Catheter, cardiac pacemaker and method of pacing
Universal lesion and recording electrode system
Percutaneous lead having radially adjustable electrode
Catheter for mapping and ablation and method therefor
Temperature controlled RF coagulation
Endocardial mapping and ablation system and catheter probe
Device and method for multi-phase radio-frequency ablation Patent #: 5383917
ApplicationNo. 318427 filed on 10/05/1994
US Classes:607/102, With temperature sensing606/31, With thermal control means606/42, With switching or power control607/101, Microwave or RF (high frequency)607/122, Catheter or endocardial (inside heart) type607/154High frequency radiation type
ExaminersPrimary: Kamm, William E.
Assistant: Schaetzle, Kennedy J.
Attorney, Agent or Firm
International ClassA61N 005/00
AbstractMulti-phase RF ablation employing a two-dimensional or three-dimensional electrode array produces a multitude of currents paths on the surface of the ablation zone. This results in a uniform lesion with a size defined by the span of the electrode array. An orthogonal electrode catheter array suitable for cardiac ablation is used in conjunction with a two-phase RF power source to produce uniform square-shaped lesions of size 1.2 cm2. Lesions of larger size are created by successive adjacent placement of the square-shaped lesions. A temperature sensor at the electrode tip allows monitoring of ablation temperature and regulation of thereof to minimize the electrode tips from being fouled by coagulum.
Field of SearchPlaced in body
Catheter or endocardial (inside heart) type
Electrical energy applied through plural paths
High frequency radiation type
Microwave or RF (high frequency)
With temperature sensing
With thermal control means
With switching or power control