System and method for assessing dimensions and eccentricity of valve annulus for trans-catheter valve implantation

A method for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the method comprising:

• loading a balloon catheter in a delivery system, the balloon catheter comprising:
• a balloon extending in a longitudinal direction and having an interior surface;
• a shaft extending in the longitudinal direction within the balloon;
• a first pair of drive electrodes on the interior surface of the balloon;
• a second pair of drive electrodes on the interior surface of the balloon;
• a first sense electrode pair on the shaft;
• and
• a second sense electrode pair on the shaft;
• delivering the balloon catheter to the native valve annulus;
• deploying the balloon catheter within the native valve annulus so that the balloon conforms to a surface of the native valve annulus;
• applying a first current to the first pair of electrodes to produce a first electrical field;
• applying a second current to the second pair of electrodes to produce a second electrical field;
• detecting the first electrical field with the first and second sense electrode pair;
• detecting the second electrical field with the first and second sense electrode pair;
• and
• determining one or more dimensions of the native valve annulus based at least on the detected first electrical field and the detected second electrical field.

A method for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the method comprising:

• receiving, with one or more processors, first voltage values from a first sense electrode pair on a shaft of a balloon catheter, the first sense electrode pair being configured to detect a first electrical field produced by a first pair of drive electrodes and a second electrical field produced by a second pair of drive electrodes;
• receiving, with the one or more processors, second voltage values from a second sense electrode pair on the shaft of the balloon catheter, the second sense electrode pair being configured to detect the first electrical field and the second electrical field;
• determining, with the one or more processors, a major axis length of the native valve annulus based on the first and second voltage values;
• determining, with the one or more processors, a minor axis length of the native valve annulus based on the first and second voltage values;
• and
• determining, with the one or more processors, an eccentricity of the native valve annulus based on the determined major axis length and the determined minor axis length.

A method for determining the dimensions and geometry of a native valve annulus for trans-catheter valve implantation, the method comprising:

• loading a balloon catheter in a delivery system, the balloon catheter comprising:
• a balloon extending in a longitudinal direction;
• a shaft extending in the longitudinal direction within the balloon;
• a plurality of splines connected to the shaft;
• a first pair of electrodes on a first pair of the splines;
• and
• a second pair of electrodes on a second pair of the splines;
• delivering the balloon catheter to the native valve annulus;
• deploying the balloon catheter at a first longitudinal position within the native valve annulus so that the balloon conforms to a surface of the native valve annulus at the first longitudinal position;
• deploying the plurality of splines so that the splines move radially outward from the shaft;
• applying a first current to the first pair of electrodes to produce a first electrical field;
• measuring, using the second pair of electrodes, values associated with the first electrical field;
• applying a second current to the second pair of electrodes to produce a second electrical field;
• measuring, using the first pair of electrodes, values associated with the second electrical field;
• and
• determining one or more dimensions of the native valve annulus based at least on the values associated with the first electrical field and the second electrical field.