Hyperthermia dependence of cardiac conduction velocity in rat myocardium: Optical mapping and cardiac near field measurements
Hyperthermia dependence of cardiac conduction velocity in rat myocardium: Optical mapping and cardiac near field measurements
复制标题
大鼠心肌传导速度的热依赖性:光学测绘和心脏近场测量
DOI:
10.1109/embc.2017.8037658
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
G. Seemann
中科院分区:
文献类型:
--
作者:
S. Pollnow;R. Arnold;M. Werber;O. Dössel;G. Seemann
Hyperthermia during radiofrequency ablation causes reversible and irreversible changes of the electrophysiological properties of cardiac tissue. However, the mechanisms are incompletely understood. We studied changes of conduction velocity (CV) in rat myocardium under hyperthermic conditions from macroscopic to microscopic scale by using simultaneous optical mapping and a miniaturized electrode array. Atrial preparations from five rats were superfused at tissue bath temperatures between 36.7°C and 43.8°C. Optical mapping data showed an elevated median CV by 21% when increasing the temperature from 36.7°C to 42.0°C. CV did not increase above 42.0°C. Electrical measurements revealed a similar temperature dependence of CV between 36.7°C and 42.0°C, i.e. an increase of median CV by 26%. The consolidation of optical and electrical data in this study allowed investigation of excitation during global hyperthermia. Macroscopic optical mapping and microscopic electrical measurements demonstrated that hyperthermia strongly influenced electrical propagation at a microscopic scale.
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DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
Shien‐Fong Lin;R. A. Abbas;J. Wikswo
通讯作者:
J. Wikswo
影响因子:
24
作者:
T. Simmers;Jacques M.T. de Bakker;F. Wittkampf;Richard N. W. Hauer
通讯作者:
Richard N. W. Hauer
影响因子:
2.7
作者:
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通讯作者:
D. Haines
DOI:
--
发表时间:
2001
期刊:
2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
影响因子:
--
作者:
G. Plank;E. Hofer
通讯作者:
E. Hofer
影响因子:
2.7
作者:
Kettlewell, S;Walker, NL;Smith, GL
通讯作者:
Smith, GL