Method and device for managing pacing therapy based on interventricular septal activity

A system for managing a pacing therapy, the system comprising:

• electrodes;
• an implantable medical device (IMD) that comprises:
• sensing circuitry coupled to the sensing circuitry configured to collect cardiac activity (CA) signals from a first sensing vector and a second sensing vector, the second sensing vector having at least one different sensing electrode;
• the system further comprising one or more processors configured to implement program instructions to:
• measure corresponding activation times of cardiac signals between the first and second sensing vectors;
• calculate a septum to RV activation time (SRAT) based on the activation times;
• and
• adjust an AVSRAT delay based on the SRAT,
• the IMD further comprising:
• memory configured to store the AVSRAT delay and
• circuitry configured to deliver the pacing therapy based on the AVSRAT delay as adjusted to improve cardiac performance.