Author + information
- H. Tsuchiya,
- H. Kubota,
- H. Endo,
- H. Ishii and
- K. Terakawa
Various ablation devices have been developed for the treatment of arrhythmia at present. We developed a new ablation device using infrared radiation and electrophysiologically and histopathologically investigated its efficacy.
Coagulation method; Five courses (30 seconds), each consisting of infrared irradiation for 4 seconds and an interval for 2 seconds, were given to the right atrium on beating heart. Evaluation methods; 1. EPS; A-1; Measurement of delay in impulse conduction. A-2; The predicted rate of conduction delay after irradiation calculated from conduction distance was compared with the measured rate of conduction delay. B; The root of the right atrium was irradiated under overdrive pacing. 2. Pathological findings.
1. A; Impulse conduction time: Before: during: after irradiation=7.0: 11.0: 10.0 msec(Fig 1). The rate of conduction delay (predicted rate: measured rate during irradiation: measured rate after irradiation) = 1.55:1.57:1.43(Fig 2). B; Reversible block converted to irreversible block during irradiation. 2. Some regions showed transmural coagulation and some did not.
Creation of electrical block in the atrial free wall on beating heart by infrared irradiation was clinically confirmed.