201
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Reddy K, Fewer HD, West M, Hill NC. Slit ventricle syndrome with aqueduct stenosis: third ventriculostomy as definitive treatment. Neurosurgery 1988; 23:756-9. [PMID: 3216975 DOI: 10.1227/00006123-198812000-00013] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Slit ventricle syndrome is a poorly understood entity characterized by features of raised intracranial pressure and small ventricles in shunt-dependent hydrocephalics. Five patients with this syndrome were treated with antisiphon devices, high pressure shunts, or subtemporal decompression, but continued to be symptomatic. Third ventriculostomy, performed as a last resort in these patients, gave encouraging results. The patient data, operative approach, and preliminary results are presented here.
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202
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Abstract
The influence of vasoconstrictors of intracranial arteries on the amplitude and configuration of the intracranial pulse wave (ICPW) was investigated. Continuous pressure recordings from the descending aorta (systemic arterial pressure) and the third cerebral ventricle (intracranial pressure) were obtained from anesthetized cats. Computerized analysis of the configuration, amplitude, and frequency spectrum of ventricular wave (ICPW) and aortic pulse wave (SAPW) was performed. Artificial cerebrospinal fluid (CSF), blood, or 5-hydroxytryptamine (5-HT) was injected intracisternally. In 24 control cats, 2 ml artificial CSF was injected into the cisterna magna. This produced a significant increase in amplitude of the ICPW but no change in the SAPW. Ten animals received 14 intracisternal injections of 2 ml autologous blood which caused narrowing of the amplitude of the ICPW as well as of all its components (P1, P2, and P3), with no significant change in the SAPW's. Eight animals were also subjected to cisternal injection of 2 ml of a 10(-4)-M solution of 5-HT, resulting in findings similar to those produced by autologous blood. Frequency spectrum of the intracranial and aortic pulse waves showed a high degree of correlation between wave amplitudes and height of the fundamental wave in the FFT record. These results suggest that the cerebral vasospasm that follows cisternal injections of blood and 5-HT in cats can be diagnosed by analysis of the ICPW. This method may allow early diagnosis and continuous monitoring of cerebral vasospasm in humans.
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203
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Reddy K, Hobson DE, Gomori A, Sutherland GR. Painless glossopharyngeal "neuralgia" with syncope: a case report and literature review. Neurosurgery 1987; 21:916-9. [PMID: 3437961 DOI: 10.1227/00006123-198712000-00023] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Glossopharyngeal neuralgia is an uncommon craniofacial pain syndrome. An association with syncope is even less common. We report a case illustrating that the glossopharyngeal neuralgia-syncope syndrome can occur without pain in the sensory distribution of the glossopharyngeal nerve and that it can have similar consequences. We suggest that permanent cardiac pacing alone may be a viable option in the initial management of such cases.
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204
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Bruni JE, Reddy K. Ependyma of the central canal of the rat spinal cord: a light and transmission electron microscopic study. J Anat 1987; 152:55-70. [PMID: 3654376 PMCID: PMC1261746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Ependymal cells of the rat central canal were examined with a view to identifying features that distinguish them regionally and from their counterparts elsewhere in the ventricular system. The results revealed that the lining consisted for the most part of a pseudostratified layer of uniformly organised cuboidal to columnar ependymal cells present in largest numbers in lumbar and sacral segments and in the conus. Two cell variants were identified on the basis of the presence or absence of a radially directed cytoplasmic process originating from the base of the cell. The tanycytic form of ependymal cell was encountered along the entire length of the central canal but with increased frequency in caudalmost segments. Ependymal cells were largely similar in ultrastructural appearance along the length of the cord. Although they were also similar in appearance and orientation to their counterparts in the ventricles they did exhibit some unique features. The most notable were the prominent junctional complexes and associated filaments present along the lateral border of the cells near their apex and the abundance of intermediate filaments in tanycytes. The central canal of the filum differed most markedly from other segments of the cord and resembled in structure the primitive ependymal tube of the caudal cord in lower vertebrates. Ependymal cells of the cord were not sufficiently dissimilar morphologically from their counterparts in the ventricles to account for differences in proliferative capacity in response to localised injury. A factor that merits further study is the difference in numbers of tanycyte ependymal cells in the two locations for they may be the reactive elements that proliferate in response to injury.
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205
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Reddy K, West M, McClarty B. Multiple intracerebral arteriovenous malformations. A case report and literature review. SURGICAL NEUROLOGY 1987; 27:495-9. [PMID: 3563865 DOI: 10.1016/0090-3019(87)90261-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The presence of multiple intracerebral arteriovenous malformations (AVMs) in a single patient has only been very rarely reported. We present a patient with three separate angiographically demonstrable intracerebral AVMs, all of which were radiologically demonstrated and surgically removed without residual neurological deficit. A literature survey was conducted and all the previously described cases of multiple intracerebral AVMs are discussed, along with the potential diagnostic and therapeutic implications.
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206
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Reddy K, West M, Anderson B. Carotid endarterectomy without indwelling shunts and intraoperative electrophysiologic monitoring. Can J Neurol Sci 1987; 14:131-5. [PMID: 3607614 DOI: 10.1017/s031716710002624x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Although carotid endarterectomy is a common surgical procedure in North America, controversies exist regarding the type of anesthesia, the use of indwelling shunts and the need for intraoperative cerebral monitoring. We present a prospective study of 100 carotid endarterectomies performed over a three year period by a single surgeon without the use of indwelling shunts, patch grafts, or EEG monitoring. The combined stroke and mortality rate was 1%. Our results confirm those of other authors; that indwelling shunts and EEG monitoring are not absolutely essential for a satisfactory outcome in carotid endarterectomies.
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207
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Dick R, Platts A, Gilford J, Reddy K, Irving JD. The Carey-Coons percutaneous biliary endoprosthesis: a three-centre experience in 87 patients. Clin Radiol 1987; 38:175-8. [PMID: 3032497 DOI: 10.1016/s0009-9260(87)80025-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Eighty-seven patients with malignant obstruction of the biliary tract from three centres and deemed unsuitable for surgery underwent insertion of the 'Carey-Coons' transhepatic endoprosthesis. It was successfully introduced in all, with early relief of cholestasis in 97%. The 30 day mortality rate was 11.5%, which is lower than reported in series using different endoprostheses. Two fifths of patients had complications, especially cholangitis. Despite its ease of insertion the design of the endoprosthesis may be related to the high incidence of cholangitis and to formation of biliary sludge and occlusion found in follow up. Although the anchoring threads prevented migration, they may have played a role in infection at the skin entry site in four patients and in tumour seeding to the skin in a further two. Still further improvements in endoprosthesis design are desirable.
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208
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Reddy K, Verghese A. The usefulness of rees-eysenck body index as a measure of body build. Indian J Psychiatry 1987; 29:89-90. [PMID: 21927216 PMCID: PMC3172435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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209
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O'Connor JV, Reddy K, Ergin MA, Griepp RB. Cricothyroidotomy for prolonged ventilatory support after cardiac operations. Ann Thorac Surg 1985; 39:353-4. [PMID: 3985709 DOI: 10.1016/s0003-4975(10)62630-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Forty-nine patients required prolonged ventilatory support after cardiac operations. Cricothyroidotomy was used routinely in these patients after approximately 7 days of endotracheal intubation. There were no infections of the median sternotomy wounds despite frequent colonization of the stoma. The only immediate complication was mild stomal bleeding in a patient taking anticoagulants. Nineteen patients (39%) died of underlying disease. The average duration of cricothyroidotomy was 59 days (range, 3 to 270 days). Cannulas were successfully removed in all survivors after an average of 38 days (range, 6 to 187 days). All of the patients were followed by personal interview, telephone contact, or contact with the referring physician. The average length of follow-up was 17 months (range, 2 to 50 months). All symptomatic patients were evaluated by laryngoscopy and bronchoscopy. One patient required endoscopic removal of granulation tissue from the stomal site; 2 others required tracheal resection for stenosis at the balloon site. There were no instances of subglottic stenosis. There were 4 late deaths, none of which was related to the cricothyroidotomy. Based on these findings, we suggest that cricothyroidotomy, with its low complication rate, is the procedure of choice for patients requiring prolonged mechanical ventilation after cardiac operations.
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210
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Abstract
A flavonoid, gossypin, was evaluated for its analgesic action by using acetic acid-induced writhing in mice and was compared with morphine. Gossypin inhibited writhing in a dose-dependent manner. This action was antagonised by naloxone. The pA2 values for morphine-naloxone and gossypin-naloxone were almost identical suggesting a definite involvement of opiate receptors in the analgesic action of gossypin.
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211
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Shindler DM, Reddy K, Shindler OI, Kostis JB. Failure of the aortic valve to open during inspiration in cardiac tamponade. Chest 1982; 82:797-9. [PMID: 7140413 DOI: 10.1378/chest.82.6.797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
A new echocardiographic sign, failure of the aortic valve to open during inspiration, is described in a 35-year-old man with cardiac tamponade. There was disappearance of the radial pulse and blood pressure during inspiration and the usual clinical and echocardiographic signs.
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212
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Kostis JB, Krieger S, Cosgrove N, Moreyra A, Burns J, Reddy K, Kuo P. The mechanism of placebo effect on exercise tolerance in angina pectoris. Am J Cardiol 1982. [DOI: 10.1016/0002-9149(82)92410-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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213
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Hariprasad MK, Reddy K, Paul PK, Eisinger RP, Raju GS. Ascitic ultrafiltration. Treatment for intractable congestive cardiomyopathy. NEW YORK STATE JOURNAL OF MEDICINE 1982; 82:28-9. [PMID: 6950246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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214
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Reddy K, Haque SN, Cohen L, Sophie Z, Feller J, Stillman RM, Fitzgerald J, Stanczewski B, Sawyer PN. A clinical experience with the NCGT graft. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1981; 15:335-41. [PMID: 6815197 DOI: 10.1002/jbm.820150305] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A comparison of 130 grafts done in 101 patients included 47 veins, 25 Johnson & Johnson dialdehyde-starch-tanned collagen prostheses, and 58 NCGT grafts that had been followed for a 40-month period. This study had documented the fact that in spite of frequent poor runoff, a useful result is provided by the NCGT graft apparently due in part to its built-in nonthrombogenic structure providing a cumulative patency of 73%. The patency rate was even superior with venous bypasses. Therefore, we still feel that the autogenous vein provides the most useful bypass conduit available in vascular reconstruction. In situations where a vein could not be used or was not available the NCGT graft offers an equally useful nonthrombogenic surface to maintain prolonged patency. Thus, collagen appropriately modified can provide a useful prosthesis in vascular reconstruction.
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215
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Sawyer PN, Adamson R, Butt K, Fitzgerald J, Haque S, Landi J, Malik L, Mistry F, Ramasamy N, Reddy K, Stanczewski B, Kirschenbaum D. Long-term function of NCGT vascular conduits in a multicenter trial: evaluation of physical chemical parameters. BIOMATERIALS, MEDICAL DEVICES, AND ARTIFICIAL ORGANS 1980; 8:345-67. [PMID: 7023557 DOI: 10.3109/10731198009118989] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Our experience with the NCGT graft has now encompassed 12 years in experimental animals and 4.5 years clinical experience with 134 grafts in man. It has previously been suggested that vessel wall structure, interface-charge, electric potential, and polarity of the blood intimal interface appear critical in the prevention of intravascular thrombosis in all vascular prosthetic bypass grafts. This concept has now been confirmed using ferritin, colloidal iron and fluorescamine intimal labelling. These provide a quantitative special characterization of the surface charges of several grafts, including the NCGT graft. Study indicates that each step in the production of the NCGT graft results in a cumulative increase in the structured negative charge of the vascular interface. The more dense the structured negative charge of the prosthesis, the more resistant is the graft to short and long-term thrombosis in experimental animals and man. The experience has been confirmed with a comparative analysis of implantation results in 105 patients up to 4.5 years with 65 to 70% patency rate over that time interval. Statistical analysis of parameters confirm again that the polarity and structure of the vascular interface is important in the effective function and patency rate of the grafts.
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216
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Seedat YK, Seedat MA, Reddy K. The prevalence of hypertension in the Indian population of Durban. S Afr Med J 1978; 54:10-5. [PMID: 694688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In a random house-to-house study of 1 000 Indians the prevalence of essential hypertension according to the World Health Organization (WHO) criteria was 19% (females 22%; males 15%). The study revealed that the prevalence of hypertension was higher than in published data from India. Ethnicity in our study caused a significant variation in prevalence. Prevalence was lower than in our urban Zulu study. Blood pressure rose with age, but there was a greater rise in systolic than in diastolic blood pressure. Prevalence in males and females under 40 years were equal. There was an association between hypertension and diabetes mellitus. More effective screening and therapeutic programmes should be initiated in the Indian population because of the high prevalence of hypertension which may lead to complications if untreated, and because 58% of the hypertensive subjects were untreated or had discontinued therapy.
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217
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Herschman A, Natarajan N, Reddy K. Multiple fistulas between the coronary arteries and the left ventricle. Radiology 1977; 122:302. [PMID: 834861 DOI: 10.1148/122.2.302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The authors report a case of fistulas connecting the anterior descending, circumflex, and dominant right coronary arteries with the left ventricle. Although fistulous connections between a coronary artery and a cardiac chamber have been described before, this is only the third known case in which all of the coronary arteries communicated with the left ventricle.
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218
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Hayt DB, Reddy K, Patel H, Freeman LM. Radionuclide venography of the lower extremities and inferior vena cava by continuous injection and moving bed gamma camera technique. Radiology 1976; 121:748-50. [PMID: 981682 DOI: 10.1148/121.3.748] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Radionuclide venography has proved to be a tedious procedure because of the need for multiple imaging set-ups with coordinated, repeated injections of radionuclide. The use of a moving bed gamma camera has shortened the procedure. This method enables the entire sapheno-femoral-iliac-caval system to be visualized in continuity on a single film. The moving table top system also adequately imaged the suspected areas of thrombi or endothelial damage on the post-exercise study on a single film.
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219
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Kimball RE, Reddy K, Peirce TH, Schwartz LW, Mustafa MG, Cross CE. Oxygen toxicity: augmentation of antioxidant defense mechanisms in rat lung. THE AMERICAN JOURNAL OF PHYSIOLOGY 1976; 230:1425-31. [PMID: 1275087 DOI: 10.1152/ajplegacy.1976.230.5.1425] [Citation(s) in RCA: 156] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In studies directed at determining the activities of selected enzymes in lung tissue after in vivo exposure to hyperoxia, 70-day-old rats were exposed to 85% or 90% O2 for 1-14 days. After 7 days of exposure to 90% O2 (1atm), superoxide dismutase activities in mitochondrial and cytosolic fractions increased, respectively, to 245 and 145% of control; glutathione peroxidase, glutathione reductase, and glucose-6-phosphate dehydrogenase activities increased, respectively, to 317, 175, and 413% of control. The levels of reduced glutathione and total nonprotein sulfhydryl compounds were elevated to 195% and 365% of control. Similar changes were observed in rats exposed to 85% O2 for up to 14 days, but to a lesser degree. The changes are interpreted as a reflection of the overall magnitude of oxidant-induced lung injury-reparative processes. The results suggest that hyperoxia induces an increase in lung "antioxidant" defense capabilities. This apparent adaptive response may be important in decreasing the susceptibility of lung tissue to continued O2 toxicity.
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220
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Reddy K, Tappel AL. Effect of dietary selenium and autoxidized lipids on the glutathione peroxidase system of gastrointestinal tract and other tissues in the rat. J Nutr 1974; 104:1069-78. [PMID: 4851627 DOI: 10.1093/jn/104.8.1069] [Citation(s) in RCA: 69] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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221
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222
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Hamby RI, Aintablian A, Tabrah F, Reddy K, Wisoff G. Late systolic bulging of left ventricle in patients with angina pectoris. A form of asynchronous contraction. Chest 1974; 65:169-75. [PMID: 4544002 DOI: 10.1378/chest.65.2.169] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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223
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Reddy K, Fletcher B, Tappel A, Tappel A. Measurement and spectral characteristics of fluorescent pigments in tissues of rats as a function of dietary polyunsaturated fats and vitamin E. J Nutr 1973; 103:908-15. [PMID: 4705277 DOI: 10.1093/jn/103.6.908] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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224
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Chow CK, Reddy K, Tappel AL. Effect of dietary vitamin E on the activities of the glutathione peroxidase system in rat tissues. J Nutr 1973; 103:618-24. [PMID: 4693673 DOI: 10.1093/jn/103.4.618] [Citation(s) in RCA: 75] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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225
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Dillard CJ, Reddy K, Fletcher B, de Lumen B, Langberg S, Tappel AL, Urribarri N. Increased lysosomal enzymes in lungs of ozone-exposed rats. ARCHIVES OF ENVIRONMENTAL HEALTH 1972; 25:426-31. [PMID: 5086912 DOI: 10.1080/00039896.1972.10666198] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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