Renal artery stenosis: changes in intrarenal Doppler waveform following percutaneous transluminal angioplasty.
OBJECTIVE
To examine the extent of the changes in the intrarenal spectral waveform patterns after percutaneous transluminal angioplasty (PTA) and whether there is a correlation with the angiographic and clinical results.


METHODS
In 44 patients with 68 PTAs we analyzed the intrarenal spectral waveform regarding the existence of a tardus-parvus pattern before and after PTA.


RESULTS
In 51 of the 60 cases with a tardus-parvus pattern prior to PTA, a complete normalization of the spectral wave-form was noted. There was no correlation between the Doppler result after PTA and the angiographic and clinical result. In contrast there was a significant correlation between the Doppler result before PTA and the clinical outcome: patients with a normal intrarenal spectral waveform before PTA showed no improvement in their arterial hypertension.


CONCLUSIONS
Our results indicate that a patient with a normal spectral waveform analysis does not response to PTA. However, there is still an unpredictable clinical response even if a patient has an abnormal intrarenal spectral waveform prior to PTA and a complete normalization after PTA.
Stuhrmann
M
M
Radiologische Klinik, Klinikum Barmen, Universität Witten-Herdecke, Wuppertal, Germany.
Jahnke
T
T
Roefke
C
C
Cramer
B M
BM
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography; D000800:Angioplasty, Balloon; D001783:Blood Flow Velocity; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011300:Preoperative Care; D012078:Renal Artery Obstruction / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy*; D012680:Sensitivity and Specificity; D016896:Treatment Outcome; D018608:Ultrasonography, Doppler; D014654:Vascular Patency / Q000502:physiology