title: Two pacing spikes on the QRS complex in a single-chamber pacemaker.
abstract: AutoCapture algorithm helps the pacemakers to automatically adjust output close to the pacing threshold. This algorithm monitors the evoked response signal of myocardial depolarization, and delivers a high output back-up pulse if there is a loss of capture. This case, with two pacemaker spikes on the QRS complexes in a patient with VVI pacemaker, simulating a sensing failure, demands clear understanding of AutoCapture function before labeling the pacemaker malfunction.
authors.affiliation: Department of Cardiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India. drdineshchoudhary8@gmail.com
authors.forename: Dinesh
authors.initials: D
authors.lastname: Choudhary
authors.forename: Shunmuga
authors.initials: S
authors.lastname: Sundaram
authors.forename: Anees
authors.initials: A
authors.lastname: Thajudeen
authors.forename: Narayanan
authors.initials: N
authors.lastname: Namboodiri
mesh_terms: D000465:Algorithms; D001331:Automation; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D004868:Equipment Failure; D005071:Evoked Potentials; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D012804:Sick Sinus Syndrome / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors