Patent ID: 11903716
Assignee: MEDTRONIC CRYOCATH LP
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 19:
20. A method for mapping myocardial tissue, the method comprising:
positioning a distal portion of a mapping device within a pericardial space between a pericardium and the myocardial tissue, the distal portion being collapsed, the distal portion including:
a sheath including a distal portion, a proximal portion opposite the distal portion, and a lumen extending therebetween;
a distal assembly including:
an outer shell having a proximal portion and a distal portion;
at least one inflatable element within the outer shell, the at least one inflatable element and the outer shell being retractable within the lumen; and
an electrode assembly at least partially within the outer shell proximate the at least one inflatable element, the electrode assembly including a plurality of mapping electrodes;

a retention element coupled to the sheath distal portion; and
a stopper located distal to the distal assembly, the stopper being engageable with the retention element,

expanding the outer shell by inflating the at least one inflatable element, expansion of the outer shell exerting a force against electrode assembly to enhance contact between the plurality of mapping electrodes and the myocardial tissue; and
recording monophasic action potentials from the myocardial tissue.