Inappropriate ventricular blanking in a DDI pacemaker.
The DDI mode is a new pacing mode with potential advantages over DVI pacing. We describe anomalous post R wave ventricular pacing due to the presence of inappropriate ventricular blanking periods in a pacemaker programmed to the DDI mode. Although no adverse consequences were seen in our patients, potentially dangerous R-on-T pacing could occur, particularly if long atrioventricular delays are programmed. A method for eliminating this pacing anomaly is described. Patients programmed to the DDI mode with the pacemaker model described should be evaluated for post R wave ventricular pacing and corrective measures should be taken.
D000368:Aged; D001919:Bradycardia / Q000628:therapy; D004562:Electrocardiography; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013610:Tachycardia / Q000628:therapy