Key result
Multidirectional capture mapping identifies occult slow conduction zones in adenosine-sensitive atrial tachycardia.
Why the study?
Para-Hisian adenosine-sensitive atrial tachycardia involves a functional slow conduction zone that is not directly visualized on local activation time maps, requiring advanced mapping techniques for identification.
Multidirectional capture mapping may be utilized to infer the presence and orientation of a functional slow conduction zone in adenosine-sensitive atrial tachycardia that is not directly visualized on local activation time maps.
Answers are grounded in this paper and cite their sources.
May aid mapping of adenosine-sensitive atrial tachycardia; hypothesis-generating pending prospective validation.
Para-Hisian adenosine-sensitive atrial tachycardia (AT) is a reentrant supraventricular tachycardia that reproducibly terminates with low-dose adenosine or adenosine 5′-triphosphate (ATP), with the earliest atrial activation site (EAAS) often recorded near the His bundle.1,2 Multidirectional capture mapping, as proposed by Yamabe and colleagues, uses orthodromic and antidromic capture of the EAAS from different pacing sites to infer the presence and orientation of a functional slow conduction zone (SCZ) that is not directly visualized on local activation time (LAT) maps.
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Gokan et al. (2026) studied Para-Hisian adenosine-sensitive atrial tachycardia (AT). Multidirectional capture mapping was evaluated. Multidirectional capture mapping can infer the presence and orientation of a functional slow conduction zone in adenosine-sensitive atrial tachycardia that is not visualized on local activation time maps.
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