FIELD: medicine.
SUBSTANCE: invention refers to medical equipment. A catheter comprises an elongated body, a distal assembly mounted distally in relation to the body and having a shape-memory support member and a spiral or round cast comprising an irrigated ablation ring electrode. The catheter comprises the ring electrode for measuring an impedance or potentials of a pulmonary vein and a control handle mounted proximally in relation to the body. The spiral cast has such axial configuration that a central long axis of the spiral cast is axially aligned with a long axis of the body. The round cast has such configuration outside the edge that the round cast is spiralled about the long axis of the body. The support member is hollow and comprises a hollow spiral tube or tubular member spirally notched along its length. The spiral notches have an interlacing pattern.
EFFECT: using the invention enables providing more accurate contact of the catheter and tissue and precise visualisation of the electric potential of the pulmonary vein during the ablation procedure.
9 cl, 22 dwg
