Posture-induced disturbance of pertechnetate flow and I-123 iodohippurate transport in some renal graft recipients with hypertension.

Iodohippurate renography and rapid serial scintigrams with pertechnetate were done in 27 allograft recipients in supine and standing positions. Posture-dependent iodohippurate transport and/or disturbance of pertechnetate flow pattern was found in nine of those examined. Patients demonstrating these abnormalities were found to be hypertensive. We suggest a causal relationship between posttransplant hypertension and the described posture-induced alterations of tracer transit.