PT  - JOURNAL ARTICLE
AU  - Kenichi Nakajima
AU  - Hisashi Bunko
AU  - Akira Tada
AU  - Junichi Taki
AU  - Norihisa Tonami
AU  - Kinichi Hisada
AU  - Takuro Misaki
AU  - Takashi Iwa
TI  - Phase Analysis in the Wolff-Parkinson-White Syndrome with Surgically Proven Accessory Conduction Pathways: Concise Communication
DP  - 1984 Jan 01
TA  - Journal of Nuclear Medicine
PG  - 7--13
VI  - 25
IP  - 1
4099  - http://jnm.snmjournals.org/content/25/1/7.short
4100  - http://jnm.snmjournals.org/content/25/1/7.full
SO  - J Nucl Med1984 Jan 01; 25
AB  - Twenty-one patients with the Wolff-Parkinson-White (WPW) syndrome who underwent surgical division of the accessory conduction pathway (ACP) were studied by gated blood-pool scintigraphy. In each case, a functional image of the phase was generated, based on the fundamental frequency of the Fourier transform. The location of the ACP was confirmed by electrophysiologic study, epicardial mapping, and surgery. Phase analysis identified the side of preexcitation correctly in 16 out of 20 patients with WPW syndrome with a delta wave. All patients with right-cardiac type (N = 9) had initial contraction in the right ventricle (RV). In patients with left-cardiac type (N = 10), six had initial movement in the left ventricle (LV); but in the other four the ACPs in the anterior or lateral wall of the left ventricle (LV) could not be detected. In patients with multiple ACPs (N = 2), one right-cardiac type had initial contraction in the RV, while in the other (with an intermittent WPW syndrome) the ACP was not detected. These observations indicate that abnormal wall motion is associated with the conduction anomalies of the WPW syndrome. We conclude that phase analysis can correctly identify the side of initial contraction in the WPW syndrome before and after surgery. However, as a method of preoperative study, it seems difficult to determine the precise site of the ACP by phase analysis alone.