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51.
Salutario Martinez M.D. Carlisle L. Morgan Ph.D. M.D. John A. Gehweiler Jr. MD. Barry Powers M.D. Michael D. Miller M.D. 《Skeletal radiology》1979,3(4):206-212
Seven percent of 400 patients with cervical spine fractures and/or dislocations had unusual lesions of the axis. The authors have analyzed axis injuries by review of radiographs and clinical data and have derived a classification of traumatic conditions. Uncommon traumatic axis abnormalities are discussed with reference to incidence, causes, clinical findings, mechanism of injury, and roentgen characteristics.Picker Scholar, James Picker Foundation 相似文献
52.
Murakami T Kikugawa D Endou K Fukuhiro Y Ishida A Morita I Masaki H Inada H Fujiwara T 《Artificial organs》2000,24(12):953-958
In this study, we analyzed the extent and pattern of regression of left ventricular (LV) hypertrophy after aortic valve replacement in patients with aortic stenosis (AS) and compared the results with those of another group of patients with aortic regurgitation (AR). Seventy patients who underwent isolated aortic valve replacement were divided into 2 groups. Group 1 was comprised of 29 patients who underwent aortic valve replacement for aortic stenosis, and Group 2 of 41 patients who underwent aortic valve replacement for aortic regurgitation. A third group of 10 healthy subjects served as a healthy control group. Echocardiographic studies were done before the operation and 5 years postoperatively. At follow-up, a significant reduction in the left ventricular mass was found in both groups, but it remained significantly greater than in the healthy control group. The ratio of LV wall thickness to radius (th/r) in Group 1 decreased significantly, and at follow-up it was within the normal value. In Group 2, the th/r ratio increased, and at follow-up it was within the normal value. After aortic valve replacement, the wall thickness remained significantly greater than normal for patients with AS, and the chamber radius remained significantly greater than normal for patients with AR. For these reasons, LV hypertrophy still existed in both groups at postoperative follow-up. The actuarial survival rate was 85.3% at 16 years for Group 1 and 83.4% at 18 years for Group 2. There was no significant difference in the long-term survival rates between the 2 groups. Actuarial freedom from valve-related events was 91.9% at 16 years for Group 1 and 82% at 18 years for Group 2. There was no significant difference in the valve-related event free curves between groups. After 5 years of follow-up, th/r reached normal for both groups, indicating remodeling of the LV geometry after aortic valve replacement. 相似文献
53.
目的 :比较不同类型错牙合畸形的牙弓形态。方法 :采用三维测量仪精密测量正常牙合及 4组不同类型错牙合(ClassⅠ双颌前突、ClassⅡ1、ClassⅡ2 、ClassⅢ )的原始模型 ,圆锥曲线模拟其牙弓形态。结果 :不同类型错牙合牙弓形态的差异有显著性 ,甚至某些分组的上下颌之间牙弓形态的差异也有显著性。结论 :临床上弯制弓丝时采用单一的标准牙弓形态是不完全科学的 ,应考虑错牙合的不同类型及其矫治前不同的牙弓形态以防止畸形复发。 相似文献
54.
E. Bruckheimer Z.R. Bulbul J.C. Love C.S. Kleinman W.E. Hellenbrand 《Pediatric cardiology》1998,19(5):428-430
Three patients with patent ductus arteriosus and moderate aortic stenosis had a marked reduction in aortic valve gradient
following transcatheter ductal occlusion. The hemodynamic effects of an aortopulmonary shunt on the severity of left ventricular
outflow obstruction and the implications on intervention are discussed. 相似文献
55.
P. Dervanian L. Macé T.A. Folliguet A. di Virgilio J.M. Grinda J.F. Fuzellier B. De Geeter P. Morville J.Y. Neveux 《Pediatric cardiology》1998,19(4):369-373
The prognosis of Marfan syndrome in both adult and pediatric patients is primarily related to the cardiovascular complications.
In infantile Marfan syndrome, although involvement of the mitral valve is the most frequently encountered cardiovascular lesion,
the aortic root can be more worrisome because of its excessive dilatation, leading to aortic insufficiency or dissection.
If the role of elective surgery is relatively well defined for adult patients, it is still debated during childhood. We report
two patients, aged 22 months and 5 years, each presenting an aortic root aneurysm related to Marfan syndrome, and each treated
with the Bentall procedure without specific age-related mortality or morbidity. These two patients experienced normal growth
and were free of any complication for a follow-up period of 8 and 2 years, respectively. More than an absolute value of the
aortic root dimension, it is the conjunction of the rate of progression of the aortic root dilatation, the degree and the
duration of the aortic valve regurgitation, and its resulting left ventricular dysfunction that must be taken into consideration
in choosing the surgical option. 相似文献
56.
目的总结我院1993年8月至2004年5月29例胸主动脉瘤手术体外循环(CPB)经验。方法29例胸主动脉瘤患者,实施Bentall’s手术、主动脉次全弓及全弓置换术及升或胸降主动脉人工血管置换术。根据术式分别采用常规中低温CPB,中、深低温停循环加选择性脑灌注,选择性脑灌注加下半身灌注、部分股股转流等灌注方法。结果平均CPB时间(179·8±78·1)min。并发症以出血和感染为主。早期死亡2例,晚期死亡4例。死亡率20·7%。结论正确选择CPB方法及良好的CPB管理是胸主动脉瘤手术成功的保障。 相似文献
57.
Bogaert J Kuzo R Dymarkowski S Janssen L Celis I Budts W Gewillig M 《European radiology》2000,10(12):1847-1854
Regular follow-up is required in patients with previous intervention for coarctation of the aorta to detect recoarctation
or aneurysm formation. In this study we describe the findings encountered on routine follow-up exams and we compare the use
of contrast-enhanced 3D MR angiography (CE MRA) with fast spin-echo MRI (FSE) to study the thoracic aorta after previous intervention.
In 51 consecutive patients previously treated for aortic coarctation, 74 MR studies of the thoracic aorta were performed during
a 2-year period using CE MRA and FSE MRI. The thoracic aorta was evaluated for abnormalities of course, caliber, shape, and
pathology of side branches. The CE MRA and FSE MRI studies were evaluated side by side by consensus of two reviewers evaluating
which MR technique depicted the abnormalities of the thoracic aorta the best. Of 74 exams, six clinically important abnormalities
were found: four aneurysms and two restenoses. Two small pseudoaneurysms were missed on the FSE studies. Contrast-enhanced
MRA was judged to visualize aortic abnormalities better than FSE (47 of 74 MR studies) especially for the transverse aortic
arch, coarctation site, left subclavian artery, and aortic arch configuration. For the ascending aorta and distal descending
aorta, CE MRA and FSE performed equally well. Aortic diameters measured at four levels in the first 18 MRI studies showed
no significant differences in diameter when measured by FSE or CE MRA (p = not significant). Clinically important abnormalities, such as aneurysm formation and restenosis, can be present years after
treatment for aortic coarctation. In the regular follow-up of these patients, CE MRA may provide additional diagnostic information
compared with FSE and should be included as part of the routine exam.
Received: 3 April 2000; Revised: 5 July 2000; Accepted: 7 July 2000 相似文献
58.
Congenital abnormality of the aortic arch is a diagnosis made most of the time incidentally in childhood, unless dysphagia
or respiratory disorders occur before. A case of a complex aortic arch anomaly with an aneurysm of the right subclavian artery
presenting as an isolated Horner's syndrome in an adult is reported herein. Magnetic resonance imaging led to this very unusual
diagnosis.
Received: 17 March 1999; Revised: 15 July 1999; Accepted: 13 August 1999 相似文献
59.
60.
目的探讨主动脉夹层患者的临床特征、诊断、治疗及预后。方法对56例主动脉夹层患者的病因、临床表现、影像学检查、分型、治疗和预后进行回顾性分析。结果主动脉夹层的常见原因为高血压;临床表现主要为胸、背部疼痛,CT和MRI检查确诊率高;A型患者的并发症发生率和死亡率显著高于B型患者;介入治疗临床效果较好。结论A型患者的预后较B型差,早期诊断、合理治疗可以改善患者的预后。 相似文献