Phase analysis in the Wolff-Parkinson-White syndrome with surgically proven accessory conduction pathways: concise communication
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.
- Research Organization:
- Kanazawa Univ., Japan
- OSTI ID:
- 5299384
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 25:1
- Country of Publication:
- United States
- Language:
- English
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HEART
DYNAMIC FUNCTION STUDIES
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TECHNETIUM 99
ALGORITHMS
CARDIOVASCULAR DISEASES
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BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
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COUNTING TECHNIQUES
DIAGNOSTIC TECHNIQUES
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HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
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MATHEMATICAL LOGIC
NUCLEI
ODD-EVEN NUCLEI
ORGANS
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
RADIOISOTOPE SCANNING
RADIOISOTOPES
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550601* - Medicine- Unsealed Radionuclides in Diagnostics
550900 - Pathology