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Renal artery stenosis: changes in intrarenal Doppler waveform following percutaneous transluminal angioplasty
M Stuhrmann1, T Jahnke, C Roefke
1Radiologische Klinik, Klinikum Barmen, Universität Witten-Herdecke, Wuppertal, Germany.
Purpose:
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.
Conclusion:
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.