[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.