[Dual-chamber rate responsive cardiac pacing].

The authors describe in this report their first experience with the implantation of a rate responsive, dual chamber pacemaker. They emphasize the advantages of this type of pacemakers: the maintenance of AV-synchrony and the rate increase in response to exercise. Meanwhile they call attention on the complexity of the ECG interpretation.

[Surgical management of aneurysm of the ascending aorta associated with aortic valve insufficiency].

Out of 318 aortic valve replacements performed between July 1, 1984 and June 30, 1989, aneurysm of the ascending aorta was found in 17 cases. In 7 of these cases employment of conduit was required due to the dimension of the aneurysm. In 5 cases they performed Bentall procedure: aortic valve replacement combined with conduit of the ascending aorta with the replantation of the coronaries.