Medical devices having an atraumatic distal tip segment

A kit for the diagnosis or treatment of tissue in a body cavity, comprising:

• an introducer having an introducer body defining a lumen therethrough;
• and
• an electrophysiology catheter insertable through the lumen of the introducer body, the electrophysiology catheter comprising
• an elongated catheter body defining a lumen therethrough, the elongated catheter body having
• a proximal segment,
• a working segment located distally of the proximal segment, the working segment having a distal end and a generally circular configuration in an unbiased state, and
• a flexible distal tip segment adjacent the distal end of the working segment, the flexible distal tip segment having a proximal end and a distal end, the proximal end and the distal end being off-set from one another by an angle of between about 100 degrees to about 175 degrees via one of a pre-formed bend and a pre-formed curve;
• at least one of a cardiac sensing element and an energy delivery element disposed along an outer surface of the working segment;
• and
• a shape-memory wire extending through the lumen of the catheter body from the proximal segment and terminating at the distal end of the working segment,
• wherein the flexible distal tip segment exits a distal end of the introducer in a lateral direction relative to a longitudinal direction of the introducer body.