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Cardiovascular Research 2005 65(4):940-941; doi:10.1016/j.cardiores.2004.12.017
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Copyright © 2005, European Society of Cardiology

What is a monophasic action potential recorded by the Franz contact electrode?

Michael R. Franz*

Georgetown University Medical Center, Arrhythmia Service and Research, VA Medical Center, 50 Irving St, NW, 20422 Washington, DC, United States

* Tel.: +1 202 745 8389; fax: +1 202 339 0786. Email address: michael.r.franz@verizon.net

Received 26 November 2004; accepted 22 December 2004

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After over 20 years of successful use of the Franz contact electrode technique by many others and myself (over 1000 publications to date), the recent paper by Kondo et al. [1] claims that it is not the tip electrode, but rather the distant-from-tip or "indifferent" electrode that records the monophasic action potential (MAP). The introduction starts out by staging a contradiction between the classical MAP theory and the one stated by Franz [2] when in fact there is none really stated. The wording is confusing throughout their text and, in my view, of little help to foster the understanding of the complex . . . [Full Text of this Article]


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