. Diseases of the heart and thoracic aorta. n. B. Forward Ejfects.— Small and variable quantities ofblood are passed into the left ventricle through the stenosedorifice ; consequently small and variable quantities of bloodare pumped into the arterial system, the pulse being, there-fore, small, unequal in volume, and irregular in time. (Solong as the compensation is well maintained, the volumeand rhythm of the pulse may not be much altered.) Theoccurrence of a second and imperfect ventricular contraction For the reasons previously given, the accentuation of the puhiionarj secondsound may dimini
. Diseases of the heart and thoracic aorta. n. B. Forward Ejfects.— Small and variable quantities ofblood are passed into the left ventricle through the stenosedorifice ; consequently small and variable quantities of bloodare pumped into the arterial system, the pulse being, there-fore, small, unequal in volume, and irregular in time. (Solong as the compensation is well maintained, the volumeand rhythm of the pulse may not be much altered.) Theoccurrence of a second and imperfect ventricular contraction For the reasons previously given, the accentuation of the puhiionarj secondsound may diminish or disappear with the occurrence of tricuspid regurgitation. * In this description I have sketched the backward effects in their anatomical,rather than their chronological sequence, venous engorgement and its resultingsymptoms occurring long before many of the other conditions, such as tricuspidregurgitation. Differential diagnosis of Cardiac Murninrs. 2 i 7 in the sphygmographic tracing, such as is shown in fig. 56,is often Pressure 3| oz. Fig. ^b.^Trre^nlarity of the Pulse.—^. M., aet. 50, admitted to NewcastleInfirmarj- 30th November 1878, suffering from the usual symptoms ofmitral disease. The hearts action was extremely irregular The leftventricle much hypertrophied. There was no rheumatic history. Thesymptoms were of two months duration. I have attennpted in figs. 57, 58 to represent in a diagram-matic manner, the backward effects which mitral lesionsproduce on the heart and circulation.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectheart, bookyear1884
