Efficient delivery of multi-site pacing

A pacing device comprising:

• a set of electrodes including first and second left ventricular electrodes spatially separated from one another and a right ventricular electrode, all coupled to an implantable pulse generator;
• and
• a processing circuit coupled to the implantable pulse generator, the processing circuit configured to determine whether a ventricular tachycardia is occurring and if so to trigger the pulse generator to switch from a first pacing mode to a second pacing mode, the first pacing mode comprising delivering only a first pacing pulse to a left ventricle (LV) and thereafter delivering an RV pacing pulse to the right ventricular electrode within a single cardiac cycle and the second pacing mode comprising delivering first and a second pacing pulses to the LV and thereafter delivering an RV pacing pulse to the right ventricular electrode within a single cardiac cycle.

A pacing device comprising:

• a set of electrodes including first and second left ventricular electrodes spatially separated from one another and a right ventricular electrode, all coupled to an implantable pulse generator;
• and
• a processing circuit coupled to the implantable pulse generator, the processing circuit configured to determine whether less than a defined interval of time has elapsed since delivery of a defibrillation pulse from an implantable cardiac defibrillator and if so, to trigger the pulse generator to switch from a first pacing mode to a second pacing mode, the first pacing mode comprising delivering only a first pacing pulse to a left ventricle (LV) and thereafter delivering an RV pacing pulse to the right ventricular electrode within a single cardiac cycle and the second pacing mode comprising delivering first and a second pacing pulses to the LV and thereafter delivering an RV pacing pulse to the right ventricular electrode within a single cardiac cycle.

A method comprising:

• determining, with an implantable medical device, whether a ventricular tachycardia is occurring, and if so,
• triggering a pulse generator to switch from a first pacing mode to a second pacing mode, the first pacing mode comprising delivering only a first pacing pulse to a left ventricle (LV) and thereafter delivering an RV pacing pulse to a right ventricular electrode within a single cardiac cycle and the second pacing mode comprising delivering first and a second pacing pulses to the LV and thereafter delivering an RV pacing pulse to the right ventricular electrode within a single cardiac cycle.

A method comprising:

• determining whether less than a defined interval of time has elapsed since delivery of a defibrillation pulse from an implantable cardiac defibrillator and if so, triggering a pulse generator to switch from a first pacing mode to a second pacing mode, the first pacing mode comprising:
• delivering only a first pacing pulse to a left ventricle (LV) and thereafter delivering an RV pacing pulse to a right ventricular electrode within a single cardiac cycle and the second pacing mode comprising delivering first and a second pacing pulses to the LV and,
• thereafter delivering an RV pacing pulse to the right ventricular electrode within a single cardiac cycle.