Biostimulator having resilient scaffold

A biostimulator system, comprising:

• a catheter having an inner lumen;
• and
• a biostimulator disposed in the inner lumen, wherein the biostimulator includes
• a housing having a longitudinal axis and an electronics compartment containing a processor configured to stimulate a target tissue, and
• a header assembly mounted on the housing, wherein the header assembly includes
• a helical fixation element extending distally from the housing and including a piercing tip having a sharpened point to pierce target tissue, and
• an elongated member extending distally from the housing, wherein the elongated member includes an electrode electrically connected to the processor to stimulate the target tissue, and a piercing element to anchor the electrode against the target tissue, wherein the piercing element includes a barb extending from the elongated member to engage the target tissue, and wherein the electrode is longitudinally distal to the piercing tip, both when the biostimulator is in an undeployed state with the helical fixation element unattached to the target tissue and when the biostimulator is in a deployed state with the helical fixation element attached to the target tissue.

A method, comprising:

• advancing a distal region of a catheter into a chamber of a heart, wherein the distal region has an inner lumen containing a biostimulator, wherein the biostimulator includes a housing having a longitudinal axis and an electronics compartment containing a processor configured to stimulate a target tissue of the heart, and a header assembly mounted on the housing, wherein the header assembly includes a helical fixation element extending distally from the housing and including a piercing tip having a sharpened point to pierce target tissue, and an elongated member extending distally from the housing, and wherein the elongated member includes an electrode electrically connected to the processor to stimulate the target tissue, and a piercing element to anchor the electrode against the target tissue, wherein the piercing element includes a barb extending from the elongated member to engage the target tissue, and wherein the electrode is longitudinally distal to the piercing tip, both when the biostimulator is in an undeployed state with the helical fixation element unattached to the target tissue and when the biostimulator is in a deployed state with the helical fixation element attached to the target tissue;
• and
• deploying the biostimulator from the distal region, wherein when the biostimulator is deployed the biostimulator is in a deployed state such that the piercing element is engaged to the target tissue and the electrode is in contact with the target tissue.