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Intrarenal color Doppler ultrasound for exclusion of renal artery stenosis in cases of multiple renal arteries. Analysis of the Doppler spectrum and tardus parvus phenomenon

Intrarenal color Doppler ultrasound for exclusion of renal artery stenosis in cases of multiple renal arteries. Analysis of the Doppler spectrum and tardus parvus phenomenon

Ultraschall in der Medizin 16(4): 172-179

To diagnose possible renal artery stenosis especially in case of multiple renal arteries by intrarenal colour-coded Duplex sonography. In 50 hypertensive patients lobar and interlobar arteries were looked for at 3 different levels. Analysis included the determination of the early systolic acceleration time and the assessment of the Doppler waveform, especially the "tardus-parvus" phenomenon. Intraarterial angiography was performed in all patients the next day. In 48/50 patients the sonographic investigations were sufficiently evaluable. Angiography showed haemodynamically relevant stenosis in 13 patients, in 4 patients bilaterally. In 21 patients (42%) multiple renal arteries were found. Sensitivity and specificity in the diagnosis of renal artery stenosis was 77% respectively 46% (threshold value > or = 0.120 s). In 10/17 angiographically verified haemodynamically relevant renal artery stenosis a change of the Doppler waveform was noted; sensitivity in the diagnosis of renal artery stenosis was 69%, specificity 90%. Intrarenal colour-coded Duplex sonography cannot be recommended as a screening tool for renal artery stenosis.

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Accession: 043455964

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PMID: 7569858

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