The patient has progressive prolongation of the HV interval and a stable AH interval with atrial pacing. This demonstrates the rare finding of infranodal Wenkebach-type block. The patiinet was treated with dual chamber pacemaker implant.

The patient has progressive prolongation of the HV interval and a stable AH interval with atrial pacing. This demonstrates the rare finding of infranodal Wenkebach-type block. The patinet was treated with dual chamber pacemaker implant and her symptoms resolved.