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Ann Thorac Surg 1997;64:721-729
© 1997 The Society of Thoracic Surgeons

Original Article: General Thoracic

Multiple Left Heart Obstructions (Shone's Anomaly) With Mitral Valve Involvement: Long-Term Surgical Outcome

Ron A. Brauner, MD, Hillel Laks, MD, Davis C. Drinkwater, Jr, MD, Frank Scholl, MD, Sharon McCaffery, MS

Division of Cardiothoracic Surgery, UCLA School of Medicine, Los Angeles, California

Background. The outcome of children with multilevel left heart obstructions (Shone's anomaly) is generally poor. Literature is scarce, consisting mainly of case reports. The mitral disease may be the predominant factor affecting outcome.

Methods. Surgical results in 19 consecutive patients are presented, with a median follow-up of 8 years. Mitral stenosis was present in all, with parachute deformity in 12 patients. Supramitral rings were found in 9 patients. Other features included subaortic stenosis (15 patients), valvar aortic stenosis (9), bicuspid aortic valve (16), and coarctation (13 patients). The patients underwent 46 surgical procedures, including 18 mitral operations (9 replacements, 9 repairs).

Results. There were three in-hospital (16%) and two late (10.5%) deaths. Of the 5 nonsurvivors, 4 patients (80%) had predominant mitral disease and moderate to severe pulmonary hypertension, versus 4 (28.5%) and 5 (36%) survivors, respectively (p = not significant). Valve repair was the final procedure in 9 survivors. The other 5 patients had repeated valve replacements (1), aortoventriculoplasty with valve replacements (2), or no mitral operation (2). Freedom from mitral reoperation was 78% (7 of 9 patients) after repair procedures and 43% (3 of 7 patients) after replacement. At follow-up, 10 patients (71.4%) are in New York Heart Association functional class I and the other 4 in class II and III. Six (43%) await reoperation due to recurrent aortic (4) or subaortic (1) stenosis and recoarctation (2). Echocardiography reveals mild mitral stenosis or regurgitation in 3 patients after repair (33%). Four are considered free of residual disease (21% of all).

Conclusions. Late outcome in Shone's anomaly seems to correlate with the predominance of mitral valve involvement and the degree of pulmonary hypertension. Valve repair is indicated whenever feasible and should be considered before the occurrence of pulmonary hypertension.


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Discussion
Ann. Thorac. Surg. 1997 64: 729. [Extract] [Full Text]



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