Comparación de la anastomosis cervical manual versus mecánica en una serie prospectiva de pacientes con esofagectomía por cáncer

Objetivos : La escasa literatura existente sugiere haber una menor tasa de fugas anastomóticas y una menor formación tardía de estenosis después de la anastomosis esofagogástrica con grapas comparada con la técnica de anastomosis manual. El objetivo del presente estudio es comparar los resultados quirúrgicos de la anastomosis cervical manual termino-lateral versus la anastomosis mecánica por grapado laterolateral luego de una esofagectomía transhiatal por cáncer. Materiales y métodos : Se realizó una revisión retrospectiva de los pacientes sometidos a esofagectomía transhiatal con anastomosis manual o mecánica por neoplasia en tres instituciones de Medellín, entre 2011 y 2018. Los criterios de valoración incluyeron la tasa de fuga anastomótica, la morbilidad, la mortalidad, la estancia hospitalaria y anastomóticas identificadas las estenosis por endoscopia que requirieran dilatación. Resultados : se evaluaron 68 pacientes (40 hombres, 59%), 37 con anastomosis manual y 31 con anastomosis mecánica con características demográficas similares. Se produjeron fugas anastomóticas en 13 pacientes (19,1%), sin encontrarse una diferencia entre la anastomosis manual y mecánica (18,9 frente a 19,3%; p = 0,93). La morbilidad global (61%), la mortalidad intrahospitalaria (3%) y la duración de la estancia hospitalaria (mediana de 12 días) no se vieron afectadas por la técnica anastomótica. Se dispuso de una evaluación endoscópica de seguimiento en todos los pacientes y se detectó una estenosis anastomótica asociada o no a fugas de la anastomosis en 18 pacientes (22%), los casos de estenosis sin fuga fueron más frecuente con la técnica de anastomosis manual que la mecánica (21,6 vs 6,4%; p=0,07) con una duración mayor del procedimiento quirúrgico en caso de la anastomosis manual (p=0,05). Conclusiones : Nuestro estudio no aleatorizado sugiere que la técnica de anastomosis mecánica cursa con un tiempo quirúrgico menor y una menor tasa de estenosis que la anastomosis manual en la reconstrucción esofagogástrica cervical tras la esofagectomía transhiatal, con una tasa de fuga anastomótica, estancia hospitalaria y morbimortalidad similares.

Objectives : The scarce existing literature suggests having a lower rate of anastomotic leakage and less late stricture formation after stapled esophagogastric anastomosis compared to the manual anastomosis technique. The aim of the present study is to compare the surgical outcomes of termino-lateral manual cervical anastomosis versus mechanical anastomosis by later lateral stapling, after transhiatal esophagectomy for cancer. Materials and methods : A retrospective review of patients undergoing transhiatal esophagectomy with manual or mechanical anastomosis for neoplasia was performed at three institutions in Medellin, between 2011 and 2018. Endpoints included leak rate, morbidity, mortality, hospital stay, and endoscopically identified anastomotic strictures requiring dilatation. Results : 68 patients (40 men, 59%) were evaluated, 37 with manual anastomosis and 31 with mechanical anastomosis with similar demographic characteristics. Anastomotic leaks occurred in 13 patients (19.1%), with no difference found between manual and mechanical anastomosis (18.9 vs. 19.3%; p=0.93). Overall morbidity (61%), in-hospital mortality (3%) and length of hospital stay (median 12 days) were not affected by anastomotic technique. Follow-up endoscopic evaluation was available in all patients and anastomotic stricture associated or not with leak was detected in 18 patients (22%), in cases of stricture without leak is more frequent with manual than mechanical anastomosis technique (21.6 vs 6.4%; p=0.07) with longer duration of surgical procedure in case of manual anastomosis (p=0.05). Conclusions : Our non-randomized study suggests that the manual anastomosis technique results in a shorter surgical time and a lower stricture rate than mechanical anastomosis in cervical esophagogastric reconstruction after transhiatal esophagectomy, with a similar rate of leakage, hospital stay and morbidity and mortality.

Hipertensão renovascular / Renovascular hypertension

Estenoses da artéria renal (EAS) é um estreitamento ou bloqueio de uma artéria para os rins. Pode causar insuficiência renal e pressão alta. Fumantes e ex-fumantes têm maior risco de contrair RAS. Os homens são afetados com essa condição duas vezes mais que as mulheres. É mais comum nas idades de 50 e 70. Colesterol alto, diabetes, excesso de peso e histórico familiar de doenças cardíacas também são fatores de risco para RAS. A pressão alta é uma causa e resultado do RAS. A causa mais comum de bloqueio da artéria renal é a arteriosclerose (espessamento e endurecimento das paredes da artéria) com acúmulo de colesterol e placa. Isso é semelhante ao que é visto nas artérias coronárias do coração, nas artérias carótidas, no cérebro e nos vasos das pernas. Apresentamos um caso de doença vascular renal em um homem diabético e ex-fumante e é apresentada uma atualização sobre a doença.

Renal artery stenoses (RAS) is a narrowing or blockage of an artery to the kidneys. It may cause kidney failure and high blood pressure. Smokers and ex-smokers have a greater risk of getting RAS. Men are affected with this condition twice as often as women. It>s most common in the ages of 50 and 70. High cholesterol, diabetes, being overweight, and having a family history of heart disease are also risk factors for RAS. High blood pressure is both a cause and a result of RAS. The most common cause of renal artery blockages is arteriosclerosis (the thickening and hardening of artery walls) with cholesterol and plaque build-up. This is similar to what is seen in the coronary arteries of the heart, the carotid arteries to the brain and the leg vessels.We presente a case of renal vascular disease in a diabetic and ex-smoker man and an up to date about the disease is presented.

Efficacy of the clinical-instrumental algorithm in the treatment of spinal tandem stenosis / Eficácia do algoritmo clínico-instrumental no tratamento da estenose espinhal em tandem / Eficacia del algoritmo clínico-instrumental en el tratamiento de la estenosis espinal en tándem

ABSTRACT Objective: To conduct a multicenter analysis of the effectiveness of surgical tactics for treating patients with symptomatic tandem stenosis of the cervical and lumbar spine, based on a differentiated clinical-instrumental algorithm. Methods: The study included 97 patients with symptomatic tandem stenosis of the cervical and lumbar spine. The patients were allocated into 2 groups. The main prospective follow-up group (Group I) consisted of patients (n=46) who had undergone staged decompression/stabilization surgery according to the surgical tactics developed based on the differential clinical-instrumental algorithm. The clinical comparison group (Group II) (n=51) consisted of retrospectively recruited patients who, depending on the prevailing clinical condition, underwent primary surgery at the cervical level (29 cases) or at the lumbar level (22 cases). Results: The comparative analysis in Group I revealed significantly better parameters in the clinical and instrumental data. The total rates of postoperative surgical complications in the cervical and lumbar spine were 15% in Group I and 68% in Group II (p=0.0014). Conclusion: The multicenter analysis of the clinical-instrumental algorithm based on differential application of decompression/stabilization techniques enabled more rational and radical surgery, with less adverse outcomes, leading to earlier start of rehabilitation in the prospective group of patients (Group I), and an objective improvement in long-term clinical and functional outcomes. Level of Evidence II; Prognostic Studies - Investigating the Effect of a Patient Characteristic on Disease Outcome.

RESUMO Objetivo: Realizar uma análise multicêntrica da eficácia das táticas cirúrgicas no tratamento de pacientes com estenose sintomática em tandem da coluna cervical e lombar com base em um algoritmo clínico-instrumental diferenciado. Métodos: O estudo incluiu 97 pacientes com estenose sintomática em tandem da coluna cervical e lombar. Os pacientes foram divididos em 2 grupos. O grupo de acompanhamento prospectivo principal (Grupo 1) incluiu pacientes (n = 46) submetidos à cirurgia de descompressão/estabilização estagiada de acordo com as táticas cirúrgicas desenvolvidas com base no algoritmo clínico-instrumental diferencial. O grupo de comparação clínica (Grupo II) (n = 51) incluiu pacientes recrutados retrospectivamente que, dependendo do quadro clínico vigente, foram submetidos à cirurgia primária em nível cervical (29 casos) ou em nível lombar (22 casos). Resultados: A análise comparativa no Grupo I revelou parâmetros significativamente melhores nos dados clínicos e instrumentais. As taxas totais de complicações cirúrgicas pós-operatórias na coluna cervical e lombar foram de 15% no Grupo I e 68% no Grupo II (p = 0,0014). Conclusão: A análise multicêntrica do algoritmo clínico-instrumental baseada na aplicação diferencial das técnicas de descompressão/estabilização permitiu uma cirurgia mais racional e radical com menos desfechos adversos, levando a um início mais precoce de reabilitação no grupo prospectivo de pacientes (Grupo I) e uma melhora concreta nos desfechos clínicos e funcionais a longo prazo. Nível de Evidência II; Estudos prognósticos - Investigação do efeito de característica de um paciente sobre o desfecho da doença.

RESUMEN Objetivo: Realizar un análisis multicéntrico de la eficacia de las tácticas quirúrgicas en el tratamiento de pacientes con estenosis sintomática en tándem de la columna cervical y lumbar con base en un algoritmo clínico-instrumental diferenciado. Métodos: El estudio incluyó a 97 pacientes con estenosis sintomática en tándem de la columna cervical y lumbar. Los pacientes fueron divididos en 2 grupos. El grupo de acompañamiento prospectivo principal (Grupo I) incluyó a pacientes (n = 46) sometidos a cirugía de descompresión/estabilización por etapas de acuerdo con las tácticas quirúrgicas desarrolladas basadas en el algoritmo clínico-instrumental diferencial. El grupo de comparación clínica (Grupo II) (n = 51) incluyó a pacientes reclutados retrospectivamente que, dependiendo del cuadro clínico vigente, fueron sometidos a cirugía primaria en nivel cervical (29 casos) o en nivel lumbar (22 casos). Resultados: El análisis comparativo en el Grupo I reveló parámetros significativamente mejores en los datos clínicos e instrumentales. Las tasas totales de complicaciones quirúrgicas postoperatorias en la columna cervical y lumbar fueron de 15% en el Grupo I y 68% en el Grupo II (p = 0,0014). Conclusión: El análisis multicéntrico del algoritmo clínico-instrumental basado en la aplicación diferencial de las técnicas de descompresión/estabilización permitió una cirugía más racional y radical con menos resultados adversos, llevando a un inicio más precoz de rehabilitación en el grupo prospectivo de pacientes (Grupo I), y una mejora concreta en los resultados clínicos y funcionales a largo plazo. Nivel de Evidencia II; Estudios pronósticos - Investigación del efecto de característica de un paciente sobre el desenlace de la enfermedad.

Research Progress of Percutaneous Coronary Intervention of Left Main Coronary Artery Stenoses with Intravascular Ultrasound / 沈阳医学院学报

Intravascular ultrasound (IVUS) is an invasively tomograhpic techology. As a adjunct to angiography, IVUS has important application value for percutaneous coronary intervention (PCI) . IVUS allows to assess the degree of area stenosis, optimize PCI strategy and improve clinical outcomes. Although lacking randomized trials, the currently nonrandomized studies support that IVUS-guided PCI of the left main coronary artery stenoses reduce the rate of the major adverse cardiac events (MACE, including cardiac death,myocardial infarction,and target vessel revacularization) and improve long-term outcomes compared with angiography-guided PCI.

Stents autoexpandibles biodegradables en endoscopia intervencionista gastrointestinal y pancreatobiliar: Estado actual / The Current State of Biodegradable Self-expanding Stents in Interventional Gastrointestinal and Pancreatobiliary Endoscopy

Los stents biodegradables son una opción muy atractiva para utilizar en pacientes con estenosis benignas recurrentes/recalcitrantes del tracto digestivo y biliar. En teoría, utilizando estos stents biodegradables, se pueden evitar dilataciones repetitivas de estenosis digestivas o biliares refractarias al manejo convencional, como también se podrían evitar resecciones quirúrgicas, principalmente en pacientes de alto riesgo quirúrgico, y se minimiza el número de procedimientos endoscópicos intervencionistas.

Biodegradable stents are a very attractive option for use in patients with benign but recurrent and recalcitrant digestive tract and biliary strictures. In theory, use of these biodegradable stents mitigates the need for repetitive expansion of digestive or biliary strictures which are refractory to conventional management and avoids the need of surgical resection. This is especially true for patients at high surgical risk. Stents can also minimize the number of interventional endoscopic procedures performed on a patient.

Vía aérea en pediatría: cirugía de laringe y tráquea / Pediatric airway: larynx and tracheal surgery

Major congenital malformations affecting the larynx and trachea are laryngomalacia, vocal cord paralysis, subglottic hemangioma, congenital laryngeal web, laryngotracheal cleft, congenital tracheal stenoses, tracheal and bronchomalacia. The most frequent acquired diseases are stenotic lesions, mainly subglottic stenosis. In this chapter the main anomalies affecting the airway of children and adolescents are described, emphasizing the importance of early and accurate diagnosis as well as defining the modern treatment options.

Las principales malformaciones congénitas que afectan la laringe y tráquea son la laringomalacia, parálisis de cuerdas vocales, hemangioma subglótico, web laríngeo, hendidura laringotraqueal, estenosis traqueal congénita, traqueo y broncomalacia. Las lesiones adquiridas que con mayor frecuencia debemos diagnosticar y tratar son las lesiones post intubación, principalmente la estenosis subglótica. En este capítulo se describen estas afecciones de la vía aérea del niño, haciendo énfasis en la importancia de un diagnóstico precoz y preciso además de definir las alternativas modernas de tratamiento.

Implante de conducto apicoaórtico en paciente con estenosis aórtica severa post reemplazo valvular protésico / Apicoaortic valved conduit implanted in a patient with severe aortic stenosis due to mismatched aortic valve prosthesis

Introducción: La estenosis aórtica fibrocálcica es el tipo de valvulopatía más frecuente, especialmente en los adultos mayores, siendo el reemplazo valvular aórtico el tratamiento definitivo. Un mal resultado post operatorio puede deberse a un mal funcionamiento de la válvula protésica. Caso clínico: Paciente de 42 años de edad sometido a reemplazo valvular aórtico por presentar estenosis aórtica severa fibrocálcica en una válvula bicúspide y aorta de pared muy fina. Evoluciona asintomático durante 4 años, al cabo de los cuales y luego de abandonar su tratamiento anticoagulante consulta por disnea y dolor anginoso. Un ecocardiograma muestra estenosis severa de la válvula protésica. Dado los antecedentes de su cirugía previa se decide implantar un conducto de dacrón valvulado ápico-aórtico a través de toracotomía posterolateral izquierda. Evolución post operatoria muy satisfactoria permaneciendo asintomático, con un seguimiento de 15 meses. La recidiva de la estenosis aórtica severa post reemplazo valvular protésico tiene en el bypass ápico-aórtico una excelente alternativa de tratamiento efectivo, especialmente cuando el recambio valvular tradicional implica un alto riesgo quirúrgico.

Introduction: The most frequent surgical procedure of severe left ventricular outflow tract obstruction due to severe aortic stenosis is aortic valve replacement, but there is an alternative and less conventional method described by Cooley used in patients with previous aortic valve replacement and severe aortic wall calcification that bypasses the left ventricular outflow tract through the implant of an apicoaortic valved conduit. Clinical case: We describe the case of 42 years old patient with severe aortic stenosis due to mismatched valve prosthesis previously installed treated by of apicoaortic conduit implanted through left posterolateral thoracotomy.

Relationship between different types of internal watershed infarction and tandem stenoses of the internal carotid artery / 中国脑血管病杂志

Objective Toinvestigatetherelationshipbetweendifferenttypesofinternalwatershed infarctionandtandemstenosesofinternalcarotidartery(ICA).Methods Atotalof55patientswith internal watershed infarction confirmed by head MRI and diffusion-weighted imaging (DWI )examination were enrolled. They all underwent the extracranial internal carotid artery (ICA ) ultrasonography and intracranial cerebral artery MR angiography (MRA)examinations. According to the findings of imaging,the 55 patients with internal watershed infarction were divided into a simple internal watershed infarction (IWSI)group and an internal watershed infarction accompanied with ipsilateral cortical watershed infarction (C-IWSI)group. The relationship between the two types of internal watershed infarction and tandem stenoses of ICA was analyzed. Results (1 ) Of the 55 patients with internal watershed infarction,24 cases (43. 6%)were in the internal watershed infarction group and 31 cases (56. 4%)were in the C-IWSI group. The ipsilateral vascular stenosis were ICA 20 cases (36. 4%,including extracranial segment 11 cases and intracranial segment 17 cases),middle cerebral artery (MCA)44 cases (80. 0%), and tandem stenoses of ICA 15 cases (27. 3%). (2)Ipsilateral tandem stenoses of ICA:2 cases were in the IWSI group (intracranial ICA+MCA 2 cases);13 cases were in the C-IWSI group (extracranial ICA+intracranial ICA +MCA 4 cases,extracranial ICA + intracranial ICA 1 case,extracranial ICA + MCA 2 cases,and intracranial ICA+MCA 6 cases). (3)Compared with the IWSI group,the incidences of ipsilateral ICA stenosis and tandem stenoses of ICA in patients of the C-IWSI group were higher (54. 8%[n=17]vs. 12. 5%[n=3],41. 9%[n=13]vs. 8. 3%[n =2]),and there were significant differences(P =0. 001, 0.006]). The incidences of extracranial and intercranial ICA stenosis were higher than those of the IWSI group (35. 5%[n=11]vs. 0,45. 2%[n=14]vs. 12. 5%[n=3]),and there were significant differences (P=0.003,0.009).Conclusion Inthedifferenttypesofinternalwatershedinfarction,theincidenceof tandem stenoses of ICA is different. The IWSI patients with ipsilateral cortical watershed infarction often accompany by tandem stenoses of ICA.

Multiple Cerebral Arterial Stenosis Associated with Hepatitis B Virus Infection

BACKGROUND: There are conflicting findings regarding the association between hepatitis B (HB) virus (HBV) infection and atherosclerosis. CASE REPORT: A 34-year-old man was admitted for transient dysarthria and facial palsy. Ten years previously he had been diagnosed with HBV infection and treated with lamivudine (100 mg/day). Reactivation of HBV was detected 6 months before this recent admission. Serologic tests revealed that he was positive for HB early antigen, HB surface antigen, and anti-HB core. Brain magnetic resonance images were normal, but magnetic resonance angiograms revealed severe stenosis of the right middle cerebral artery, both external carotid arteries, and the basilar artery. CONCLUSIONS: This case report reveals that a young patient with reactivated HBV developed multiple arterial stenoses even though he had no risk factors for this disease.

Interventional treatment of cervical artery stenosis in the elderly patients aged 75 years and over / 中华老年医学杂志

Objective To investigate the clinical effect and feasibility of interventional treatment of cervical artery stenosis in the elderly patients aged 75 years and over. Methods The data of 60cases aged 75 years or over who underwent interventional treatment of the cervical arteriostenosis involving carotid artery (CA), vertebral artery (VA) or proximal segment of the subclavian artery (SCA) were analyzed retrospectively. The clinical manifestations, imaging characteristics,interventional managements and follow-up results were recorded. Results In this cohort, the mean age was (78. 9±3.7) years (range from 75 to 89). The 50 patients (93.3%) complained of cerebral ischemic symptoms, and all the patients had concurrent diseases or risk factors, including hypertension, diabetes mellitus, coronary heart disease (CHD), stroke history, and so on. Digital subtraction angiography (DSA) data showed 55 cases (91.7%) had 2 or more cerebral arteries with a stenosis exceeding 30%. Among all cases, 84 lesions were treated with 84 stents, with a technical success rate of 98.8%. After stenting, the percent diameter stenosis of lesions decreased from a mean of (80.8 ± 12.9) % to (7.1 ± 9.5 ) %. The periprocedural and 30-day postoperative neurological complication rate was 8. 3 %, resulting in a permanent complication rate of 5 %. Clinical improvement rate was 87.5%. During a follow-up period of (36.7±26. 3) months (range from 5 to 99), there were 4 deaths: 2 died from myocardial infarction, 1 died from brain metastases of lung cancer and 1 died from cerebral hemorrhage. Cerebral infarction recurred in 3 cases. Imaging follow-up in 78. 3% of patients for 66 stents, including ultrasound, CTA, MRA or DSA, showed that the general in-stent restenosis rate was 9. 1%, and the restenosis rate of VA, CA and SCA was 21.7% (5/23), 2.6%and 0, respectively. Conclusions The results of this series suggest that interventional treatment ofcervical artery stenosis in the elderly patients aged 75 years and over is effective and feasible. In our experience, clinical comprehensive management and skillful technique of the operator are equally important for the elderly patients aged 75 years and over with high incidence of concurrent diseases or risk factors.

A Case of Intracranial Hypertension with Hypoglycorrhachia Caused by Bilateral Transverse Sinus Stenoses

Intracranial hypertension is a clinical syndrome of raised intracranial pressure with various etiologies. The possible pathogenic mechanisms of intracranial hypertension are excess CSF production, reduced CSF absorption and increased cerebral venous pressure. CSF glucose in intracranial hypertension is at usually normal levels and hypoglycorrhachia in intracranial hypertension has yet to be reported. We report a 23-year-old woman, who had intracranial hypertension with hypoglycorrhachia caused by a bilateral transverse sinus stenoses.

The Utility of Multi-detector Row Spiral CT for Detection of Coronary Artery Stenoses

Contrast-enhanced multi-detector row spiral computed tomography (MDCT) was introduced as a promising noninvasive method for vascular imaging. This study examined the accuracy of this technique for detecting significant coronary artery stenoses. Both MDCT (Sensation 16, Siemens, Germany, 12 x 0.75 mm collimation and 0.42 sec rotation speed, 120 kV, 500 effective mA, and 2.7 mm/rotation table-feed) and invasive coronary angiography (CAG) were performed on 61 patients (mean age 59.2 +/- 10, 44 men) who were suspected of having coronary artery disease. All patients were treated with atenolol (25 - 50 mg) prior to imaging and the heart rate was maintained below 65 beats per minutes during image acquisition. The images were reconstructed in the diastole around TI - 400 ms with a 0.5 mm increment and a 1.0 mm thickness. All coronary arteries with a diameter of 2.0 mm or more were assessed for the presence of a stenosis (> 50% luminal narrowing). Two independent radiologists who were unaware of the results of the invasive CAG evaluated the MDCT data, and the results were compared with those from the invasive CAG (interval 1- 27, mean 11 days). An evaluation of the CT coronary angiogram (CTCA) was possible in 58 of the 61 patients (95%). Image acquisition of the major coronary arteries including the left main trunk was available in 229 out of 244 arteries. Invasive CAG showed that 35 out of 58 patients had significant coronary artery stenoses by. patient analysis of those who could be evaluated showed that CT coronary angiography correctly classified 30 out of 35 patients as having at least 1 coronary stenosis (sensitivity 85.7%, specificity 91.3%, positive predictive value 93.8%, negative predictive value 80.8%). By analyzing each coronary artery, CAG found 62 stenotic coronary arteries in the 229 coronary arteries that could be evaluated. MDCT correctly detected 50 out of 62 stenotic coronary arteries and an absence of stenosis was correctly identified in 156 out of 167 normal coronary arteries (sensitivity 80.6%, specificity 93.4%, positive predictive value 81.9%, negative predictive value 92.8%). The non-invasive technique of MDCT for examining the coronary artery appears to be a useful method for detecting coronary artery stenoses with a high accuracy particularly with the proximal portion and large arteries.

CT Coronary Angiography Using Multidetector Computed Tomography in Coronary Artery Disease : A Comparative Study to Quantitative Coronary Angiography

BACKGROUND AND OBJECTIVES: The purpose of the present study was to investigate the diagnostic accuracy of coronary stenoses in patients with ischemic heart disease using multidetector CT coronary angiography (MDCT) in the assessment of coronary artery disease. SUBJECTS AND METHODS: Forty-three patients (49-72yrs) undergoing conventional coronary angiography (CCA) were included in this study. All patients were premedicated with oral propranolol, 40-80 mg, to achieve an acceptable heart rate of less than 65 bpm, 1hr before the MDCT. All coronary arteries, including the distal segments and side branches, were assessed with respect to assessability and the presence of significant stenosis (>50%) and the results compared with those of CCA. RESULTS: Of the 645 coronary artery segments scanned, 540 were assessable (84%). A total 44 significant stenoses were detected by CCA and 49 lesions by MDCT. The overall sensitivity and specificity were 77 and 97%, respectively. The overall accuracy for the LAD, RCA and LCX was 94, 98 and 95%, respectively, and there were no differences in the accuracies in each vessel. The sensitivity in the proximal segments was much higher than in the distal segments. A total 15 segments were overestimated by the MDCT due to calcification and the small vessel size. CONCLUSION: MDCT, with improved spatial and temporal resolutions, and pre-treated with oral beta-blocker, permits the detection of coronary artery stenoses with a high degree of accuracy.

Comparison of Silent Patients with Painful Patients in Patients with Coronary Artery Stenoses during Exercise Myocardial Perfusion Scintigraphy

BACKGROUND AND OBJECTIVES: The angiographic profiles and myocardial ischemic variables were compared between patients with and without chest pain during exercise myocardial perfusion scintigraphy in patients with coronary artery stenoses. MATERIALS AND METHODS: Study population were 102 consecutive patients who have significant luminal stenoses (> 50%) on coronary angiography. They underwent symptom-limited treadmill exercise test and myocardial perfusion single photon emission computed tomography (SPECT). Tc-99m methoxylisobutyl isonitrile (MIBI) was injected intravenously at rest and one minute before the termination of exercise. Tomographic images were acquired within 1 hour of tracer injection. Electrocardiographic variables, scintigraphic summed reversibility scores and angiographic profiles were compared between patients with and without chest pain during exercise. RESULTS: Silent ischemia was noted in 52/102 (51%) of the subjects. The summed reversibility score of myocardial SPECT was not significanlty different between patients with (6.0+/-4.2) and without (5.1+/-5.0) chest pain. The extent, vessel distribution and stenosis severity of coronary artery disease were not significantly different between two groups. ST segment depression was more prominent in patients with chest pain (1.51+/-1.49 mm) than without chest pain (0.5+/-1.1 mm) during exercise stress testing. CONCLUSION: The degree of coronary stenoses and scintigraphic myocardial ischemia was not different between patients with and without chest pain during exercise stress testing.

Clinical observation of intraluminal stent angioplasty in the treatment of renal arterial stenoses / 介入放射学杂志

Objective To evaluate the clinical application of intraluminal stent angioplasty(PTRAS) in the treatment of renal arterial stenoses. Methods A retrospective study was done in 28 patients with renal arterial stenoses. Primary renal artery stenting was performed in 28 consecutive patients (36 renal arteries). Blood pressure, serum creatine, the number of anti hypertensive medications were recorded at 1,6,12 month post stent angioplasty respectively. Arterial angiography was also taken 1 year later to evaluate the incidence of restenosis. Results Technical success rate was 100% achiving in all patients without serious complications. Primary successful patenty rate reached 82% (renal artery 86%), secondary successful rate was 89% (renal artery 90%). Systolic and diastolic blood pressure were reduced significantly ( P