Browsing by Author "MANDALAM, KR"

Now showing 1 - 15 of 15
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    AORTOARTERITIS OF ABDOMINAL-AORTA - AN ANGIOGRAPHIC PROFILE IN 110 PATIENTS
    (CLINICAL RADIOLOGY, 1993)
    The angiographic appearances in 110 patients (49 males, 61 females, age range 11-46 years, mean 27.8 years) with aortoarteritis involving the abdominal aorta and/or its branches were analysed. There were 41 aneurysms of the abdominal aorta in 37 patients and eight aneurysms of its branches in as many patients. ln 50 patients, 53 obstructive lesions involved the abdominal aorta and were classified as stenoses of focal, segmental and diffuse types and total occlusions. Branch obstructions (182 lesions in 85 patients) affected in order of frequency, the renal, superior mesenteric, coeliac, iliac and the inferior mesenteric arteries. Mesenteric arterial lesions were significantly more common in males (P = 0.01). Collateral circulation through a prominent mesenteric arcade was a distinctive angiographic feature in 28 patients. Computed tomography done in four patients showed peri-adventitial thickening and layered thrombus within aneurysms in three patients, and luminal occlusion of the upper abdominal aorta in one patient.Angiographic appearances in aortoarteritis of the abdominal aorta are characteristic and sufficiently distinctive for definitive diagnosis and appropriate management.
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    CORPUS-CALLOSUM LIPOMA WITH FRONTAL ENCEPHALOCELE
    (NEURORADIOLOGY, 1990)
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    DISAPPEARANCE OF A CEREBRAL ANEURYSM - AN UNUSUAL ANGIOGRAPHIC EVENT
    (CLINICAL NEUROLOGY AND NEUROSURGERY, 1991)
    Spontaneous thrombosis of cerebral aneurysms demonstrated by angiography is infrequent. This article describes angiographically documented spontaneous thrombosis of an intracranial aneurysm at the posterior cerebral-posterior communicating artery junction in a 40-year-old woman. The initial angiogram done on 16th day after an episode of subarachnoid haemorrhage showed a medium sized aneurysm. Subsequent angiograms done on 30th, 40th and 60th day failed to demonstrate the aneurysm. The factors leading to this rare event remain obscure.
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    DISSOLUTION OF ISOBUTYL 2-CYANOACRYLATE ON LONG-TERM FOLLOW-UP
    (AMERICAN JOURNAL OF NEURORADIOLOGY, 1989)
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    HYDROGEL MICROSPHERES FROM CROSSLINKED POLY(METHYL METHACRYLATE) - SYNTHESIS AND BIOCOMPATIBILITY STUDIES
    (BULLETIN OF MATERIALS SCIENCE, 1989) JAYAKRISHNAN, A; THANOO, BC; RATHINAM, K; MANDALAM, KR; RAO, VRK; LAL, AV; MOHANTY, M
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    HYPERPERFUSION SYNDROME FOLLOWING BALLOON ANGIOPLASTY AND BYPASS-SURGERY OF AORTIC-ARCH VESSELS - A REPORT OF 3 CASES
    (CARDIOVASCULAR AND INTERVENTIONAL RADIOLOGY, 1992)
    Hyperperfusion syndrome is a rare complication following revascularization for severe cerebrovascular occlusive disease. We report 2 cases with milder manifestations of this syndrome in the form of unilateral headache following balloon angioplasty of brachiocephalic arteries, and 1 case with massive cerebral hemorrhage after aorto-carotid bypass surgery. The mechanism of autoregulation of cerebral blood flow and the pathophysiology of cerebral hyperperfusion are discussed. The importance of recognizing this phenomenon and possible means of preventing its occurrence are emphasized.
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    LEFT CERVICAL ARCH AND ASSOCIATED ABNORMALITIES
    (CARDIOVASCULAR AND INTERVENTIONAL RADIOLOGY, 1989)
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    NATURAL-HISTORY OF AORTOARTERITIS - AN ANGIOGRAPHIC STUDY IN 26 SURVIVORS
    (CLINICAL RADIOLOGY, 1994)
    The natural history of aortoarteritis was angiographically studied in 26 surviving patients (19 female; 7 male). The interval between the initial and current angiographic study was 38-228 months (mean - 84.46 months). All patients underwent panaortography during both studies and one patient also underwent pulmonary angiography. The lesions were extensive involving the ascending, arch and the descending thoracic and/or the abdominal aorta (Type III) in 15 patients; localized to the arch alone (Type I) in five patients and to the descending thoracic and/or abdominal aorta in five patients (Type II). Pulmonary angiography in the solitary patient with clinical features of pulmonary hypertension showed occlusion of the lower lobe branch of the right pulmonary artery. The lesions were occlusive in 19 patients, aneurysmal in one patient and mixed in six patients. While four patients developed fresh lesions in the follow-up period, two showed progression of existing lesions and one revealed partial thrombosis of an aneurysm. Persistently elevated erythrocytic sedimentation rate (>40 mm) was identified as a reliable indicator for activity of inflammatory process and disease progression. The stable nature of the lesions in 20 out of 26 patients in this study indicates a non-progressive course in the healed stage of aortoarteritis and suggests a conservative approach to the management of this disease in all patients except those with severe, life-threatening manifestations.
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    PERCUTANEOUS TRANSLUMINAL ANGIOPLASTY OF THE SUBCLAVIAN ARTERY IN NONSPECIFIC AORTOARTERITIS - RESULTS OF LONG-TERM FOLLOW-UP
    (JOURNAL OF VASCULAR AND INTERVENTIONAL RADIOLOGY, 1994)
    PURPOSE: The results of percutaneous transluminal angioplasty (PTA) of the subclavian artery in nonspecific aortoarteritis (Takayasu disease) are analyzed.PATIENTS AND METHODS: Twenty-four patients (15 men, nine women; age range, 18-47 years; mean, 37.1 years) with occlusive disease in 26 subclavian arteries, had symptoms due to vertebrobasilar insufficiency, upper limb claudication, or both. Aortography revealed stenosis in 19 arteries and occlusion in seven. The lesions were focal in 14 arteries (< 3 cm) and extensive in 12. Associated lesions involved the brachiocephalic artery in three patients, carotid arteries in five patients, and renal arteries in five patients.RESULTS: Initial technical and clinical success was achieved in 21 of 26 arteries (81%, 17 of 19 stenoses and four of seven occlusions). The maximum follow-up was 82 months (mean, 26 months), during which time restenosis occurred in six arteries, all of which had extensive lesions. The cumulative primary, secondary, and overall patencies were 64%, 82%, and 65%, respectively, as analyzed by means of the life-table method. The cumulative patencies for short- and long-segment lesions were 100% and 50%, respectively (P = .0113). Minor complications were observed in four of 26 procedures (15%) and included vasospasm (three patients) and transient loss of consciousness (one patient). There were no major complications.CONCLUSIONS: PTA is useful for treatment of occlusive disease of the subclavian artery in nonspecific aortoarteritis. The procedure is simple and associated with minimal morbidity. Long-term results are excellent in focal lesions but are less durable in the presence of more extensive disease.
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    SYRINGOHYDROMYELIA - RADIOLOGICAL EVALUATION OF 82 PATIENTS IN A DEVELOPING-COUNTRY
    (CLINICAL RADIOLOGY, 1991)
    A series of 82 patients presenting with syringohydromyelia and confirmed at operation were studied by conventional radiological techniques and computed tomography (CT). Cord collapse was demonstrated in 71% of the patients with wide bony canals and only 11% of patients with normal bony canals. It was most reliably shown with high resolution CT. Intrathecal CT metrizamide myelography (CTMM) failed to demonstrated contrast percolation into many cavities shown in the plain scans. Obliteration of the subarachnoid space at C1-2 levels appreciated in the plain scans strongly indicated coexisting tonsillar herniation, making CTMM unnecessary. In almost all patients, CTMM was found to be non-contributory if the high resolution plain CT scan failed to reveal cord cavitation.
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    TAKAYASU ARTERITIS - INITIAL AND LONG-TERM FOLLOW-UP IN 16 PATIENTS AFTER PERCUTANEOUS TRANSLUMINAL ANGIOPLASTY OF THE DESCENDING THORACIC AND ABDOMINAL-AORTA
    (RADIOLOGY, 1993)
    PURPOSE: To analyze results of percutaneous transluminal angioplasty (PTA) for stenosis of the descending thoracic and/or abdominal aorta caused by Takayasu arteritis (TA).MATERIALS AND METHODS: Subjects were 16 patients (12 female and four male, aged 6-46 years) with symptoms of hypertension or severe bilateral lower limb claudication. Total aortography revealed stenotic lesions in the descending thoracic aorta in five, in the abdominal aorta in 10, and in both vessels in one patient. Involvement of arch vessels in four patients and of the renal artery in four patients was also noted. Double-balloon angioplasty was performed in eight patients.RESULTS: Initial technical and clinical success was 100%. The maximum follow-up period was 52 months (mean, 21 months 2 weeks). Ankle-brachial index as determined with Doppler ultrasound improved considerably in 10 patients. Three patients had symptoms of restenosis during follow-up. Cumulative patency rate by life-table analysis was 67%.CONCLUSION: PTA has a definite role in the management of TA in view of its procedural simplicity, cost-effectiveness, and results compared with surgical revascularization procedures.
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    ULTRASOUND IMAGES VESSEL WALL FROM WITHIN
    (CURRENT SCIENCE, 1991) MANDALAM, KR