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  • Title: Echocardiographic diagnosis of coronary sinus type atrial septal defect. A case report.
    Author: Del Bene MR, Barletta G.
    Journal: Minerva Cardioangiol; 1997 Jun; 45(6):315-8. PubMed ID: 9374080.
    Abstract:
    BACKGROUND: Coronary sinus type atrial defect is the result of an incomplete formation of the atriovenous fold. This is a rare anomaly that in a very few cases took advantage of echocardiographic diagnosis before surgery. We report on a case of coronary sinus type atrial septal defect diagnosed by means of transthoracic and transesophageal echocardiography. PATIENT: A 65 year old woman who was admitted to hospital for evaluation of dyspnea and pre-syncope. A diagnosis of secundum type atrial septal defect had been achieved few months before. METHOD DESCRIPTION: Color Doppler transthoracic echocardiography demonstrated evidence of left-to-right shunt through the coronary sinus-left atrium common wall, while transesophageal echocardiography showed a defect in the coronary sinus roof in its terminal portion, proximal to the atrial septum. At that level the shunt flow was demonstrated by the presence of a negative contrast after contrast injection. Both transthoracic and transesophageal contrast echocardiographies demonstrated the persistence of a left superior vena cava draining into the enlarged coronary sinus: the existence of a right-to-left shunt at the coronary sinus level suggested by transthoracic echocardiographic examination was not confirmed by transesophageal echocardiography. CONCLUSIONS: This is one of the few reported cases of coronary sinus type atrial defect diagnosed noninvasively and the diagnostic usefulness of both transthoracic and transesophageal echocardiographic approaches is stressed.
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