2024-03-29T06:00:08Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00020820
2022-12-15T03:51:30Z
453:456
471:537:538:1171
持続型心室頻拍のリエントリー回路の伝導特性の検討
持続型心室頻拍のリエントリー回路の伝導特性の検討
Further Observations on the Conduction Property of Reentrant Circuit in Sustained Ventricular Tachycardia.
相沢, 雅美
Ventricular Tachycardia
reentrant circuit
Electrophysiologic studies
transient entrainment
心室頻拍
リエントリー回路
電気生理検査
エントレーメント現象
In sustained ventricular tachycardia(VT), the conductive property of the reentrant circuit was characterized by the use of transient entrainment and related to the ability to interrupt VT in 25 patients. At 1-10 paced cycle lengths, VT was entrained in all patients with rapid pacings but interrupted in 16 patients. As the paced cycle length decreased in 4 or more steps, the conduction time which was measured as the interval between the stimulus and the orthodromically captured electrogram was analyzed in 21 patients. Of these, 14 patients showed a rate depenent prolongation of the conduction time;a decremental conduction, and 7 showed a fixed value. VT with a decremental conduction was interrupted in 78.6% but VT without a decremental conduction was interrupted only in 28.6%. The study was repeated in 7 patients in which VT showed a decremental conduction. VT with same QRS morphology but with different cycle length was induced after procainamide;327±50 msec vs. 412±36 msec (p<0.01), and all of them were interrupted. The conduction time prolonged by 41±16 msec for the mean decrement of the paced cycle length by 50±22 msec before procainamide. After procainamide, a significantly smaller prolongation;17±18 msec was observed for the similar degree of the decrement of the paced cycle length;44±15 msec (p<0.01). The increment of conduction time for the decrement of the paced cycle length would be reflect the conductive property and would be related to the ability to interrupt tachycardia with rapid pacings. With antiarrhythmic drugs, the decrernental property might be attenuated from the slowing of tachycardia rate but the interruption seemed to be facilitated.
新潟医学会
1992-08
jpn
departmental bulletin paper
http://hdl.handle.net/10191/39904
https://niigata-u.repo.nii.ac.jp/records/20820
AN00182415
00290440
新潟医学会雑誌
新潟医学会雑誌
106
8
778
786
https://niigata-u.repo.nii.ac.jp/record/20820/files/106(08)_778-786.pdf
application/pdf
1.5 MB
2019-08-16