LO85 
auricle for this purpose. [ could consequently make use of these 
curves for the measurements, and now I find the a-v-interval 
Fig. 8. 
increased for the extra-systoles, decreased for the postcompensatory 
systoles, in comparison with the undisturbed rhythm. The duration 
of the R-oscillation behaved in the same manner’). 
Herewith I suppose, that I have established a law of the conser- 
vation of the power of transmission, both for the connecting systems 
of the separate partitions of the heart and for the heart-muscle itself. 
In this way LANGENDORFF has established, that the extra-systole is 
smaller, the posteompensatory systole larger than the normal systoles, 
and saw in ita law for the conservation of energy for the heart-muscle. 
When now, 20 minutes after the reproduction of Fig. 7, I make 
another reproduction, the basispulsations have ceased and with this 
again halving of rhythm has taken place, but now with systoles of 
the point-type. Between every two point-systoles there is now one 
auricle-systole that is not answered by the ventricle. This second 
way of halving of rhythm I saw also often in my suspension-curves. 
As a transition-stage heartpoly-, tri- and bigeminy were formed then. 
The slackening of the transmission of stimulation by poisoning 
with veratrine caused the formation of a split R-top. As an 
example I give here Fig. 9. 
L shall shortly indicate in what mannet this electrogram was made. 
1) The height of the R-top during the extra-systole was enlarged, during the 
postcompensatory systole diminished. In this manner it was, if the circulation of 
the blood was undistyrbed. That was caused by the bloodfilling of the heart. This 
was small during the extra-systole, through which the potential differences are 
less exchanged and stronger during the postcompensatory systole, through which 
the potential differences are more exchanged. When the bloodcirculation was 
disturbed all the R-tops had the same height. 
