J Onrot — Page 2 | PubMed Health

PubMed1984

Hypertension in the elderly. The benefits of therapy.

Because of the growing number of elderly in the population, hypertension in this age-group is becoming an increasingly important issue. Hypertension carries greater risk in the elderly, and the benefits of treatment of diastolic hypertension appear to be at least as great in this age-group as in younger populations. The benefits of treating systolic hypertension remain to be determined. On the basis of available information, hypertension in the elderly should be treated in a fashion similar in general to that used in younger patients. However, great care must be taken to minimize side effects, postural hypotension in particular. Special consideration of the physiologic, pharmacologic, behavioral, and socioeconomic factors in the elderly will help guide therapy design.

Adrenergic beta-Antagonists↗

PubMed1975

Carbon monoxide in the urban atmosphere: hazards to the pedestrian and the street-worker.

The carbon monoxide (CO) concentrations encountered by pedestrians and workers in the streets of a large metropolis were monitored by a reliable and sensitive portable detector (the Ecolyzer). Up to 1,000 observations per day were collected for several months during the summer and fall of 1973. The CO levels ranged from 10 to 50 ppm (varying with wind speed and direction, atmospheric stability, traffic density, and the height of nearby buildings). Much higher average concentrations were found in such adverse sites as poorly ventilated underpasses and underground garages. Street closures for a pedestrian mall reduced levels on the mall to around the general urban background withoug large increases in readings on adjoining streets. Many street-workers have little medical supervision, and for this reason the urban eight-hour CO ceilings may be a more appropriate air quality target than the usual industrial figure of 50 ppm. However, even the latter is sometimes exceeded on busy city streets.

Air Pollution↗