Method and apparatus for delivering anti-tachycardia pacing

A method comprising:

• detecting a ventricular tachyarrhythmia from a cardiac electrical signal device of a patient's heart;
• responsive to detecting the ventricular tachyarrhythmia, delivering a plurality of anti-tachycardia pacing (ATP) pulses at alternating ATP time intervals comprising at least a first ATP time interval separating a first pair of the plurality of the ATP pulses comprising a first ATP pulse and a second ATP pulse consecutively following the first ATP pulse at the first ATP time interval, a second ATP time interval separating a second pair of the plurality of ATP pulses comprising the second ATP pulse and a third ATP pulse consecutively following the second ATP pulse at the second ATP time interval, the second ATP time interval being different than the first ATP time interval and consecutively following the first ATP time interval, and a fourth ATP pulse consecutively following the third ATP pulse at the first ATP time interval.

A non-transitory computer-readable medium storing a set of instructions which when executed by a control circuit of a medical device, cause the medical device to:

• detect a ventricular tachyarrhythmia from a cardiac electrical signal;
• responsive to the detected ventricular tachyarrhythmia, control a therapy delivery circuit of the medical device to deliver a plurality of anti-tachycardia pacing (ATP) pulses at alternating ATP time intervals comprising at least a first ATP time interval separating a first pair of the plurality of the ATP pulses comprising a first ATP pulse and a second ATP pulse consecutively following the first ATP pulse at the first ATP time interval, a second ATP time interval separating a second pair of the plurality of ATP pulses comprising the second ATP pulse and a third ATP pulse consecutively following the second ATP pulse at the second ATP time interval, the second ATP time interval being different than the first ATP time interval and consecutively following the first ATP time interval, and a fourth ATP pulse consecutively following the third ATP pulse at the first ATP time interval.