Ectopic-triggered para-his stimulation

A method comprising:

• detecting, using a medical device, a first premature ventricular contraction (PVC) of a heart in the absence of a diagnosed tachyarrhythmia episode;
• detecting, using the medical device, an indication of a first origin of the first PVC of the heart;
• delivering, using the medical device, a first electrostimulation to a location at or near a His bundle and in response to the detecting the first PVC;
• detecting, using the medical device, a subsequent second PVC of the heart in the absence of a diagnosed tachyarrhythmia episode and within a specified first time interval of detecting the first PVC of the heart;
• detecting, using the medical device, an indication of a second origin of the second PVC of the heart;
• comparing the indication of the detected first origin and the indication of the detected second origin, and:
• when the indication of the detected second origin is about the same as indication of the first detected origin, delivering, using the medical device, a second electrostimulation to the location at or near the His bundle using a first electrostimulation parameter of the medical device;
• and
• when the indication of the detected second origin differs from the indication of the detected first origin by greater than a threshold amount, delivering, using the medical device, the second electrostimulation to the location at or near the His bundle using a second electrostimulation parameter of the medical device.