Patent ID: 8644918

Claim:
A system for classifying a detected tachycardia using measured atrial intervals and measured ventricular intervals, the system comprising: a detection enhancement circuit including: a first selection circuit including a set size circuit configured to determine a size of a set of atrial intervals and a size of a set of ventricular intervals based on a measured atrial or ventricular rate, the first selection circuit configured to select the set of atrial intervals from the measured atrial intervals according to the determined size of the set of atrial intervals and the set of ventricular intervals from the measured ventricular intervals according to the determined size of the set of ventricular intervals; a second selection circuit configured to select a subset of atrial intervals from the set of atrial intervals and a subset of ventricular intervals from the set of ventricular intervals, the second selection circuit including an interval exclusion circuit configured to exclude one or more intervals from the set of atrial intervals and the set of ventricular intervals based on predetermined exclusion criteria; a rate calculator configured to calculate an average atrial rate using the subset of atrial intervals and an average ventricular rate using the subset of ventricular intervals; and a tachycardia classification circuit configured to classify the detected tachycardia using the average atrial rate and the average ventricular rate.