A method (1000-1002) for automatically discriminating between a supraventricular tachycardia event and a ventricular tachycardia event is provided. The method includes sensing a first cardiac signal (100) using a first electrode pair (62, 56) and a second cardiac signal (200) using a second electrode pair (36, 38) during a heartbeat, applying a first algorithm to the first cardiac signal (100) to determine whether the first cardiac signal (100) is indicative for a supraventricular tachycardia or indicative for the ventricular tachycardia; applying a second algorithm to the second cardiac signal (200) to determine whether the second cardiac signal (200) is indicative for the supraventricular tachycardia or indicative for the ventricular tachycardia, the second comparison algorithm being different from the first comparison algorithm; and assigning to a heartbeat-specific indicator a first value (vt) indicative for the ventricular tachycardia when at least one of the first cardiac signal (100) and the second car
