maze procedure


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mini-maze procedure

A procedure used to manage atrial fibrillation; the term maze refers to the maze-like incisions made in the atria, which eliminate AF as the resulting scars block abnormal (atrial macroreentry) electrical circuits. The procedure prevents AF in 90% of patients and preserves sinus rhythm; post-surgical morbidity and mortality of the classic procedure is relatively high.
 
Method
All of the maze procedures consist of creating long and complex linear lesions in both atria to channel impulses along narrow pathways. Traditionally, maze and smaller mini-maze procedures require cutting and an endocardial approach; more recently, some permutations have included epicardial approach, beating heart procedures and microwave or radiofrequency ablation (RFA). The current gold standard is epicardial, RFA and beating heart, all of which reduce operative time, mortality and morbidity, and time to patient discharge.

maze procedure

Cox procedure Heart surgery A procedure used to manage A Fib. See Atrial fibrillation. Cf Corridor procedure.

MAZE procedure

A surgical treatment for atrial fibrillation, in which the right and left pulmonary veins are isolated and the left atrial appendix is surgically removed. Incisions are made to disrupt the irregular fibrillatory flow of electricity through the atrium, constructing a path shaped like a labyrinth, which directs energy solely from the sinoatrial node to the atrioventricular node. The procedure is often performed during other heart surgeries, e.g., coronary artery bypass grafting.
See also: procedure
References in periodicals archive ?
Saline irrigated cooled tip radiofrequency ablation is an effective technique to perform the maze procedure.
Left versus bi-atrial intraoperative saline irrigated radiofrequency modified maze procedure for atrial fibrillation.
Moreover, since the laser can be delivered through a 600-micron optical fiber, it represents a giant leap toward performing the Maze procedure through the stand-alone, minimally invasive (closed-chest, beating heart) surgery.
The market for AF treatment through the concomitant open-chest Maze procedure is close to $250 million, while the minimally invasive treatment market for AF (stand-alone solutions for closed-chest, beating heart treatment) represents a $1.
Medtronic plans to begin a clinical trial this fall to collect data about the Cardioblate BP System's effectiveness in the Maze procedure for the treatment of chronic atrial fibrillation (AF), one of the world's most common and difficult-to-treat cardiac arrhythmias.
In another development related to the Maze procedure, Medtronic has signed an agreement with Kapp Surgical Instruments Inc.
The technology is used to ablate AF by creating long, thin, linear lesions in the atrium of the heart, replicating the curative lines of scar created by the surgical maze procedure.
Performance of goldfish trained in allocentric and egocentric maze procedures suggests the presence of a cognitive mapping system in fishes.
Equivalence of working memory performance for rats and humans was shown in radial maze procedures such as 17-arm paper-pencil tasks (O'Connor & Glassman, 1993) and in 7-, 13-and 8-arm walkabout mazes (Glassman, Garvey, Elkins, Kasal, & Couillard, 1994; Glasman, Leniek, & Haegerich, 1998).
GABAmimeitc agents display anxiolytic-like effects in the social interaction and elevated plus maze procedures.