TY - JOUR
T1 - Measurement of the AH and HV interval and His bundle duration
T2 - Interobserver and intraobserver variation
AU - McAnulty, John H.
AU - Nichol, W. Paul
AU - Morris, Cynthia
AU - Nichol, Linda
AU - Rahimtoola, Shahbudin H.
N1 - Funding Information:
From the Department of Medicine, Division of Cardiology, Oregon Health Sciences University, Portland, Oregon, and the Department of Medicine, Division of Cardiology, University of Southern California, Los Angeles, California. This study was supported in part by research grants from the Medical Research Foundation of Oregon and Grants HL21527 and HL06336 from the National Institutes of Health, Bethesda, Maryland. Manuscript received April 29,1985; revised manuscript received Sep- tember 23,1985, accepted September 25,1985.
PY - 1986/4/15
Y1 - 1986/4/15
N2 - Conduction system intervals measured during intracardiac electrophysiologic testing influence clinical decisions. To evaluate measurement reliability, interobserver and intraobserver variation for AH, HV, and His bundle duration measurements from 50 patients were evaluated. The square of the correlation coefficient (r2) was used as the index for measurement reliability. Three investigators performed the measurements. The r2 for interobserver variation of the AH interval ranged from 0.55 to 0.68 and for intraobserver variability from 0.60 to 0.88. The standard error of measurement based on intraobserver measurements ranged from 10.2 to 18.0 ms. The r2 for interobserver variation of the HV interval ranged from 0.42 to 0.63 and for intraobserver variation from 0.489 to 0.73. The standard error of measurement was 6.2 to 9.9 ms. For the His bundle duration, the r2 for interobserver variation ranged from 0.42 to 0.52 and for intraobserver variation from 0.19 to 0.52. The standard error of measurement was 3.1 to 5.2 ms. Although there is measurement variation for AH and HV intervals, their use in conjunction with the history and the surface electrocardiogram to make clinical decisions is appropriate. His bundle duration cannot be measured reliably using the standard recording technique and should not be used for clinical decision making.
AB - Conduction system intervals measured during intracardiac electrophysiologic testing influence clinical decisions. To evaluate measurement reliability, interobserver and intraobserver variation for AH, HV, and His bundle duration measurements from 50 patients were evaluated. The square of the correlation coefficient (r2) was used as the index for measurement reliability. Three investigators performed the measurements. The r2 for interobserver variation of the AH interval ranged from 0.55 to 0.68 and for intraobserver variability from 0.60 to 0.88. The standard error of measurement based on intraobserver measurements ranged from 10.2 to 18.0 ms. The r2 for interobserver variation of the HV interval ranged from 0.42 to 0.63 and for intraobserver variation from 0.489 to 0.73. The standard error of measurement was 6.2 to 9.9 ms. For the His bundle duration, the r2 for interobserver variation ranged from 0.42 to 0.52 and for intraobserver variation from 0.19 to 0.52. The standard error of measurement was 3.1 to 5.2 ms. Although there is measurement variation for AH and HV intervals, their use in conjunction with the history and the surface electrocardiogram to make clinical decisions is appropriate. His bundle duration cannot be measured reliably using the standard recording technique and should not be used for clinical decision making.
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U2 - 10.1016/0002-9149(86)90739-3
DO - 10.1016/0002-9149(86)90739-3
M3 - Article
C2 - 3962896
AN - SCOPUS:0022454736
SN - 0002-9149
VL - 57
SP - 960
EP - 963
JO - The American journal of cardiology
JF - The American journal of cardiology
IS - 11
ER -