0.05). Conclusion The sinus node arteries can generally be found by angiography. There is no significant relationship between coronary artery diseases of sinus node and sick sinus syndrome.

Objective To investigate the coronary angiography characteristics of acute myocardial infarction (AMI) combined with diabetes mellitus (DM). Methods Forty-five AMI patients combined with DM and 45 AMI patients without DM all received coronary angiography and the results were compared retrospectively, then the differences of coronary angiography and electrocardiogram characteristics were analyzed. Results The ratio of triple vessel lesions and diffuse lesions of coronary artery were more higher in AMI patients combined with DM than those in AMI patients without DM [64.4%(29/45) vs 35.6%( 16/45) and 82.2%(37/45)vs 40.0%(18/45),P< 0.05]. Non-ST segment elevation myocardial infarction (NSTEMI) was more common seen in AMI patients combined with DM than that in AMI patients without DM [37.8% (17/45)vs 17.8% (8/45),P<0.05]. Conclusion AMI patients combined with DM often have NSTEMI with triple vessel lesions and diffuse lesions of coronary artery.

Objective To study the relative factors of hypotension after recanalization of infarction related artery(IRA) during emergency PCI for patients with acute myocardial infarction.Methods We retrospectively analyzed the clinical information and the coronary angiograph of 245 consecutive patients with primary acute myocardial infarction undergoing emergency PCI at the first affiliated hospital of China Medical University from January 2003 to September 2006.Twenty seven patients with blood pressure elevated higher than 140/90 mm Hg after reperfusion were excluded.The remaining 218 patients were catagorized into the hypotension group(BP≤90/60 mm Hg,n=102) and the normal blood pressure group(n=116) according to the blood pressure level after reperfusion during emergency PCI.The relative factors of hypotension were analyzed through logistic regression test.Results Compared with the normal blood pressure group,patients in the hypotension group had higher incidences of old age(age ≥60 yrs),heart failure(killip grades≥grade 2),inferior wall or right ventricular infarction,right coronary artery lesions,proximal or total occlusion lesions,multivessal disease and TIMI blood flow≤grade 1 in the IRA after recandization.Mortality rate was also higher in the hypotension group(P1).Conclusion Old age(age ≥60),inferior wall infarction,killip grades≥2,right coronary artery lesions,proximal or total occlusion lesions are the risk factors of hypotension after recanalization of IRA during emergency PCI.The presence of hypotension is correlated with the increase of in hospital mortality.

Objective To investigate the clinical value of the intra-cronary interventional techniquein the treatment of coronary heart disease. Methods The 110 patients with coronary heart disease weretreated with 63 balloon angioplasties and 47 coronary-stent implantations. Results The ballloon angioplasty was made in 94 coronary lesion arteries with success of 88 vessels. In the following up periods of2-72 months, the angina pectoris and acute myocardial infarction were occurred respectively in 11 and2 cases (24.07 % ). The 63 stems were implanted into 59 coronary lesion arteries with success of 58 vessels. All patients were followed up for 2~12 months and the angina pectoris were occurred in 6 cases(13.3 % ). Conclusion The intracoronary intervetional technique was an effective method for treatmentof the coronary heart disease.

Objective To evaluate the left ventricular function in patients with different extents of coronary stenosis by the left ventricular pressure volume loop Methods In 65 patients who were undergoing coronary angiography and left ventriculography examinations, materials of clinical and cardiac catheter examinations were collected In right anterior oblique 30 degrees the left ventriculography was progressed The pressure curves of the left ventricle and the aorta were recorded continuously and volumes of the left ventricles were measured with the dot tracing method Pressure volume loop was set up and ventricular energy indexes embodied by the pressure volume loop were measured and calculated Results In normal group, pressure volume loop was located in the left and lower portion of the coordinate system Along with the levels of the coronary stenosis becoming more severe, pressure volume loops moved to the right and upper portion of the coordinate system Little changes occurred in ejection fraction except that there was a decreasing in patients with lesions of three branches; Stroke work showed no obvious changes; Filling energy became larger; Total energy increased obviously in both groups with lesions of double branches and three branches; End systolic energy increased gradually while energy efficiency decreased gradually Conclusion The ventricular pressure volume loop can be obtained in routine ventriculography which can reflect many indexes of ventricular function quantitatively The ventricular energy indexes change correspondingly with coronary artery lesions and may be useful to assess ventricular function in patients with different levels of coronary stenosis

Objective To investigate the effects of local delivery c-myc antisense oligodexynucleotides on neointimal hyperplasia after angioplasty in rabbits. Methods The celiac arterial endothelium of 75 male Japanese white rabbit (2.5?0.5 kg) were denuded after being fed with cholesterol-supplemented diet to establish the model of atherosclerotic stenosis of celiac arteries. The animals were randomized into the antisense DNA group (Group Ⅰ), sense DNA group (Group Ⅱ), saline control group (Group Ⅲ) and simple angioplasty group (Group Ⅳ). The drugs were injected intramurally using a porous balloon. The local vessels were collected at the 24 th hour and the 4 th week after the procedure for morphological observation. C-myc mRNA level was measured by means of RT-PCR and c-myc protein with immunohistochemical staining. Results RT-PCR showed that c-myc mRNA level in Group Ⅰ was lower than that of Group Ⅱ, Group Ⅲ and Group Ⅳ after the first 24 hours. The ratio of neointimal area (NEA) to medial area (MA) and NEA/MA in Group Ⅰ were significantly less than those of Group Ⅱ, Group Ⅲ and Group Ⅳ. Immunohistochemical staining showed that the percentage of c-myc protein positive cells was less in Group Ⅰ than those of the other groups. Conclusion Transcatheter local delivery of c-myc antisense oligonucleotides reduces neointimal hyperplasia after angioplasty in rabbits.

Objective To explore the association between estimated glomerular filtration rate (eGFR) based on creatinine and cystatin C and the SYNTAX score in old patients with coronary heart disease. Methods Two hundred and fifty-six consecutive old patients with coronary heart disease were included in this study. The patients were angiographically diagnosed with coronary heart disease between January 2013 and April 2014 at the Department of Cardiology.eGFR was caculated by using BIS2 equation based on creatinine and cystatin C.SYNTAX score was caculated by SYNTAX score algorithm. Multiple linear regression and ordinal logsitic regreesion was used to analyze the association between eGFR and SYNTAX score. Results In patients with normal of renal function [eGFR≥90 ml/(min·1.73 m2), 110 patients], mild renal insufficiency [60 ml/(min · 1.73 m2) ≤ eGFR<90 ml/(min · 1.73 m2), 98 patients], midrange and severe renal insufficiency[eGFR<60 ml/(min · 1.73 m2), 48 patients], with the decrease in renal function of patients, SYNTAX score increased: (15.42 ± 9.65), (25.24 ± 8.34), (33.73 ± 10.15) scores, P<0.01. eGFR was an independent predictor of SYNTAX score (r=-0.059, P<0.01).eGFR was negatively correlated with SYNTAX score (r=-0.457, P<0.01). Conclusions eGFR is an independent predictor of SYNTAX score and negatively correlated with SYNTAX score in old patients with coronary heart disease. This might be helpful to explain the increased risk of coronary heart disease events and mortality in old patients with renal dysfunction.

Purpose To investigate the responsiveness of intracellular oxygen free radical and calcium on acrolein exposure and acrolein-induced cardiomyocytes apoptosis. Methods The viable adult mice cardiac myocytes were isolated by modified langendorff methods. We have examined the intracellular oxygen free radical and calcium concentration using DCF and Fura-2 AM, and the cardiomyocytes viability with WST assay. Are evaluated the DNA ladder pattern and cell apoptotic morphology on the adult mice cardiomyocytes that are exposed to acrolein. Results Our results show that acrolein can increase markedly the intracellular oxygen free radical and calcium concentration, that reach 12 fold and twofold respectively compared to the resting value when the cells were exposed to 1 μmol/L of acrolein. Moreover, the injury induced by acrolein in cardiac myocytes is concentration-dependent. The cardiomyocytes viability treated with 25, 50, 100 μmol/L of acrolein respectively were significantly lower compared to controls (P ＜ 0.01 ). DNA ladder pattern and apoptotic morphological changes were found after being exposed to acrolein in the adult mice cardiomyocytes. Conclusion It is concluded that acrolein induces adult mice cardiomyocytes apoptosis, and it may be due to the increased intracellular oxygen free radicals and calcium concentration.

Objective To investigate the effect and mechanism of different high concentrations glucose(Glu) on the expression of hypoxia-inducible factor 1α(HIF-1α) in cultured neonatal rat eardiomyocytes under hypoxia and non-hypoxia conditions. Methods Neonatal rat cardiomyocytes were cultured for 6 hours under different conditions and were divided into 6 groups:①Negative control group (5.5 mmol/L Glu) ; ②hypoxia mimicking cobalt chloride(Cocl_2) group(5.5 mmol/L Glu + 400 μmol/L cocl_2 ) ;③Different high concentrations Glu groups: (11.1 mmol/L, 22.2 mmol/L, 33.3 mmol/L Glu);④cocl_2 +different high concentrations Glu groups(11.1 mmol/L Glu +400 μmol/L cocl_2,22.2 mmol/L Glu +400 μmol/L cocl_2, 33.3 mmol/L Glu+400 μmol/L cocl_2);⑤High concentrations Glu + antioxidant α-tocopherol group(33.3 mmol/L Glu + 100 μmol/L α-tocopherol) ; ⑥ High concentrations Glu+antioxidant α-tocopherol+cocl_2 group(33.3 mmol/L Glu+400 μmol/L cocl_2+100 μmol/L α-tocopherol). The effect of high concentrations Glu, cocl_2 and high concentrations Glu plus cocl_2 on the expression of HIF- 1α mRNA and protein in cultured neonatal rat cardiomyocytes, as well as the effect of high concentrations Glu plus antioxidant α-tocopherol, high Glu concentrations plus cocl_2 and antioxidant α-tocopherol on the expression of HIF- 1α mRNA and protein were observed. Results 1. Compared with negative control group(5.5 mmol/L Glu), the 'expression of HIF- 1α was increased under cocl_2 mimicked hypoxia(5.5 mmol/L Glu+400 μmol/L cocl_2, 11.1 mmol/L Glu+400 μmol/L cocl_2 ,22.2 mmol/L Glu+400 μmol/L cocl_2,33.3 mmol/L Glu+400 μmol/L cocl_2). 2. The expression of HIF- 1α was increased gradually after the increasing of Glu concentrations(5.5 mmol/L, 11.1 mmol/L, 22.2 mmol/L and 33.3 mmol/L Glu).3.The expression of HIF-1α was decreased gradually after the increasing of Glu concentrations under certain cocl_2 plus different high concentrations Glu (5.5 mmol/L Glu+400 μmol/L cocl_2, 11.1 mmol/L Glu+400 μmol/L cocl_2, 22.2 mmol/L Glu+400 μmol/L cocl_2,33.3 mmol/L Glu+400 μmol/L cocl_2). 4. Under high concentration Glu plus antioxidant α-tocopherol (33.3 mmol/L Glu+100 μmol/L α-tocopherol) ,the expression of HIF- 1α was less increased than the same high Glu concentration(33.3 mmol/L Glu). 5. Under high Glu concentration plus cocl_2 (33.3 mmol/L Glu+400 μmol/L cocl_2), the expression of HIF- 1α increased less than that of the same high Glu concentration plus antioxidant α-tocopherol and cocl_2 (33.3 mmol/L Glu+400 μmol/L Cocl_2+ 100 μmol/L α-tocopherol). Conclusions High glucose increases the expression of HIF-1α under non-hypoxia, but blunts the expression of HIF-1α under hypoxia in cultured neonatal rat cardiomyocytes. Some mechanisms such as ROS (reactive oxygen species) signal transduction system and oxidative stress may be involved in it.

AIM:To investigate whether minocycline postconditioning protects rat myocardium from ischemia-reperfusion ( I/R ) injury through attenuating poly ( ADP-ribose ) polymerase-1 ( PARP-1 ) excessive activation. METHODS:The left anterior descending coronary artery was ligated for 45 min and then reopened for 2 h to establish the rat model of myocardial ischemia-reperfusion injury.The male Wistar rats ( n =90 ) were randomly divided into sham group, I/R group, low-and high-dose minocycline groups, and 3-aminobenzamide (3-AB, PARP inhibitor) group.The myocardial infarct size was measured by Evans blue and 2,3,5-triphenyltetrazolium chloride ( TTC) staining.The morpho-logical changes of the myocardium were observed with HE staining.The cardiomyocyte apoptosis was detected using in situ TDT-mediated dUTP nick end labeling ( TUNEL) .The level of tumor necrosis factorα( TNF-α) and interleukin 1β( IL-1β) in the serum were measured by ELISA.The content of poly( ADP-ribose) ( PAR) in the reperfused myocardium and peripheral leukocytes were detected by Western blot.RESULTS: Compared with sham group, PAR expression, TNF-αcontent and IL-1βconcentration increased in all other groups.Compared with I/R group, treatment with low and high doses of minocycline and 3-AB significantly reduced the infarct size and myocardial apoptosis.PAR expression, TNF-αcontent and IL-1βconcentration in low-and high-dose minocycline groups and 3-AB group all decreased.No significant difference of the above parameters between high-dose minocycline group and 3-AB group was observed.CONCLUSION: Minocy-cline postconditioning may attenuate myocardial ischemia-reperfusion injury by depressing the activation of PARP-1 in car-diomyocytes and peripheral leukocytes in rats.