Special Section Technical Briefs

In Vitro Evaluations of Cardiac Mapping Catheters Designs and Utilities: Employing Visible Heart® Methodologies1

[+] Author and Article Information
Megan M. Schmidt, Paul A. Iaizzo

Department of Biomedical Engineering,
University of Minnesota,
Minneapolis, MN 55455;
Department of Surgery,
University of Minnesota,
Minneapolis, MN 55455

Michael R. Franz

Cardiology Division,
Veteran Affairs and
Georgetown University
Medical Center,
Washington, DC 20007

Timothy G. Laske

Department of Surgery,
University of Minnesota,
Minneapolis, MN 55455;
Medtronic LLC,
Mounds View, MN 55112

Mark T. Stewart

Medtronic LLC,
Mounds View, MN 55112

DOI: 10.1115/1.4033150Manuscript received March 1, 2016; final manuscript received March 16, 2016; published online May 12, 2016. Editor: William Durfee.

J. Med. Devices 10(2), 020956 (May 12, 2016) (2 pages) Paper No: MED-16-1071; doi: 10.1115/1.4033150 History: Received March 01, 2016; Revised March 16, 2016

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Grahic Jump Location
Fig. 1

Endocardial catheter location is verified through fluoroscopy, while epicardial catheters can be seen directly on the surface of the heart

Grahic Jump Location
Fig. 2

Direct visualization of the modified 7 Fr mapping catheters in the right atrium (left) and right ventricular apex (right) of an isolated swine heart

Grahic Jump Location
Fig. 3

The Visible Heart® allows direct visualization of the device–tissue interface which can be used to evaluate prototypes designed to record MAPs. Shown here is a catheter with a poor device–tissue interface and MAPs elicited on only two of four channels, in addition to a catheter with good device–tissue interface and MAPs on all the four channels.

Grahic Jump Location
Fig. 4

Seven channels of atrial signal and electrocardiogram recorded using a catheter not optimized for MAP recordings (left) and an MAP4 catheter (right)



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