[Comparison between Doppler CW and Duplex-Scanning in the assessment of silent peripheral vascular lesions in a population of ischemic heart disease patients].
A recent ultrasound technique, Duplex Scanning (D-S), endowed with significant sensitivity, specificity and accuracy has been used to screen atherosclerotic disease in subjects at risk. Within the context of a transverse investigation aimed at identifying the multi-district nature of atherosclerotic plaques, the sensitivity and specificity values and the concordance index of Doppler C.W. (D-CW) have been checked using the D-S in carotid districts as a reference test in 205 patients suffering from ischaemic cardiopathy, asymptomatic for carotid vasculopathy, aged between 45 and 55. 170 patients had the D-CW and the D-S in 340 carotid vessels. D-CW revealed atherosclerotic changes in 122 carotids (prevalence 36%) while the D-S in 119 districts (prevalence 35%) revealed plaques greater than simple thickening, of which 89 (26%) with stenosis less than 30% and 30 (9%) with stenosis greater than 30%. Of the latter, 25 were greater than 60% and 5 less than 60%: one of them provoked a stenosis greater than 75%, the limit beyond which the change becomes haemodynamically significant. D-CW showed 46% sensitivity, a specificity of 70% and a concordance percentage of 59% with respect to D-S. D-CW sensitivity proved apparently low as did the concordance percentage between C-CW and D-S. However, considering that the lesions encountered were prevalently all haemodynamically non-significant, these values may become acceptable.(ABSTRACT TRUNCATED AT 250 WORDS)
Caruzzo
C
C
Liboni
W
W
Sechi
A
A
Bonzano
A
A
Bobbio
M
M
Scrocca
I
I
Marengo
C
C
Caruzzo
E
E
D003324:Coronary Artery Disease / Q000175:diagnosis*; D004452:Echocardiography / Q000379:methods*; D015150:Echocardiography, Doppler / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged
Confronto tra Doppler CW e Duplex-Scanning nella valutazione delle lesioni vascolari periferiche silenti in una popolazione con cardiopatia ischemica.