Delay in time to peak of the right kidney from 4 minutes (baseline) to 12 minutes (ACE-I challenge).
Spit function:
Baseline: Left (49.6%), Right (50.4%)
ACE-I challenge: Left (54.2%), Right (45.8%)
Delay in time to peak activity in the affected kidney of more than 2 minutes when compared to the baseline study is considered highly probable for renovascular hypertension.