individuals. They also found that the increase in blood pressure,
which kept gradually rising up to a certain limit, was indicative
that the tuberculous patient was not much toxic; therefore the
increase in blood pressure was of good prognosis.


CONDITIONS CAUSING CHANGE IN BLOOD PRESSURE

Woolley [Footnote: Woolley, P. G.: Factors Governing Vascular
Dilatation and Slowing of the Blood Stream in Inflammation, THE
JOURNAL A. M. A., Dec. 26, 1914, p. 2279.] quotes Starling as
finding that the blood vessels dilate from physical and chemical
changes in the musculature, and that this dilatation is caused by
deficient oxidation and accumulation of the products of metabolism,
including carbon dioxid. This dilatation ordinarily is transient and
not associated with exudation, but in inflammation the dilatation is
persistent and there is exudation. The carbon dioxid increase during
exercise stimulates a greater circulation of oxygen in the tissues
which later counteracts the normal increase in acid products. In
inflammatory processes, however, the acid accumulates too rapidly to
allow of saturation. In this case the circulation becomes slowed and
the cells become affected.

Besides these charges in the blood vessels of the muscles, the
general blood pressure becomes raised on exercise, the heart more
rapid and the temperature somewhat elevated, and the breathing is
increased. This increased heart rate does not stop immediately on
cessation of the exercise, but persists for a longer or shorter
time. The better trained the individual, the sooner the speed of the
heart becomes normal.