M. Stuhrmann et al., RENAL-ARTERY STENOSIS - CHANGES IN INTRARENAL DOPPLER WAVE-FORM FOLLOWING PERCUTANEOUS TRANSLUMINAL ANGIOPLASTY, Cardiovascular and interventional radiology, 21(5), 1998, pp. 380-385
Purpose: To examine the extent of the changes in the intrarenal spectr
al 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 intrare
nal spectral waveform regarding the existence of a tardus-parvus patte
rn 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
waveform was noted. There was no correlation between the Doppler resul
t after PTA and the angiographic and clinical result. In contrast ther
e was a significant correlation between the Doppler result before PTA
and the clinical outcome: patients with a normal intrarenal spectral w
aveform before PTA showed no improvement in their arterial hypertensio
n. Conclusion: Our results indicate that a patient with a normal spect
ral waveform analysis does not response to PTA. However, there is stil
l an unpredictable clinical response even if a patient has an abnormal
intrarenal spectral waveform prior to PTA and a complete normalizatio
n after PTA.