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Biomedical subjects

J Swarup

Publications and source records attributed to J Swarup.

3 recordsLinked to original sources

Cardiovascular surgery in blacks.

The available information concerning cardiovascular surgery in blacks is very limited and incomplete. Those few reports that do exist seem to show that the usual indications for surgery, preoperative findings, and final results can be expected. Acquired heart disease is as important a cause of mortality in African Americans as in others and is amenable to surgical intervention. Surgical mortality is easily attributable to the usual iatrogenic variables or comorbid disease. At present it is uncertain whether the incidence of inoperable disease or problems of access to health care are responsible for the low rate of utilization by blacks. A more accurate account will become available when large-volume programs begin to report their results.

Adult↗

Transmitted photon spectra of low-energy gamma rays through water.

From the transmitted spectra of point sources it is concluded that in a medium of low effective atomic number, a multiple-scatter peak is observed at an energy below 100 keV where Compton collisions are not very effective in energy-degradation and photoelectric cross-section is negligible. The energy of the peak does not depend on the thickness and physical state of the medium, or on the primary photon energy. The intensity of the peak decreases exponentially with the thickness of the medium. Measured build-up factors are compared with the calculated ones available in the literature.

Gamma Rays↗