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PubMed1986

[Bicameral stimulation in a case of corrected transposition of the great vessels].

A patient with Corrected Transposition of the Great Arteries (CTGA), mild incompetence of left A-V valve, complete atrioventricular block without associated anatomic lesions, in whom a bicameral permanent pace maker has been implanted, is described. The procedure of implantation did not present any particular problem; the stability of the electrocatheters was good. The exercise tolerance with DDD mode stimulation was normal and definitively better as compared to that achieved with ventricular stimulation at progressively higher stimulation frequency. The patient is now well and attending a normal physical activity.

Adult↗
PubMed1983

[Problems posed by preparation of the left ventricle for anatomical correction in simple transposition of the great vessels].

Surgical correction of simple transposition of the great arteries by arterial detransposition can only be considered if the left ventricle is capable of functioning under systemic conditions. This is possible at birth but the operation is too big for it to succeed. After a few weeks the left ventricle may lose this capacity but it can be induced to redevelop if it is given a systolic stress by pulmonary banding. This was attempted initially in 30 children aged from 5 weeks to 3,5 years old (20 aged less than 2 months) but had to be abandoned for the following reasons: 8 immediate failures due to severe hypoxia and acidemia, 7 left ventricular failures, mainly in 3 children operated after 6 months of age; 7 severe hypoxemias, 5 pulmonary arterial lesions due to banding and/or the systemo-pulmonary anastomosis associated in some cases; in all, there were 8 failures out of the 17 anatomical corrections performed to date in 22 survivors of banding. The criteria of left ventricular readaptation after banding were difficult to determine. The final result did not appear to be related to either the duration of banding, the degree of aortic desaturation, the ratio of ventricular pressures, or to the various echocardiographic indices. Only the initial hypoxemia (less than 50 p. 100 saturation) with respect to the risk of banding, and the age at which banding was performed (over 6 months) with respect to the risk of anatomical correction, appeared to be obvious risk factors. This is the reason for a new protocol at present under study to try to maintain left ventricular growth by banding in the first days of life, so to ensure a more harmonious and effective, and also less dangerous preparation for anatomical correction. Six new born children have been "prepared" in this way: three had adequate loose banding and underwent atrial correction. Very good results were obtained in the other three patients who have already undergone detransposition at 2,5 and 3 months with excellent immediate results. We believe that neonatal pulmonary banding (before 5 days) when aortic saturation after atrioseptostomy is over 50 p. 100, provides a real alternative to the classical methods of treating simple transposition of the great arteries (Mustard or Senning). Anatomical correction can then be carried out a few weeks later under good conditions.

Angiocardiography↗
PubMed1986

Ossification centre of the hyoid bone in complete transposition of great vessels, Ivemark asplenia syndrome, and Down's syndrome with congenital heart disease: correlation with the humeral capital epiphysis.

The incidence of radiographic visibility of the ossification centres of the body of the hyoid bone and of the humeral capital epiphysis in antero-posterior or lateral chest radiographs taken during the first month of life of 63 autopsied infants were analysed. The group comprised patients with Down's syndrome (DS) with congenital heart disease, 15; complete transposition of the great vessels (TGV), 10; Ivemark asplenia syndrome (IS), 17; and a control group of infants with congenital heart disease (CHD) who had none of the above conditions, nor tetralogy of Fallot, interrupted aortic arch, DiGeorge syndrome or hypoplastic left-heart complex, 31. The incidence of radiographically visible hyoid ossification centre (HOC) in the control group was 71% and of humeral capital epiphysis (HE), 16.1%. Autopsied infants with TGV, IS or DS with CHD showed increased visibility of HOC (100%); the incidence of visible HE was increased in neonates with IS (71.4%) and with TGV (50%). The differences in the incidence of radiographic visibility of HOC and HE in neonates with CHD, in this study and in others in the literature, appear to have diagnostic value.

Age Factors↗