1. Volume 10, Issue 1, Pages 16-21 (January 2013)
Reappraisal of classical electrocardiographic criteria in detecting accessory pathways with a strict para-Hisian location 
E. González-Torrecilla, MD, PhD, R. Peinado, MD, PhD, J. Almendral, MD, PhD, A. Arenal, MD, F. Atienza, MD, PhD, J. García Fernández, MD, PhD, F. Fernández-Avilés, MD, PhD 
Heart Rhythm 
Volume 10, Issue 1, Pages (January 2013)
DOI: /j.hrthm
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2. Figure 1
Left panel: Successful cryoablation pulse in a true para-Hisian accessory pathway (AP). The presence of a His bundle deflection was sought at the location of successful bypass ablation or shortly after the disappearance of ice artifacts during successful cryoablation. The mean amplitude of 3 consecutive His bundle deflections (H) was measured. Right panel: Intracavitary electrograms in a successful site prior to cryoapplication in the same patient. Line shows the onset of delta wave and the earliness of local ventriculogram (−16 ms) with AV continuity. From top to bottom: Surface ECG leads, distal pair of cryoablation catheter (Abl d), unipolar lead of distal ablation electrode (Uni d), high right atrium (HRA), and right ventricular apex (RVA).
Heart Rhythm  , 16-21DOI: ( /j.hrthm )
Copyright © 2013 Heart Rhythm Society Terms and Conditions

3. Figure 2
Top panels: The initial 40 ms of the QRS complex was used to determine delta-wave polarity and the presence of a negative delta wave in leads V1 and V2 in a patient with true para-Hisian accessory pathway (AP) (left panel). The amplitudes of initial r waves in these leads (arrows) are measured in patients with para-Hisian (middle panel) and anteroseptal (right panel) APs, respectively. Lower panels: Corresponding successful sites of the ablation (Abl) catheter for each case in fluoroscopic (left anterior oblique view) and 3-dimensional electroanatomic right atrial map (modified right anterior oblique view; NavX system, St Jude Medical, Endocardial Solutions Inc, St Paul, MN) images. Asterisk denotes His position in fluoroscopic images. CS = coronary sinus catheter. Other abbreviations as in Figure 1.
Heart Rhythm  , 16-21DOI: ( /j.hrthm )
Copyright © 2013 Heart Rhythm Society Terms and Conditions

4. Figure 3
Scatterplot showing the individual values of the sum of initial r-wave amplitudes in leads V1 and V2 in patients with true para-Hisian accessory pathway (n = 52) and control group (n = 53). Gray line indicates the selected cutoff point.
Heart Rhythm  , 16-21DOI: ( /j.hrthm )
Copyright © 2013 Heart Rhythm Society Terms and Conditions

5. Figure 4
Area under receiver-operator characteristic curve (0.85±0.039) for values of the sum of initial r-wave amplitudes in the first 2 precordial leads. The cutoff value of the maximizing levels of sensitivity and specificity was<0.5 mV.
Heart Rhythm  , 16-21DOI: ( /j.hrthm )
Copyright © 2013 Heart Rhythm Society Terms and Conditions