Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Clifford V. Nelson"'
Publikováno v:
Journal of Electrocardiology. 23:137-145
Myocardial infarctions were produced in young domestic farm pigs by ligating coronary arteries. Arteries ligated in four groups were (A) left anterior descending, (B) branches of left anterior descending, (C) left circumflex, and (D) right coronary a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09facc1ee445e39a892ed6c003c57062
https://doi.org/10.1016/0022-0736(90)90134-n
https://doi.org/10.1016/0022-0736(90)90134-n
Publikováno v:
Annals of Biomedical Engineering. 3:308-314
Methods which have been used for finding the resultant dipole moment of the hearts of various species are described. These include both isolated perfused hearts and heartsin vivo. A table of numerical values is given together with equations relating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0f90cee55db161884a6aa2c30b69d7a
https://doi.org/10.1007/bf02390975
https://doi.org/10.1007/bf02390975
Autor:
Clifford V. Nelson
Publikováno v:
Journal of Electrocardiology. 13:387-391
Summary Theoretical and experimental model studies on the effects of intracardiac blood have indicated that voltages due to a radial dipole are smaller than have been found in in-vivo experiments. The possible reasons for these differences have been
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf1d4492fb9a134cb378f31e03037d86
https://doi.org/10.1016/s0022-0736(80)80092-6
https://doi.org/10.1016/s0022-0736(80)80092-6
Autor:
Clifford V. Nelson, Brian C. Hodgkin
Publikováno v:
Annals of Biomedical Engineering. 17:437-455
We have measured magnitude and location of heart dipole moment during QRS in 46 New Zealand white rabbits. The spatial magnitude curve had one to three peaks. Mean values were M1 = 80 +/- 10 microA-cm (N = 5) pointing to right anterior and caudal, M2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4f5fa221fe65b87da5554f7d51adc70
https://doi.org/10.1007/bf02368061
https://doi.org/10.1007/bf02368061
Publikováno v:
American Heart Journal. 91:766-782
Summary Spatial dipole moment of the heart (M) was measured in patients before and 1 to 2 weeks after repair of atrial septal defect. In normals three peaks of M were found, corresponding to excitation of the septum (M 1 ), ventricular walls (M 2 ),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bb448b9d9a4b84bca98359f73ae3f3a
https://doi.org/10.1016/s0002-8703(76)80543-1
https://doi.org/10.1016/s0002-8703(76)80543-1
Autor:
J. Troquet, Clifford V. Nelson
Publikováno v:
Journal of Electrocardiology. 19:347-353
Summary It was shown that the resultant dipole moment of a system of sources and sinks within a region can be found from integrations of potential and potential gradient or normal current over the surfaces bounding the region. The method was applied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d2a6220ed948a238609cb7e5a7a7b04
https://doi.org/10.1016/s0022-0736(86)81062-7
https://doi.org/10.1016/s0022-0736(86)81062-7
Autor:
Clifford V. Nelson, Brian C. Hodgkin
Publikováno v:
IEEE Transactions on Biomedical Engineering. :817-823
The Gabor-Nelson equations are derived for the determination of the magnitudes, directions, and locations of two independent dipoles in a two-dimensional conducting region from boundary potential measurements. Eight equations were derived for the eig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::392fc26b4317cd387ed23893bccc2f19
https://doi.org/10.1109/tbme.1981.324681
https://doi.org/10.1109/tbme.1981.324681
Publikováno v:
American Heart Journal. 95:220-227
Vector dipole moments were measured on young pigs before and one week after ligation of the left anterior descending coronary artery. Vectors were obtained for the three peaks of vector spatial magnitude, M. Preoperative, postoperative, and differenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cc3970338674db80b17467eae155329
https://doi.org/10.1016/0002-8703(78)90466-0
https://doi.org/10.1016/0002-8703(78)90466-0
Publikováno v:
Journal of Theoretical Biology. 114:399-411
In order to found the application of the Gabor-Nelson theory to non-insulating boundaries, we have used a network which we have divided into two parts: a core energized by a source sink pair and an appendage, the conductivity of which may or may not
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a95096d112276be973bda3528fa5ff0d
https://doi.org/10.1016/s0022-5193(85)80175-2
https://doi.org/10.1016/s0022-5193(85)80175-2
Publikováno v:
Journal of Electrocardiology. 9:123-128
Vectorcardiograms were obtained from 50 young domestic pigs using the Nelson lead system. Compensation for body size and shape is achieved and the resultant dipole moment magnitude reflects heart size. A strong relationship was found between heart si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::525d79a7e9713a17e18682d2f6df0cc2
https://doi.org/10.1016/s0022-0736(76)80064-7
https://doi.org/10.1016/s0022-0736(76)80064-7