Monophasic-enabled catheter with microelectrodes and method of using same for local detection of signals
OwnerKeshava Datta, Anand R. Rao +2inventors
InventorsKeshava Datta, Anand R. Rao, Rajesh Pendekanti, Kristine Fuimaono
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Abstract
A catheter having an ablation electrode with at least one microelectrode configured to sense monophasic action potential signals and a force sensor configured to sense contact force of the microelectrode against tissue surface, may be used to acquire pre-ablation MAP signals with monophasic characteristics and post-ablation MAP signals to determine presence or absence of monophasic characteristics in the latter in assessing quality or success of ablation procedure and lesion formation.
Claims13
A catheter comprising:
- an elongated catheter shaft;
- a distal section, including;
- an ablation electrode having a side wall and an outer surface, the side wall having at least one bore;
- at least one microelectrode configured to sense monophasic action potential signals having a distal sensing portion that protrudes from the outer surface of the electrode and a proximal portion extending through the one bore.
- a force sensor configured to sense contact force of the at least one microelectrode against tissue surface.
A method of using a catheter with multiple microelectrodes, comprising:
- positioning catheter with one or more microelectrodes in tissue contact at a first location along a desired ablation pattern;
- acquiring pre-ablation MAP signals as sensed by the one or more microelectrodes at the first location, the MAP signals having monophasic characteristics;
- performing ablation with the catheter at the first location;
- acquiring post-ablation MAP signals as sensed by the microelectrodes at the first location;
- and
- repositioning the catheter with the one or more microelectrodes in tissue contact at a second location along the desired ablation pattern solely when the post-ablation MAP signals are devoid of the monophasic characteristics.
Dependencies are inferred from the claim text.