[Case reports of fistula formation between aortic pseudo-aneurysms and atria after Bentall's operation].

Fistula between aortic pseudo-aneurysm and atrium occurred in two patients ten or thirteen years after initial Bentall's operation. Their chief complaints were edema of lower extremity, oliguria and dyspnea. Because the pseudo-aneurysm and fistula was suspected by continuous murmur and echocardiogram, cardiac catheterization and aortography were performed to make accurate diagnosis. In these cases, both the fistula and the leakage at the site of initial anastomosis were repaired as soon as the diagnosis was made. To our knowledge, there have been no such reports of aortic pseudo-aneurysm penetrating into the atrium after Bentall's operation.