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Abstract
Objectives
To analyze natural history and clinical features of scoliosis developed after surgery for congenital heart disease and to investigate the influence of cardiac surgery on the onset and progression of scoliosis.
Materials and methods
Three hundred and five patients who had been operated for congenital heart disease from Jan.1988 to Dec.1990 and followed up for more than 5 years were analyzed. The curve which was more than 10˚ on radiography was defined as significant scoliosis and the patients with congenital spinal anomalies were excluded. We compared age at surgery, cardiac disease and effect of cyanosis between scoliosis and non- scoliosis group. Furthermore, in scoliosis group, prevalence, onset of significant scoliosis, and manifestation of curve according to side of thoracotomy were assessed.
Results
Fiftysix patients(18.4%) had scoliosis of more than 10˚. As for location, high thoracic in 19, thoracic in 23, double thoracic in 8, thoracolumbar in 5 and double major in 1. Of the 42 patients with thoracic or high thoracic curves, 17(40%) showed convexity to the left. The magnitudes of curves were less than 40 degrees except 1. There was no significant difference in prevalence(p=0.513) and Cobb angle(p=0.634) between cyanosis and acyanosis group. Scoliosis developed between 3 and 6 years after cardiac operation in 26 patients(46%). In high thoracic curve, 6 of 7 patients with left thoracotomy demonstrated convexity to the left and 5 of 6 patients with right thoracotomy demonstrated convexity to the right(p=0.026).
Conclusions
The prevalence of scoliosis after surgery for congenital heart disease was 18.4%. High thoracic and left thoracic curves were more frequent compared to idiopathic curves and a half of them developed 3 to 6 years after cardiac surgery. Most patients did not have severe curve to need surgical intervention and there was no correlation between severity of scoliosis and age at cardiac operation and cyanosis. In high thoracic curve, the tendency for the curve to be convex to the side of cardiac approach was demonstrated.
REFERENCES
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Figures and Tables%
Fig. 1.
Cobb angle at final followup. Fiftysix patients(18.4%) had scoliosis of more than 10 degrees. The magnitudes of curves were less than 40 degrees except one.
Fig. 2.
Comparison between cyanosis and acyanosis group. There is no significant difference in prevalence (p=0.513) between cyanosis and acyanosis group.
Fig. 3.
Onset of scoliosis. Newly developed scoliosis was detected in 26 patients(46%) between 3 and 6 years after cardiac operation. On the contrary, in only two cases, significant curve was detected before postoperative 3 years.
Fig. 4.
Curve patterns and convexity of scoliosis. Fifty(89%) of 56 patients had thoracic curves. High thoracic curve and left thoracic curve were observed more frequently than in idiopathic scoliosis.
Fig. 5.
Convexity of high thoracic curve according to side of incision. In high thoracic curve, the tendency for the curve to be convex to the side of cardiac approach was demonstrated.
Fig. 6-A.
Chest radiograph of 3 year and 6 month old boy. Two years before, he underwent shunt operation through left thoracotomy (via the fourth intercostal space) for the treatment of tetralogy of Fallot. Fig. 6-B. Chest radiograph which was made twelve years after surgery shows that left high thoracic curve has been developed newly. Its apex is located at T3 and has a convexity to the side of thoracotomy (left).
Table 1.
Cardiac diagnosis
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