Annotation of late potentials comprising local abnormal ventricular activation (LAVA) signals

An apparatus for annotation of late potentials comprising abnormal ventricular activation signals, comprising:

• an interface, which is configured to:
• receive a bipolar signal sensed by a pair of electrodes at a location in a heart of a patient;
• receive one or more electrocardiogram (ECG) signals sensed by one or more body-surface electrodes attached to the patient;
• and
• a processor, which is configured to:
• identify in the bipolar signal two or more successive QRS complexes;
• detect in the bipolar signal one or more activations occurring within a window-of-interest that begins at least a given time with respect to the identified QRS complexes;
• check whether the one or more detected activations are late potentials, by verifying whether (i) the one or more activations do not coincide with a predefined event observed in the one or more ECG signals, and (ii) the one or more activations are repeatable in the successive QRS complexes;
• and
• in response to deciding that at least one of the one or more detected activations is a late potential, visualize the latest of the at least one of the one or more late potentials to a user.