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Objective To observe the safety and efficiency of DIVER thrombus aspiration catheter application during percutaneous coronary intervention(PCI) in patients with acute myocardial infarction(AMI)and to evaluate its impacts on the myocardial reperfusion,cardiac function and in-stent restenosis after 9months.Methods A total of 86 cases of ST-segment elevation patients of AMI treated with PCI and confirmed complete occlusion lesion by angiography from November 2008 to December 2010 were randomly divided into two groups:aspiration group(n =43)with DIVER thrombus aspiration cathetcrs were used,and non-aspiration group (n =43).ST-segment recovery within two hours,TIMI grade,the in-hospital adverse major cardiac events,the levels of Pro-BNP,coronary function determined by ultrasound heartbeat graph and the results of coronary angiography after PCI for 9 months were compared between two groups.Results There was significant difference on ST-segment recovery within two hours between these two groups[95.35％(41/43)vs 79.02％(34/43),x2 =11.862,P =0.0006].The incidence of TIMI 3 grade flow was significantly higher,the incidence of TIMI 2(slow flow)and TIMI 0-1(no-reflow)grade flow were much lower in aspiration group than those in non-aspiration group immediately after PCI[TIMI 3:93.02％(40/43) vs 81.40％(35/43),x2 =6.06,P =0.0335 ; TIMI 2:6.98％(3/43) vs 13.95 ％(6/43),x2 =3.12,P =0.0495 ; TIMI 0-1:0 vs 6.98 ％(3/43),x2 =5.29,P =0.0352].There was no difference on LVEF[(0.420±0.054) ％ vs(0.408±0.052)％,t =1.0496,P =0.766and LVEDD(56.5±4.5)mm vs(57.6±4.4)mm,t =1.0419,P =0.7832]between these two groups one day after PCL LVEF was significandy higher in aspiration group than that in non-aspiration group one and nine months after PCI[(0.452±0.050) ％ vs(0.432±0.049) ％,t =3.3957,P =0.0482 ;(0.469±0.053) ％ vs (0.413±0.052)％,t =4.9457,P =0.0336].LVEDD was significantly smaller in aspiration group than that in non-aspiration group one and nine months after PCI[(49.6±5.1) mm vs(53.4±4.6) mm,t =3.4548,P =0.0473 ;(46.5±4.4) mm vs(50.2±4.8) mm,t =3.7260,P =0.0421].There were no cardiovascular events (angina,myocardial infarction,heart failure,cardiac death)in both groups during 9 months follow-up.The coronary angiography results showed that the occurrence rate of in-stent restenosis in aspiration group was significantly lower than that in non-aspiration group(2.33％ vs 6.98％,x2 =4.4351,P =0.0463).Conclusion The application of DIVER thrombus aspiration catheters during PCI in all patients with AMI was safe and effective,it can improve the myocardial tissue perfusion and the post-operative cardiac function and can lower the occurrence rate of in-stent restenosis.
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Introducción: en el contexto del infarto agudo de miocardio con elevación del ST (IAMST), la renivelación del segmento ST es uno de los indicadores de reperfusión luego de una angioplastia primaria (ATC 1º) exitosa. La persistencia del supradesnivel del ST en pacientes en los que se logra la restauración adecuada del flujo coronario epicárdico se vincula a lesión microvascular. Método: se estudió de forma prospectiva a todos los pacientes a quienes se realizó ATC1° exitosa en las primeras 12 horas de un IAMST en el Centro Cardiovascular Casa de Galicia desde el 1 julio del 2009 hasta el 30 de setiembre de 2009. Se consideró como renivelación significativa del ST un descenso mayor o igual a 50% comparando el electrocardiograma (ECG) a 1 hora de la ATC con el ECG previo a la misma. El objetivo principal fue estudiar la asociación entre la persistencia del supradesnivel del ST y los eventos adversos cardiovasculares mayores durante la internación. Resultados: se incluyeron 55 pacientes. Se observó persistencia del supradesnivel del ST en 27,3% (15). No encontramos asociación entre la no renivelación y los eventos por separado, pero sí entre la no renivelación y el end point combinado. La incidencia acumulada de eventos en pacientes que no renivelan es de 46,6% vs 17,5% en los que renivelan; RR 2,67 (IC: 95% 1,12-6,32), chi cuadrado (Mantel Haenszel) 4,80, p = 0,028. Conclusiones: la persistencia del supradesnivel del ST post ATC1° exitosa, tiene implicancia pronóstica en cuanto a complicaciones cardiovasculares intrahospitalarias de los pacientes con IAMST.
Introduction: in the context of acute myocardial infarction with ST elevation, the recovery of ST segment is a reperfusion indicator after a successful primary angioplasty (PCI). Persistent ST segment elevation in patients who achieved adequate restoration of epicardial coronary flow is related to microcirculation injury. Methods: we prospectively studied all patients who underwent successful PCI in the first 12 hours of an infarction with ST elevation in Casa de Galicias Cardiovascular Center since 1 July 2009 to 30 September 2009. It was considered significant a ST recovery greater than or equal to 50% comparing the electrocardiogram (ECG) 1 hour after PCI with ECG prior to it. The main objective was to study the association between persistent ST segment elevation and major adverse cardiovascular events during hospitalization. Results: 55 patients were included. There was persistence of ST elevation in 27.3% (15). No association was found between ST persistence and events separately, but it was found association between the persistence and the combined end point. The cumulative incidence of events in patients without ST significant recovery is 46.6% versus 17.5% in those with ST recovery; RR 2,67 (CI 95% 1.12 to 6.32), Chi2 (Mantel Haenszel) 4.80 p = 0.028. Conclusions: the persistence of ST segment elevation after successful PCI has prognostic implication in terms of in-hospital cardiovascular complications in patients with acute myocardial infarction with ST segment elevation.
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Humans , Angioplasty , Myocardial Infarction/surgery , Hospital Mortality , Prognosis , ReperfusionABSTRACT
Objective To find the factors lowering the rate of effective thrombus aspiration in patients with STsegment elevation acute myocardial infarction (STEMI) treated with primary percutaneous coronary intervention(PCI). Method From January to December 2008 , a total of 226 AMI patients from Beijing Anzhen Hospital,treated with primary PCI to aspirate the thrombus from the infracted coronary artery via a cannula, were enrolled in a single center retrospective study. The criterion of successful thrombectomy (device success) was defined as the coronary blood flow of involved vessel after PCI resumed to greater than TIMI grade 1. One hundred seventy-eight patients were assigned to effective thrombus aspiration group, and 48 patients without improvement in coronary blood flow of involved vessel after PCI to control group. Data collected after PCI including the normalization of the elevated ST segment,the use of direct stent, ratio of no-flow/slow flow, intra-coronary administration of Tirofiban and the rate of thrombolysis in myocardial infarction (TIMI) flow grade 3 were analyzed with logistic analysis soas to find out the factors affecting the efficacy of thrombus aspiration. Results There were no significant differences in data before PCI between two groups ( P ＞0.05). Compared with the control group, the factors studied such as smoke, diabetes, the rate of pre-PCI TIMI flow grade 0,the post-PCI ratio of no-reflow/slow flow,and the intra-coronary administration of Tirofiban were fewer significantly in the effective thrombus aspiration group. And the rate of post-PCI TIMI flow grade 3, and the rate of direct stent were higher in the effective thrombus aspiration group. Logistic analysis showed that smoke ( OR = 1.551,95%CI: 1.018 ～ 2. 154, P = 0.012), diabetes ( OR = 1. 132,95%CI:0.276 ～ 3.562, P =0.044), and pre-PCI TIMI flow grade 0 OR = 0.544,95%CI:0.368 ～ 1.911,P = 0.035) were independent factors of effective thrombus aspiration. Conclusions Effective thrombus aspiration may improved the coronary blood flow to TIMI flow grade 3 after PCI and reduce the impaiment of myocardial perfusion, and the factors affecting the efficacy of thrombus aspiration should be paid more attention to and should be minimized to achieve the better clinical outcomes.