Observations upon Some Aspects of A-V Conduction in Advanced A-V Block
1962 年 3 巻 1 号 p. 73-82
詳細
1962 年 3 巻 1 号 p. 73-82
(1) In 11 cases of advanced A-V block, irregularity of RR distance was studied, by analysis of QP-PQ curves.
(2) The generating mechanism of decreased A-V conductivity may chiefly be due to abnormal prolongation of the refractory period of the A-V junctional tissues.
(3) From the presence of constancy of A-V conduction time of ventricular captures, 2 types of the mode of A-V conduction delay were recognized;
a) the one suggesting abnormal prolongation of the absolute refractory period,
b) the one suggesting abnormal prolongation of both the absolute and relative refractory periods of the A-V junctional tissues.
(4) By displaying the incidence of A-V block, it was shown that advanced A-V block is not rare, as compared with other types of A-V block.
(5) Three complex cases in which other additional factors participate were presented.
