An implantable cardioverter/defibrillator includes a tachycardia detection system that detects one-to-one (1:1) tachycardia, which is a tachycardia with a one-to-one relationship between atrial and ventricular contractions. When the 1:1 tachycardia is detected, the system discriminates ventricular tachycardia...http://www.google.com/patents/US7203535?utm_source=gb-gplus-sharePatent US7203535 - System and method for classifying tachycardia arrhythmias having 1:1 atrial-to-ventricular rhythms
