Experimental study of cryofreezing energy applications on the ventricular myocardium using sheep hearts

Okishige, Kaoru

doi:10.1111/pace.13117

Cited by 4 publications

(2 citation statements)

References 25 publications

(24 reference statements)

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“…Cryomapping is very useful in terms of avoiding unwanted adverse events such as complete AV block. El‐Sherif et al and Okishige and Freidman experimentally demonstrated the reversible interruption of the activation of the ventricular myocardium. The cooling makes the resting potential decrease resulting in a diminished excitability .…”

Section: Discussionmentioning

confidence: 99%

Cryofreezing catheter ablation of adenosine triphosphate sensitive atrial tachycardia

Okishige

Shigeta

Nishimura

et al. 2019

Cardiovasc electrophysiol

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Introduction Adenosine triphosphate (ATP) sensitive atrial tachycardia (AT) has been treated by radiofrequency catheter ablation. Cryofreezing energy has emerged as a novel energy source for catheter ablation. The aim of this study was to investigate the efficacy and safety of cryofreezing ablation for ATP‐sensitive AT. Methods and Results A total of six patients with ATP‐sensitive ATs were included in this study. A single atrial extrastimulation was able to initiate and terminate these ATs in all six patients. The electrophysiological findings satisfied the diagnostic criteria of ATP‐sensitive AT. The ablation catheter was located at the earliest activation site of atrial excitation during the AT, and cryofreezing energy was delivered through a cryoablation catheter to perform cryomapping at temperature of −30 or −80°C. When cryomapping successfully terminated the ATs, cryoablation at a temperature of −80°C was subsequently performed. The earliest atrial activation during AT was recorded at the Koch's triangle area associated with a distinct intra‐atrial activation sequence from that recorded during ventricular pacing. Cryoablation was performed at successful cryomapping sites and resulted in the complete elimination of the AT in all six patients without affecting the bidirectional atrioventricular (AV) nodal conduction. Conclusion Cryofreezing energy was safe and effective in treating ATP‐sensitive ATs even in patients with its origins located in the vicinity of the AV node.

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Section: Discussionmentioning

confidence: 99%

Cryofreezing catheter ablation of adenosine triphosphate sensitive atrial tachycardia

Okishige

Shigeta

Nishimura

et al. 2019

Cardiovasc electrophysiol

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“…However, they did not locate the site of the lower common pathway except for in one experimental study . We considered that only cryomapping could make the localization of the lower common pathway possible, because cryofreezing energy can provoke transient effects on the cardiac conduction system . The location of the lower common pathway was detected in the anterosuperior portion of Kock's triangle where cryofreezing and RF energy were able to successfully eliminate the slow pathway.…”

Section: Discussionmentioning

confidence: 99%

Lower common pathway location detected by cryoablation of atrioventricular nodal reentrant tachycardia of the common variety

Okishige

Shigeta

Nakamura

et al. 2019

Clinical Case Reports

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Japan ablation registry: cryoablation in atrioventricular nodal reentrant tachycardia (“JARCANRET study”): results from large multicenter retrospective investigation

Okishige

Okumura

Tsurugi

et al. 2019

J Interv Card Electrophysiol

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Experimental study of cryofreezing energy applications on the ventricular myocardium using sheep hearts

Abstract: Endocardial cryofreezing could provoke significant electrophysiological and injurious effects on the ventricular myocardium in the goat heart. Transmural cryolesions could be created when cryoprobe was appropriately applied.

Cited by 4 publications

References 25 publications

Cryofreezing catheter ablation of adenosine triphosphate sensitive atrial tachycardia

Cryofreezing catheter ablation of adenosine triphosphate sensitive atrial tachycardia

Lower common pathway location detected by cryoablation of atrioventricular nodal reentrant tachycardia of the common variety

Japan ablation registry: cryoablation in atrioventricular nodal reentrant tachycardia (“JARCANRET study”): results from large multicenter retrospective investigation

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