1139 
the a-v-interval of the last 6 systoles before the hiatus, and of 
8 after it. The numbers 
before the hiatus are: after the hiatus are: 
09 sec. 0,7 sec. 
dn OER =. 
| 0:95 
del 5, 095, 
ci Waa 0,95, 
© ees 
0,95 ,, 
0:95-,, 
Consequently we see that the «-v-interval increases in duration, 
whenever a ventricle- and an auricle-systole fall out. After the hiatus 
the a-v-interval is smaller, and afterwards increases again in 
duration. 
Further I fixed the duration of the beginning of each ventricle- 
systole to the beginning of the next following auricle-systole. As 
variable quantities in these measurements must be taken into con- 
sideration in the first place the retardation or anticipation (by 
increase or decrease of the intervals s/-a and a-v) of the ventricle 
systole with which I began the measurement, and then the retard- 
ation or anticipation of the beginning of the following auricle-systole 
(through modification caused in the velocity of conduct between s7 
and «)*). Beginning with the 6 systole before the first hiatus this 
duration for this systole and the following one amounted to: 
1,8 
1,8 
de, 
18 
1,8 
3,4 (at the first hiatus) 
2,1 
1,9 
1,8 
1,8 
1 
3,7 (at the second hiatus) 
2,1 
1) Where I speak of the time of conduction between si and @ and between a 
and v. I understand by it the time required for the stimulation to transmit itself 
along the systems of conduct + the lime, that the stimulation requires to influence 
the atrium resp. the ventricle. 
