The Relationship between Right Ventricular Pacing Voltage and QRS Complex Duration

Authors: V. Vančura, D. Wichterle, Marek Brabec, J. Bytešník, K. Lefflerová, J. Kautzner
Publication year: 2009
Publication type: Článek v odborném periodiku
Periodical: Physiological Measurement
Bibliographic citation: VANČURA, V., WICHTERLE, D., BRABEC, Marek, BYTEŠNÍK, J., LEFFLEROVÁ, K., KAUTZNER, J. The Relationship between Right Ventricular Pacing Voltage and QRS Complex Duration. Physiological Measurement. 2009, 30(5), 517-527. ISSN 0967-3334. E-ISSN 1361-6579
Dostupné z: doi:10.1088/0967-3334/30/5/008
DOI: 10.1088/0967-3334/30/5/008
ID: 324788

Abstract

The aim of our study was to describe the relation between the right ventricular pacing voltage and the QRS complex duration. Fourteen patients (73.6 ± 7.6 years) with AV block and implanted pacemakers were paced at a frequency of 100 bpm with various pacing voltages. A signal averaged QRS vector length was calculated at each degree of pacing voltage. The changes in the QRS complex duration were measured as a relative shift of the terminal region of the vectorcardiographic QRS complex (end-shift) and its most prominent peak (peak-shift) using the cross-correlation method. The nonlinear relationship between stimulation voltage and QRS duration was observed with the highest impact of stimulation voltage changes near the threshold value. The fourfold increase in the stimulation voltage above the threshold caused QRS complex shortening by 3.7 ± 2.1 ms (range 0.19 – 7.76 ms)