Using whole-cell patch-clamp technique,the effect of radiofrequency catheter ablation(RFCA)on calcium current(Ica)of guinea pig ventricular myocytes was examined.The radiofrequency energy delivered was 20W×10 s.R...Using whole-cell patch-clamp technique,the effect of radiofrequency catheter ablation(RFCA)on calcium current(Ica)of guinea pig ventricular myocytes was examined.The radiofrequency energy delivered was 20W×10 s.RFCA decreased Ica apparently with the affected area reaching up to 1.2 cm from the ablation focus.In the meanwhile,the pathological lesion size resulted from RFCA was merely 0.41±0.11 cm.These findings indicate that RFCA,apart from causing tissue necrosis by heat,can affect myocyte membrane currents in a large area.This may explain why RFCA has a very high success rate with a small pathological lesion.展开更多
文摘Using whole-cell patch-clamp technique,the effect of radiofrequency catheter ablation(RFCA)on calcium current(Ica)of guinea pig ventricular myocytes was examined.The radiofrequency energy delivered was 20W×10 s.RFCA decreased Ica apparently with the affected area reaching up to 1.2 cm from the ablation focus.In the meanwhile,the pathological lesion size resulted from RFCA was merely 0.41±0.11 cm.These findings indicate that RFCA,apart from causing tissue necrosis by heat,can affect myocyte membrane currents in a large area.This may explain why RFCA has a very high success rate with a small pathological lesion.