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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Arq+Bras+Cardiol
2016 ; 107
(4
): 331-338
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Accuracy of the Electrocardiogram in Localizing the Accessory Pathway in Patients
with Wolff-Parkinson-White Pattern
#MMPMID27627222
Teixeira CM
; Pereira TA
; Lebreiro AM
; Carvalho SA
Arq Bras Cardiol
2016[Oct]; 107
(4
): 331-338
PMID27627222
show ga
BACKGROUND: There are currently several electrocardiographic algorithms to locate
the accessory pathway (AP) in patients with Wolff-Parkinson-White (WPW) syndrome.
OBJECTIVE: To compare the ability of electrocardiographic algorithms in
identifying the location of the AP in patients with WPW pattern referred for
ablation. METHODS: Observational, cross-sectional, retrospective study with 111
patients with WPW syndrome referred for AP ablation. The electrocardiogram (ECG)
obtained prior to the ablation was analyzed by an experienced observer who
consecutively applied seven algorithms to identify non-invasively the AP. We then
compared the location estimated with this assessment with that obtained in the
electrophysiological study and calculated the agreement rates. RESULTS: Among the
APs, 59 (53.15%) were distributed around the mitral annulus and the remaining 52
(46.85%) were located around the tricuspid annulus. The overall absolute accuracy
of the algorithms evaluated varied between 27% and 47%, increasing to between 40%
and 76% when we included adjacent locations. The absolute agreement rate by AP
location was 2.00-52.20% for septal APs (n = 51), increasing to 5.90-90.20% when
considering adjacent locations; 7.70-69.20% for right APs (n = 13), increasing to
42.90-100% when considering adjacent locations; and 21.70-54.50% for left APs (n
= 47), increasing to 50-87% when considering adjacent locations. CONCLUSION: The
agreement rates observed for the analyzed scores indicated a low discriminative
ability of the ECG in locating the AP in patients with WPW.