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Ann Thorac Surg 1990;49:887-893
© 1990 The Society of Thoracic Surgeons

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Articles

Shone's anomaly: Operative results and late outcome

Sections of Thoracic Surgery and Pediatric Cardiology, The University of Michigan Medical School, Ann Arbor, Michigan USA

^_* Address reprint requests to Dr Bolling, University of Michigan Hospitals, 1500 E Medical Center Dr, 2120 TC/0344, Ann Arbor, MI 48109.

Shone's anomaly, a congenital cardiac malformation, consists of multiple levels of left heart obstruction including supravalvar mitral ring, parachute mitral valve, subaortic stenosis, and coarctation. The prognosis for patients with Shone's anomaly is poor. To assess operative results and late outcome, we reviewed the records of 30 consecutive patients seen with Shone's anomaly at our institution between 1966 and 1989. Anatomical diagnoses in these patients were supravalvar mitral ring (22 patients), mitral valve abnormalities including parachute mitral valve, fused chordae, or single papillary muscle (26 patients), subaortic gradients (26 patients), and coarctation (29 patients). Nineteen patients had all four lesions. Other common defects were bicuspid aortic valve (19 patients) and ventricular septal defect (20). Two patients were treated medically. The other 28 patients required 84 operative procedures with 18 patients undergoing more than one procedure. Operations included coarctation repair (28 patients), mitral valve repair or replacement (11), ventricular septal defect closure (8), subaortic resection (8), and complex left ventricular outflow tract reconstruction or bypass (4). Age at first operition ranged from 7 days to 7 years (median age, 3 months). There were no operative deaths at the first operation. However, mortality rose to 24% (4/17) after the second operation. All operative deaths were secondary to severe mitral valve disease. The survivors have been followed from 1 to 16 years (mean follow-up, 6 ± 1 years). There were no late or sudden deaths. Morbidity has included stroke (1), gastrointestinal bleeding (2), permanent heart block (1), and persistent congestive heart failure (6). We conclude that although patients with Shone's anomaly are seen with a wide spectrum of major anatomical and hemodynamic abnormalities, a satisfactory long-term outcome is possible for most. Operative mortality is adversely affected by the severity of mitral valve disease and the need for multiple operative procedures.

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