Complete heart block complicating retrograde left-heart catheterization of patients with cardiac allografts

The development of complete heart block during left-sided cardiac catheterization is an uncommon event. We describe three cases of complete heart block complicating leftsided cardiac catheterization of patients with cardiac allografts. Review of the cases performed at our institution suggests that complete heart block during left-sided cathe-terization may be more common in patients with cardiac allografts. © 1992 Wiley-Liss, Inc.