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Features of double-chambered RV, or subinfundibular stenosis, in an unoperated 33-year-old patient shown by CMR. A, The RV appears hypertrophied in a 4-chamber view. B, However, the infundibular region (*) and the pulmonary valve above it are unobstructed. C, The level of obstruction is seen in a systolic short-axis image. The jet from the hypertrophied part of the RV to the infundibular cavity is arrowed.
