Browsing by Author "VALIATHAN, MS"
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Item A HEART-VALVE SUBSTITUTE(CURRENT SCIENCE, 1991) VALIATHAN, MSItem APPROPRIATE DIAGNOSTIC TECHNOLOGY(CLINICAL PHYSICS AND PHYSIOLOGICAL MEASUREMENT, 1990) VALIATHAN, MSItem CARDIAC-SURGERY - AN OFFSPRING OF EXPERIMENT(CURRENT SCIENCE, 1992) VALIATHAN, MSItem CELL-ADHESION AND GROWTH ON SYNTHETIC HYDROGEL BEADS(BULLETIN OF MATERIALS SCIENCE, 1989) SHIVAKUMAR, K; NAIR, RR; JAYAKRISHNAN, A; KARTHA, CC; VALIATHAN, MSItem CHITRA HEART-VALVE PROSTHESIS(ARTIFICIAL ORGANS, 1987) BHUVANESHWAR, GS; VALIATHAN, MS; RAMANI, AV; LAL, GAV; KUMAR, RSItem CLINICAL COURSE OF ENDOMYOCARDIAL FIBROSIS(BRITISH HEART JOURNAL, 1989)Item CONVERGENCE OF MEDICAL SCIENCE AND TECHNOLOGY - THE SREE-CHITRA-TIRUNAL-INSTITUTE(CURRENT SCIENCE, 1990) VALIATHAN, MSItem DOCTORS-DILEMMA - A POSTSCRIPT(CURRENT SCIENCE, 1992) VALIATHAN, MSItem ENHANCED CERIUM CONCENTRATION IN MAGNESIUM-DEFICIENT PLANTS(CURRENT SCIENCE, 1989) NAIR, RR; GUPTA, PN; VALIATHAN, MS; KARTHA, CC; EAPEN, JT; NAIR, NGItem EVALUATION OF MATERIALS FOR ARTIFICIAL-HEART VALVES(BULLETIN OF MATERIALS SCIENCE, 1991) BHUVANESHWAR, GS; Muraleedharan, CV; RAMANI, AV; VALIATHAN, MSThe heart of a normal human being beats about 38 million cycles every year. An artificial heart valve, to perform at this rate in the adverse conditions inside the heart for 20 years or more, should be highly wear-resistant with excellent fatigue strength. Thus, the study of mechanical and physical properties of the materials intended for use in artificial valves becomes an inseparable part of the valve development process itself. The physical and mechanical requirements of the materials used in the Chitra heart valve have been evaluated by studying their water absorption, adhesive wear and abrasive properties. The mechanical durability of the device has been assessed by accelerated life cycle testing. The test systems developed for the above are described here. The results show UHMW-PE to be a highly wear-resistant material suitable for the occluder. The accelerated wear tests show that the valve with Haynes-25 alloy cage and UHMW-PE disc has durability in excess of 50 years.Item EXTRINSIC COMPRESSION OF PULMONARY-ARTERY IN FALLOTS TETRALOGY(JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY, 1990) CHISTI, M; VALIATHAN, MS; MANDALAM, R; BALAKRISHNAN, KGItem GEOCHEMICAL BASIS OF TROPICAL ENDOMYOCARDIAL FIBROSIS(CURRENT SCIENCE, 1995) EAPEN, JT; SHIVAKUMAR, K; NAIR, RR; KARTHA, CC; VALIATHAN, MSItem GEOCHEMICAL BASIS OF TROPICAL ENDOMYOCARDIAL FIBROSIS(CURRENT SCIENCE, 1994) VALIATHAN, MS; KARTHA, CC; NAIR, RR; SHIVAKUMAR, K; EAPEN, JTEndomyocardial fibrosis (EMF) has a marked preference for the tropics and the poor socio-economic class. Tropical soil is rich in minerals such as monazite and the endomyocardial samples of patients with EMF show higher levels of cerium - a major constituent of monazite - in combination with lower concentrations of magnesium. The geochemical hypothesis postulates that poor children are prose to develop magnesium deficiency because of insufficient intake and the higher growth needs for the element. The deficiency of magnesium promotes the absorption of cerium and enhances its toxicity which could form the basis for the initial injury in EMF.Item GEOGRAPHY AND THE HEART(CURRENT SCIENCE, 1990) VALIATHAN, MSGeography brings to mind the physical formations of the earth, mountains and rivers, plains and deserts, oceans and bays. Presently climate, winds and currents enter the mental picture. In contrast, the heart ticks on within the inner sanctum of the body, unseen and unheard. The connection between the world without and the heart within is scarcely apparent. Does the heart sense geographical events? Does it leap up before the rainbow in the sky?Item GLIMPSES OF ANCIENT INDIAN MEDICINE .1.(CURRENT SCIENCE, 1990) VALIATHAN, MSItem GLIMPSES OF ANCIENT INDIAN MEDICINE .2.(CURRENT SCIENCE, 1990) VALIATHAN, MSItem HIGHER-EDUCATION - OLD MALADIES AND A LINE OF TREATMENT(CURRENT SCIENCE, 1994) VALIATHAN, MSItem MAGNESIUM LEVEL - REPLY(CURRENT SCIENCE, 1993) VALIATHAN, MS; EAPEN, JTItem PALLIATIVE RECONSTRUCTION OF RIGHT VENTRICULAR OUTFLOW TRACT IN TETRALOGY(ANNALS OF THORACIC SURGERY, 1991) NAIR, SK; VENKITACHALAM, CG; VALIATHAN, MSItem PARADOXICAL EFFECT OF CERIUM ON COLLAGEN-SYNTHESIS IN CARDIAC FIBROBLASTS(JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY, 1992)