Self-management of coronary heart disease in older patients after elective percutaneous transluminal coronary angioplasty

Objective To explore how older patients self-manage their coronary heart disease （CHD） aider undergoing elective percutaneous transluminal coronary angioplasty （PTCA）. Methods This mixed methods study used a sequential, explanatory design and recruited a convenience sample of patients （n = 93） approximately three months after elective PTCA. The study was conducted in two phases. Quantitative data collected in Phase 1 by means of a self-administered survey were subject to univariate and bivariate analysis. Phase 1 findings in- formed the purposive samplhag for Phase 2 where ten participants were selected from the original sample for an in-depth interview. Qualita- tive data were analysed using thematic analysis. This paper will primarily report the findings from a sub-group of older participants （n = 47） classified as 65 years of age or older. Results 78.7% （n = 37） of participants indicated that they would manage recurring angina symptoms by taking glyceryl trinitrate and 34% （n = 16） thought that resting would help. Regardless of the duration or severity of the symptoms 40.5% （n = 19） would call their general practitioner or an emergency ambulance for assistance during any recurrence of angina symptoms. Older participants weighed less （P = 0.02） and smoked less （P = 0.01） than their younger counterparts in the study. Age did not seem to affect PTCA patients＇ likelihood of altering dietary factors such as fruit, vegetable and saturated fat consumption （P = 0.237）. Conclusions The findings suggest that older people in the study were less likely to know how to correctly manage any recurring angina symptoms than their younger counterparts but they had fewer risk factors for CHD. Age was not a factor that influenced participants＇ likelihood to alter lifestyle factors.

Response of blood pressure after percutaneous transluminal renal artery angioplasty and stenting

AIM: To evaluate the short and intermediate term out-come of percutaneous transluminal renal artery angioplasty (PTRA) and stenting particularly on blood pressure (BP) control and renal function and to evaluate predictors of poor BP response after successful PTRA and stenting. METHODS: We conducted a prospective analysis of all patients who underwent PTRA and stenting in our institute between August 2010 to September 2012. A total number of 86 patients were underwent PTRA and renal stenting. Selective angiography was done to confirm at least 70% angiographic stenosis. The predilatation done except few cases with critical stenosis, direct stenting was done in the rest of cases. All patients received aspirin 325 mg orally, and clopidogrel 300 mg orally within 24 h before the procedure. Heparin was used as the procedural anticoagulant agent. Optimal results with TIMI-Ⅲ flow obtained in all cases. Following stent placement, aspirin 150 mg orally once daily was continued for a minimum of 12 mo and clopidogrel 75 mg orally once daily for at least 4 wk. The clinical, radiological, electrocardiography, echocardiography and treatment data of all patients were recorded. The BP measurement, serum creatinine and glomerular filtration rate (GFR) were recorded before the procedure and 1 and 6 mo after PTRA. RESULTS: A total of 86 patients were included in the study. The mean age of study population was 55.87±11.85 years old and 67 (77.9%) of patients were male. There was a significant reduction in both systolic and diastolic BP at 1 mo after the procedure: 170.15±20.10 mmHg vs 146.60±17.32 mmHg and 98.38±10.55 mmHg vs 89.88±9.22 mmHg respectively (P=0.0000). The reduction in BP was constant throughout the follow-up period and was evident 6 mo after the procedure: 144.23±18.19 and 88.26±9.79 mmHg respectively (P=0.0000). However, no improvement in renal function was observed at any time during the follow-up period. After multivariate analysis, we found male sex, low GFR (<60 mL/min) and higher baseline mean BP as a poor predictors of successful outcome on BP response after PTRA and stenting. CONCLUSION: The PTRA and stenting can be considered as an effective therapeutic intervention for improving BP control with minimal effect on renal function. The male sex, higher baseline BP and low GFR are associated with poor BP response after successful PTRA and stenting.

Clinico-Angiographic Profile and Prevalence of Restenosis in Patients Undergoing Percutaneous Transluminal Coronary Angioplasty to Left Main Coronary Artery: An Observational Cohort Study

Background: Patients who underwent percutaneous coronary intervention in left main coronary artery (LMCA) requires special concern, being high risk and increasing patient population. The aim of this study was to assess the clinical profile, angiographic status, and prevalence of restenosis in patients who underwent percutaneous transluminal coronary angioplasty (PTCA) in LMCA. Materials and Methods: This observational cohort study included 17 patients who underwent PTCA in LMCA during one-year study period at tertiary care centers in Government Medical College, Kozhikode, India. Data including various risk factors, clinical and angiographic details, stent used, procedural complications and outcomes including rate of restenosis were analyzed. Results: A total of 17 patients (mean age 53.88 ± 9.80 years) with 76.47% of males were included in the study. Smoking and hypertension were the most common risk factors presented in 52.94% and 47.06% of patients respectively. Single vessel disease (SVD) of LMCA was the most common pattern observed in 47.10%;the rate of restenosis was observed in 11.76% patients. Revascularization was performed in one patient (5.88%) with coronary artery bypass graft and in one patient (5.88%) with PTCA using drug eluting stent (DES). The overall procedural success was 88.24% in this study. Survival rate was 100% at one-year follow-up period. Conclusion: Our study involved patients who underwent PTCA in LMCA, showed smoking as a most prevalent risk factor for coronary artery disease and SVD as a most common pattern, comparatively low rate of restenosis and 100% of survival rate at one-year follow-up period.

Study of Traditional Chinese Medicine in Intervening Vascular Remodeling after Percutaneous Transluminal Coronary Angioplasty

Interventional therapy of coronary heart disease (CHD) includes percutaneous transluminal coronary angioplasty (PTCA), stent implantation etc. Owing to its revascularization without cardiac surgery, it has been the main effective method in treating CHD. But at the same time, there exists the problem of restenosis (RS). After PTCA, RS

CLINICAL APPLICATIONS OF PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY

Percutoneous transiuminal coronary anginplesty(PTCA)was performed in33 patients of coronary heart diseases(male 30 cases,female 3 cases, meanage 54.2) with Gruentzig’s method.Of all the 33 patients,there were 26narrow parts in 20 cases of the single branch lesions,27 narrow parts in 11cases of the double branch lesions and 11 narrow parts in 2 cases of thethree branch lesions.In 48 branches with lesion vessels,there were 27branches of the left anterior descending coronary arteries (LAD),7 branchesof the left cicumflex coronary arteries(LCX)and 13 branches of the rightcoronaw arteries.The narrow degrees varied from 75% to 100%. The resultswere that,of 33 patients,48 branches of lesion vessels and 64 narrow parts,the successful rates of dilation were 96.9%,87.5%,85.9%,respectively.Ventricular fibrillation occurred in one case during the procedure,whichsoon recovered sinus rhythm through cardioversion.Symptoms of thesuccessful 32 patients were lmproved obviously or diappeared after PATC.Combining with the documents,we think that the successful rates are higherin type A lesion undergoing PTCA.When PTCA for the multiple branchlesions are performed,we ought to master the principle of dilating the mainlessinos in advence.The long-tube lesions were dilated by the long balloonfitting for these lesions.The causes of failure of PTCA in the severe narrowlesions are mainly the the guilding wires or the balloon catheters cann’t passthrough the lesion parts,in addition,the complication problems in PTCA arealso discussed.

Amiodarone-induced bronchiolitis obliterans organizing pneumonia in patient following percutaneous transluminal coronary angioplasty

Background: Many patients are affected by idiopathicbronchiolitis obliterans organizing pneumonia (BOOP). There are several known causes of BOOP, and several systemic disorders have BOOP as an associated primary pulmonary lesion. Numerous agents including cytotoxic and noncytotoxic drugs have the potential to cause pulmonary toxicity. Descriptions of amiodarone-related BOOP continue to be reported throughout the world. Case Report: We reported a patient with original clinical presentation who developed recurrent sustained ventricular tachycardia (SVT) despite the presence of implantable cardioverter-defibrillator (ICD), hypoxaemia and interstitial pneumonitis in both lung bases. After percutaneous transluminal coronary angioplasty, he developed bronchiolitis obliterans organizing pneumonia (BOOP). Conclusions: To our knowledge, such complications after percutaneous coronary procedure in patients with amiodarone therapy for arrhythmia prophylaxis, are not very frequent in literature.

CHANGES AND SIGNIFICATION OF SERUM CPK BEFORE AND AFTER PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY IN PATIENTS WITH CORONARY HEART DISEASES

To study the damage effect of percutaneous transfuminalcoronary angioplasty(PTCA)on myocardium,wedetermined the serum CPK and CPK-MB level in 35 casesof patients with coronary henrt disease(CHD)beforePTCA and at 6th,12th,24th hour,2nd,3rd day afterPTCA.The results showed that after PTCA,the serumCPK and CPK-MB in 21 of 35 case of patients wised at12th hour.2nd day reached the peak level.But comparedwith others,it has no significant different(P】0.05).TheCPK and CPK-MB decreased to normal level at 3rd day.Itis suggested that PTCA has no significant damage effect onmyocardium.

Clinical Application of Percutaneous Transluminal Angioplasty and Stent Implantation in Acute Lower Extremity Deep Venous Thrombosis

Purpose: To analyze the application of percutaneous transluminal angioplasty and stenting in acute deep venous thrombosis of lower extremities. Methods: 70 patients were divided into two groups according to the presence or absence of percutaneous transluminal angioplasty and stenting. Results: The mean circumferential diameter difference between the affected limbs and the healthy limbs and the knees at 15 cm was statistically significant. The cure rate and effective rate of the research group were higher than those of the control group (P<0.05). Conclusion: Percutaneous transluminal angioplasty and stenting are of high value in acute lower extremity deep venous thrombosis.

COMPLEX PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY

Percutancous transluminal coronary angioplasty was pcrfonned in 70patients with high risk characteristics from Jan.1998 toDcc.1997 These factors include age】70(10patients),unstableangina(35patients),ejection fraction【40%(7 patients),multivesseldisease(50patients).There were 96 lesions(79 vessels)dilated,amongthem type Alesion 15,type B lesion 52,type C lesion 29.Autoperfusion balloon was used in 7 patients, coronary stcnl wasimplantcd in 50 paticnts.One patient undcrgoing directional coronaryathrectomy(DCA).The clinical success rate was 91.5% and lesionsuccess rate was 89.6%.Average predilation stenosis was 89.5+8.2%and average postdilation stenosis was 16.9+6.2%.Two patients diedfrom abrupt vessel closureno acule myocardial infarction andemergency coronary bypass operation.The considerations in selectionand management of these high risk patients were discussed. The resultsshowed that PTCA can be performed safely in the complex cases.

Long Term Clinical and Angiographic Outcome Following Percutaneous Transluminal Angioplasty and Stent Placement for Iliac and Femoral Artery Stenosis

Objective This study reportsthe initial and late results of percutaneous transluminal angioplasty (PTA) and intravascular stenting for atherosclerotic stenosis of the iliac and femoral arteries. Methods and Results From December 1994 to March 1997, we performed iliac and femoral artery angioplasty and primary intravascular stent placement in 37 vessel of 33 patients (19 men and 14 women; mean age, 70. 5 years). A total of 43 self - expanding Wallstents (Boston, Inc. ) were deployed. All patients underwent angioplasty and stent placement successfully. Clinical follow - up was available for all patients at a mean of 26±14months. All patient clinical is-chemic category (claudication or rest pain) was improved. Angiographic follow - up was completed for 17 of 23 patients at a mean follow-up of 10±5 months, The iliac artery restenosis rate was 0(0/8). The femoral artery restenosis rate was 33 % (3/9), All 3 patients underwent repeat balloon angioplasty successfully. Conclusion The iliac and femoral arteries can be performed and reasonable early and late patency rates.

外周血Klotho水平对超声引导下PTA术后AVF再狭窄的预测价值

目的探讨外周血Klotho蛋白对终末期肾脏病(end stage renal disease,ESRD)患者经皮腔内血管成形术(percutaneous transluminal angioplasty,PTA)后发生动静脉内瘘(arteriovenous fistula,AVF)再狭窄的预测价值。方法选取邢台医学高等专科学校第二附属医院行PTA手术的240例ESRD患者为研究对象,随访截止时间为2022年12月,根据是否发生AVF再狭窄分为狭窄组和非狭窄组。检测并比较2组的外周血Klotho水平,分析外周血Klotho与AVF再狭窄的相关性和预测价值,并收集2组的临床资料,进行单因素分析和多元Logistic回归分析,探究VAF再狭窄的独立危险因素。结果狭窄组外周血Klotho显著低于非狭窄组,差异有统计学意义(P<0.05),外周血Klotho与AVF再狭窄呈负相关关系(r=-0.039,P<0.001),外周血Klotho对AVF再狭窄预测的ROC曲线下面积为0.866(95%CI:0.823~0.909),截断值1.35 ng/L。多元Logistic回归分析表明,年龄≥75岁(OR=2.425,95%CI:1.054~5.579)、糖化血红蛋白≥6.5%(OR=2.570,95%CI:1.328~4.975)、血清白蛋白<40 g/L(OR=3.105,95%CI:1.040~9.269)、钙磷乘积>50 mmol/L(OR=3.804,95%CI:1.155~12.524)、Klotho蛋白<1.35 ng/L(OR=2.863,95%CI:1.272~6.446)是ESRD患者PTA术后发生再狭窄的独立危险因素(P<0.05)。结论外周血Klotho水平与ESRD患者PTA术后发生AVF再狭窄具有负相关性,具有较高的预测价值,外周血Klotho水平下降与高龄、糖化血红蛋白水平升高、血清白蛋白水平下降以及钙磷乘积升高是AVF再狭窄的独立危险因素。

Retrospective analysis of percutaneous transluminal coronary angioplasty and coronary stenting

Objective To examine long term efficacy of percutaneous transluminal coronary angioplasty (PTCA),coronary stenting and to assess the factors affecting its efficacy Methods A total of 790 patients who underwent successful PTCA and PTCA+stent in this hospital were followed by direct interview or letter The rate of follow up was 84 2% and the period of follow up was 0 9-12 7 (3 5±2 4) years Results During follow up, 4 (0 5%) patients died, 22 (2 8%) had nonfatal acute myocardial infarction, 10 (1 3%) had coronary artery bypass surgery, and 98 (12 4%) had repeat PTCA The rate of recurrent angina pectoris was 31 1% The cardiac event free survival rate calculated by the Kaplan Meier method was 88 2% at 1 year and 80 6% at 12 7 years Cox regression analysis showed that there was a positive correlation between AMI history, stent implantation and the risk of cardiac events, and there was a negative correlation between the number of diseased arteries and the risk of cardiac events Compared to the PTCA group, patients with PTCA+stent had significantly lower rates of total cardiac events Conclusion The long term efficacy of PTCA, especially PTCA + stent in Chinese patients was very satisfactory, suggesting that PTCA+stent therapy should be the major treatment for revascularization in patients with coronary heart disease

Safety and efficacy of dalteparin in percutaneous coronary intervention in Chinese patients with non-ST-elevation acute coronary artery syndromes： comparison with unfractionated heparin

Objective To prospectively evaluate the safety and therapeutic efficacy ofdalteparin in patients with high risk non-ST- elevation acute coronary syndromes （ACS） during percutaneous coronary intervention （PCI）. Methods A total of 175 patients with high risk non-ST-elevation ACS were randomly assigned to 2 groups [dalteparin group and unfractionated heparin （UFH） group]. The patients in dalteparin group were given dalteparin at a dose of 5,000U subcutaneously soon after diagnosis and then an additional 60U/ kg intravenous bolus ofdalteparin before emergent PCI. Vascular access sheaths were removed immediately after PCI or coronary artery angiography; the patients in UFH group were given UFH intravenously at a dose of 25mg just before PCI and an additional 65mg bolus was administered if angiographic findings showed that the patients were suitable for percutaneous transluminal coronary angioplasty （PTCA）. Sheaths were removed at 4-6 hours after PCI; Results Eighty-three patients in dalteparin group underwent PCI while 82 patients in UFH group underwent PCI; anti-Xa activities of 52 patients in daltepafin group were measured. The average anti-Xa activity was （0. 83± 0.26） U/ml at 15 minutes after intravenous injection of dalteparin and anti-Xa〉0.SU/ml was obtained in 96.1% of the patients; hematomas at puncture sites were significantly fewer in dalteparin group as compared with UFH group （2.3% vs 9.2%, P 〈 0.05）; none of the patients in 2 groups suffered major bleeding events. No death, acute arterial reocclusion or emergent revascularization events occurred at 30 days after PCI. Conclusions Our study demonstrated that early subcutaneous injection ofdalteparin at a dose 5,000U after diagnosis and an additional 60U/kg intravenous bolus ofdalteparin before PCI is safe and efficacious for patients with high risk non-ST-elevation ACS undergoing emergent PCI.

透析动静脉内瘘狭窄PTA术后再狭窄应用高压球囊治疗临床研究

目的探究高压球囊在透析患者动静脉内瘘狭窄行经皮腔内血管成形术(PTA)后再狭窄中的应用价值。方法选取2021年2月至2023年1月我院82例行动静脉内瘘狭窄PTA术后再狭窄患者,电脑随机法分为两组,观察组41例采用高压球囊治疗,对照组41例采用普通球囊治疗。比较两组手术一般情况、手术前后狭窄动静脉血流指标[血管峰值流速、横截面积、阻力指数(RI)]、炎性氧化应激指标[C反应蛋白(CRP)、红细胞分布宽度变异系数(RDW-CV)、超氧化物歧化酶(SOD)、丙二醇(MDA)]、并发症及术后3个月开通率。结果观察组球囊扩张压力高于对照组,球囊扩张次数、住院天数均少于对照组(P<0.05);观察组术后3 d血管峰值流速、RI低于对照组,横截面积大于对照组(P<0.05);术后3 d观察组CRP、RDW-CV、MDA水平低于对照组,SOD水平高于对照组(P<0.05);观察组术后3个月开通率高于对照组(P<0.05);两组并发症发生率间差异无统计学意义(P>0.05)。结论透析患者动静脉内瘘狭窄PTA后再狭窄患者采用高压球囊治疗效果确切,能减少球囊操作次数,提高动静脉开通率,改善狭窄动静脉血流状态,减轻炎性氧化应激反应,促进术后恢复,且具有较高安全性。

CLINICAL APPLICATION OF PERCUTANEOUS BALLOON MITRAL VALVALOPASTY

The operation of PBMV is popular and considecl highlybeacuso of advantages of satisfactory effects andlittle lesion.But there are many difficulties inpractices,such as the balloon can’t be passedthrough the mitral valve eesily.We operated 64patients by the method of big curve in front part ofthe catheter during PBMV and all of the catheterswere passed through the mitral valve in short time,the stenosis valves vere dilated successfully.In myopinion,in order to made a big curve in front partof the catheter,it is vital to change the curve infront part of left ventricular wire according to thesize of left atrium,which can make the catheter havea proper curve to pass the mitral valve.In addition,it is not suitable to puncture the artial ssptum inhigher position,if so,the front part of the catheterin left atrium is parallel or almost parallel to theaitral valve,not in the right angle,so the cathetercan’t be easy to pass through the mitral valve.During the puncturing,the angle of the punctureneedle must be settled properly to reduce thecomplications.We suggest that the degrees of arrowin the puncture needle be set to 45°.60 and 75°separately when the size of left atrium are 4.0cm,5.0cm and 6.0cm.When pueeturing in such degree,thecatheter could be in right angle with the mitralvalve and passed through the valve easily.

Effects of intracoronary arterial injection of tirofiban on no-reflow phenomenon in patients with acute ST-segment elevation myocardial infarction underwent primary percutaneous coronary intervention

Objective: To compare the effect of intracoronary arterial injection of tirofiban and sodium nitroprusside (SNP) on no-reflow phenomenon in patients with acute ST-segment elevation myocardial infarction (STEMI) underwent primary percutaneous coro-nary intervention (PCI). Methods: A total of 68 patients with acute STEMI who had no-reflow phenomenon during PCI were chosen and randomly divided into SNP group (n = 34) and tirofiban group (n = 34). Aiming at no-reflow phenomenon during PCI, with the use of microcatheters, intracoronary arterial injection of tirofiban was given in tirofiban group, while intracoronary bolus of SNP was given in SNP group. Coronary angiography was conducted to record TIMI flow grade of the infarct-related artery after 10 minutes. Plasma brain natriuretic peptide (BNP) was monitored before and after PCI (in 24 hours). With the help of ultrasound cardiogram, left ventricular ejection fraction (LVEF), left ventricular end-diastolic dimension (LVEDD) and left ventricular end-systolic dimension (LVESD) were recorded and compared in 30 days after PCI. Results: The ratio of TIMI grade 3 blood flow in tirofiban group was significantly higher than that in SNP group (76.5% (26/34) vs. 52.9% (18/34), p = .03)BNP levels in two groups had no statistical significance before PCI (p = .16), but in 24 h after PCI, BNP levels in tirofiban group were significantly lower than those in SNP group ((439.00 ± 4.90) μmol/L vs. (632.00 ± 3.63) μmol/L, p = .02)In 30 days after PCI, LVEF, LVEDD and LVESD in tirofiban group were all superior to those in SNP group (all p < .05). Conclusions: Intracoronary arterial injection of tirofiban was superior to SNP in improving no-reflow phenomenon in STEMI patients after PCI in the emergency treatment. Tirofiban therapy can increase coronary blood flow and myocardial perfusion after the occurrence of no-reflow phenomenon during PCI in STEMI patients, and improve long-term prognosis.

PTA治疗慢性下肢动脉硬化闭塞症的疗效及支架内再狭窄的影响因素分析

目的:探究经皮腔内血管成形术(PTA)治疗慢性下肢动脉硬化闭塞症(ASO)的疗效及支架内再狭窄的影响因素。方法:回顾性分析行PTA治疗的97例慢性下肢ASO患者的临床资料,分析不同时间踝肱指数(ABI)、血流动力学指标[足背动脉内径、血流速度峰值、血流量]、血清生化指标[总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、超敏C反应单蛋白(hs-CRP)]变化,1年后随访再狭窄情况并分析相关影响因素。结果:慢性下肢ASO患者术后7 d、6个月、1年ABI、足背动脉内径和血流量均高于术前(P<0.05),血流速度峰值均低于术前(P<0.05);术后1年,ABI均低于术后7 d和6个月(P<0.05),足背动脉内径低于术后7 d(P<0.05),血流速度峰值高于术后7 d(P<0.05);血管再狭窄者31例(31.96%),未狭窄者66例(68.04%);再狭窄组术前ABI、术后1年高密度脂蛋白胆固醇(HDL-C)均低于未狭窄组(P<0.05);植入支架≥2个比率、术前甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、术后1年TG、LDL-C、超敏C反应蛋白(hs-CRP)均高于未狭窄组(P<0.05),植入支架长度大于未狭窄组(P<0.05);术前ABI、TG、LDL-C和术后1年TG、LDL-C、HDL-C、hs-CRP均为下肢ASO患者支架内再狭窄的危险因素(P<0.05)。结论:PTA治疗慢性下肢ASO短期疗效显著,但有术后再狭窄风险,术前ABI、TG、LDL-C,术后TG、LDL-C、HDL-C、hs-CRP水平均为下肢ASO患者支架内再狭窄的危险因素。

EXPERIMENTAL WORK AND RESEAROHThe Experimental Study of Xue Guan Tong (血管通)on Preventing Restenosis after Percutaneous Transluminal Angioplasty

The effect of Xue Guen Tong (XGT) granule in preveriting restenosis of atherosclerotic iliacartery after percutaneous transluminal angioplasty (PTA) in rabbits was studied. Forty-two purebred NewZealand rabbits with their endothelium of iliac arteries denuded and fed with high cholesterol diet for sixweeks to form the model of atheresclerotic stenosis. After PTA, the high cholesterol diet was stopped imme-diately and they were divided into 3 groups randomly. the XGT group, the lovastatin group and the controlgroup. Arterial angiogreph and pathological observation were carried out 4 weeks after PTA. The resultesbewed that ( 1 ) The luminal diameter of artery was 1 . 82 0. 46mm in the XGT group, 0 . 96 0. 71mm in thelovastetin grcxjp and 0. 71 0 . 53mm in the control group. The former one was larger than the latter two sig-nificantly ( P< 0. 01 ) . (2) Thickness of intima of artery was 0 . 27 0 . 40mm in the XGT group, it was thinnerthan those in the other two groups (O. 43 0. 04mm in the lovastatin group arid 0. 48 0. 10mm in the controlgroup) . (3) In XGT group, the smooth muscle cells ( SMCs) contained fewer organelles. more muscular fibersand were well differentiated than in the other two groups. The conclusion was XGT has the preventive effecton past-PTA arterial restenosis in rabbits.

PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY ITS SUCCESS RATE AND AFFECTING FACTORS

From December 1987 to October 1983, percutaneous transluminal coronary angioplasty (PTCA) was performed in 302 patients with 392 diseased vessels and 440 lesions. The success rate was 93.71% in 302 patients, 94.90% in 392 diseased vessels and 95.00% in 440 lesions. The success rate was 98.92% in Type A lesion, 95.71% in Type B lesion, and 86.57% in Type C lesion (A vs B P=NS, A vs C P<0.01). There were 55 lesions with total or subtotal occlusion, the success rate was 89.09% (93.10% in Type B lesion and 84.62% in Type C lesion). As to the diseased vessels, the success rate was 95.65% in LAD, 94.38% in LCX and 93.75% in RCA. The results showed no significant difference. In this series, acute ischemic complications were found in 6.59% (29 / 440). Of these 29 lesions, 23 were treated successfully, 5 developed Q wave myocardial infarction and 1 died.

PERCUTANEOUS TRANSLUMINAL EXCIMER LASER CORONARY ANGIOPLASTY CLINICAL REPORT OF SIX CASES

Six patients with 95% to 100% occluded atheroseleroticlesions underwent percutaneous transluminal excimer lasercoronary angioplasty (PTELCA). Among them, 5 were maleand ! was female; their age ranged from 28 to 66 years. Fourpatients had LAD stenosis and 2 LCX lesions.Acuteangiographic and clinical success was achieved in all patientsbut one, with a success rate Of 83.3%. It was demonstratedthat PTELCA is a safe and effective therapy for selected pa-tients with coronary artery disease.