛋白原、血尿酸及血脂等。

        1.4 診斷標(biāo)準(zhǔn)

        1.4.1 CI-AKI 使用對(duì)比劑后24~72 h內(nèi),血肌酐水平較原有基礎(chǔ)升高25%或者絕對(duì)值升高44.2 μmol/L以上,并排除其他影響腎功能原因。

        1.4.2 低水平HDL-C HDL-C <1.04 mmol/L;CKD:eGFR<60 mL/(min·1.73 m2),eGFR[mL/(min·1.73 m2)]= 186.3×(血肌酐/88.4)-1.154×年齡-0.203×(1 男性;0.742 女性);糖尿病:具有典型癥狀,空腹血糖>7.0 mmol/L或餐后血糖>11.1 mmol/L;超重:體質(zhì)量指數(shù)>25 kg/m2;高尿酸血癥:入院時(shí)血尿酸含量測(cè)定在男性或絕經(jīng)后女性>420 μmol/L或在未絕經(jīng)女性>350 μmol/L。

        1.5 統(tǒng)計(jì)學(xué)方法 采用SPSS 10.0統(tǒng)計(jì)軟件進(jìn)行統(tǒng)計(jì)學(xué)分析。計(jì)量資料采用(x±s)表示,計(jì)數(shù)資料采用例(%)表示。計(jì)量資料間比較采用獨(dú)立樣本t檢驗(yàn),計(jì)數(shù)資料采用χ2檢驗(yàn)。應(yīng)用多元Logistic回歸分析確定CI-AKI及低水平HDL-C的危險(xiǎn)因素,以P<0.05為差異具有統(tǒng)計(jì)學(xué)意義。

        2 結(jié)果

        2.1 低水平HDL-C組與正常水平HDL-C組基本資料比較

        與正常水平HDL-C組相比,低水平HDL-C組在超重、吸煙史、心肌梗死病史、LVEF< 50%、貧血等方面具有較高比例,差異具有統(tǒng)計(jì)學(xué)意義(P<0.05)。而在年齡、性別、糖尿病、CKD、急診PCI、鈣離子拮抗劑、β受體阻滯劑、ARB/ACEI、對(duì)比劑應(yīng)用劑量、高尿酸血癥、術(shù)前血肌酐、血糖、纖維蛋白原、甘油三酯、低密度脂蛋白膽固醇以及總膽固醇等方面,兩組間差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05),結(jié)果見(jiàn)表1、表2。

        3 討論

        冠心病患者PCI術(shù)后CI-AKI的發(fā)生并不少見(jiàn),其發(fā)病率在普通人群約為15% [3,7],而腎功能不全者則可高達(dá)27%[8]。本研究入選了1500例行PCI術(shù)的冠心病患者,其發(fā)病率為16.4%,提示CI-AKI在該類患者中普遍存在,需引起臨床醫(yī)生高度重視。目前,對(duì)于PCI術(shù)后CI-AKI的發(fā)生尚無(wú)特殊有效的治療方法。因此,探明其危險(xiǎn)因素、篩選高危人群并進(jìn)行積極預(yù)防以降低發(fā)病率則顯得至關(guān)重要。

        HDL-C是一類由多種載脂蛋白、脂質(zhì)成分、相關(guān)酶類等組成的異質(zhì)性脂蛋白顆粒,主要介導(dǎo)細(xì)胞膽固醇逆向轉(zhuǎn)運(yùn),可直接抑制動(dòng)脈粥樣硬化形成。近期研究表明,HDL-C還具有抗炎、抗氧化作用,在缺血/再灌注引起的急性腎損傷中也具有腎保護(hù)作用[6,9]。本研究發(fā)現(xiàn),在行PCI術(shù)的冠心病患者中,低水平HDL-C組與正常水平HDL-C組相比CI-AKI發(fā)病率顯著增高。進(jìn)一步分析發(fā)現(xiàn),伴有CKD者,CI-AKI發(fā)病率在低水平HDL-C組與正常水平HDL-C組分別為39.8%和26.5%(P<0.05),而在不伴有CKD者分別為17.7%和9.7%(P<0.01),差異均具有統(tǒng)計(jì)學(xué)意義。可見(jiàn),無(wú)論是否伴有CKD,低水平HDL-C組PCI術(shù)后CI-AKI的發(fā)生率均顯著增高。經(jīng)多元回歸分析證實(shí),同年齡>75歲、心肌梗死病史、糖尿病、貧血、心功能不全、CKD及對(duì)比劑劑量 >200 mL等致病因素一樣,低水平HDL-C也是PCI術(shù)后CI-AKI發(fā)生的危險(xiǎn)因素。另外,從表1不難發(fā)現(xiàn),低水平HDL-C組與正常水平HDL-C組相比,有心肌梗死病史、LVEF<50%及貧血者比例較高,而這些因素經(jīng)多元回歸分析證實(shí)或文獻(xiàn)報(bào)道均為CI-AKI的危險(xiǎn)因素[10-12]。由此可見(jiàn),危險(xiǎn)因素的增多也是低水平HDL-C組CI-AKI發(fā)病率增高的重要原因[13-15]。

        實(shí)驗(yàn)研究顯示,HDL-C可以如下途徑改善腎功能:(1)通過(guò)膽固醇的逆轉(zhuǎn)運(yùn)來(lái)抑制腎血管的動(dòng)脈粥樣硬化及脂質(zhì)對(duì)腎細(xì)胞的直接毒性作用;(2)阻止脂蛋白的累積以減少低密度脂蛋膽固醇與腎小球系膜細(xì)胞受體的結(jié)合以及腎間質(zhì)的生成[16];(3)抗氧化作用[17];(4)抑制細(xì)胞反應(yīng)性氧基團(tuán)的生成[18];(5)抑制黏附因子的表達(dá)以減少多形核白細(xì)胞對(duì)腎組織的浸潤(rùn)及氧化應(yīng)激反應(yīng)[19]。不難理解,由于低水平HDL-C可造成其腎保護(hù)作用下降,CI-AKI發(fā)生率可顯著增高。

        據(jù)報(bào)道,在普通人群,吸煙者的血漿HDL-C水平明顯減低,吸煙是低水平HDL-C的獨(dú)立預(yù)測(cè)因子[20-21]。本研究顯示,吸煙也是冠心病患者低水平HDL-C的預(yù)測(cè)因子。除了吸煙以外,超重及貧血也是低水平HDL-C的預(yù)測(cè)因子。Lo等[22]也發(fā)現(xiàn),無(wú)論是否伴有CKD,血漿HDL-C水平均與體質(zhì)量指數(shù)負(fù)相關(guān),體質(zhì)量指數(shù)越高發(fā)生低水平HDL-C的可能性越大。至于貧血與低水平HDL-C的關(guān)系,尚需進(jìn)一步深入探究。

        總之,與HDL-C水平正常者相比,低水平HDL-C者PCI術(shù)后CI-AKI的發(fā)病率顯著升高?;貧w分析表明,無(wú)論是否伴有CKD,低水平HDL-C均是冠心病患者PCI術(shù)后CI-AKI發(fā)生的危險(xiǎn)因素。超重、吸煙及貧血是該類患者低水平HDL-C的預(yù)測(cè)因子。

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        (收稿日期:2014-04-15)

        (本文編輯:邵菊芳)

        P1018-1022

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