JOURNAL ARTICLE
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[Doppler echocardiography in the postoperative assessment of the arterial switch in the repair of transposition of the great arteries and double outlet right ventricle].

OBJECTIVE: To evaluate the usefulness of Doppler-echocardiography in the follow-up of anatomical repair in transposition of great arteries and double outlet of right ventricle.

PATIENTS AND METHODS: 108 Doppler-echo studies, in a follow-up protocol of the first 32 consecutive patients who successfully passed anatomical repair, were analyzed. The mean age for operation was 50 days (6-472 days) (25 patients before 21 days of age) with a mean follow-up time of 406 days (1 day-4.5 years). We studied subjective impression of left ventricular function and its quantification by systolic shortening fraction, the functioning of four heart valves; diagnosis and quantification of stenosis in arterial sutures of neoaorta and neopulmonary, the most useful windows and planes and, finally, the difficulties found during the examination.

RESULTS: Thirteen patients (41%) showed a low left ventricular shortening fraction, though 85% of these patients had anomalous ventricular septal motion. Neoaortic valve insufficiency was detected in 12 patients (37%) (mild in 10 and moderate in 2) and neopulmonary valve regurgitation in 14 patients (44%) (mild in 11 and moderate in 3). Stenosis of arterial sutures was detected in: 2 (6%) patients at neopulmonary artery and 1 (3%) at neoaortic artery. The biggest technical difficulty was found in the neopulmonary artery evaluation.

CONCLUSIONS: 1) Doppler echocardiography is an excellent method for anatomical and functional evaluation in these patients and is necessary in their follow-up evaluations; 2) Surgical results obtained in this series are good; 3) Left ventricle fractional shortening is misleading in the evaluation of ventricular function in these patients because of the high incidence of abnormal ventricular septal motion, and 4) The study of neopulmonary arteries is often very difficult.

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