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Map-guided surgery for atrial fibrillation.

Takashi Nitta¹, Hiroya Ohmori, Shun-ichiro Sakamoto

¹Department of Cardiothoracic Surgery, Nippon Medical School, Tokyo, Japan. nitta@nms.ac.jp <nitta@nms.ac.jp>

The Journal of Thoracic and Cardiovascular Surgery

|January 29, 2005

Summary

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Intraoperative mapping helps tailor atrial fibrillation surgery to individual patients. This approach optimizes procedures, leading to high success rates and reduced complications compared to standard methods.

Area of Science:

Cardiology
Cardiac Surgery
Electrophysiology

Background:

Current atrial fibrillation surgeries have high success rates but lack patient-specific electrophysiologic guidance.
This can lead to unnecessary procedures or suboptimal treatment for some patients.

Purpose of the Study:

To determine the benefit of intraoperative mapping in guiding surgical treatment for atrial fibrillation.

Main Methods:

A 256-channel 3D dynamic mapping system with epicardial electrodes was used.
Atrial activation was examined in 46 patients (37 continuous, 9 intermittent atrial fibrillation) to guide surgical decisions.

Main Results:

Surgery was not indicated in 3 patients with low-voltage electrograms.

Related Experiment Videos

Pulmonary vein or left atrial appendage activations were common.

A simple left atrial procedure (pulmonary vein isolation, left atrial incisions) cured 100% of 8 patients with passive right atrial activation.

A radial procedure cured 89% (31/35) of patients, with 10 requiring additional posterior left atrial ablation.

The simple left atrial procedure resulted in significantly less postoperative bleeding (378 mL vs 711 mL).

Atrial transport function was preserved in both groups.

Conclusions:

Intraoperative mapping enables personalized surgical strategies for atrial fibrillation.
This approach optimizes treatment efficacy and safety, potentially reducing invasiveness and complications.