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Cardiomegaly and cyanosis on exercise--the diagnosis of Ebstein anomaly.

PAUL WOOD wrote in his classic text, "I have personally catheterized seven cases of Ebstein's disease, but do not propose to catheterize another wittingly!"1 This comment reflects Dr. Wood's experience with lethal tachyarrhythmias while evaluating these patients. Now, fortunately, we not only are able to deal effectively with the high frequency of arrhythmias in this situation but we also have noninvasive methods for making the diagnosis. A case is presented to illustrate a clinical condition in which Ebstein anomaly should be considered and the diagnostic techniques used.