Lee, Bok Y.; Castillo, Horace T.; Madden, John L.
October 1970
Angiology;Oct1970, Vol. 21 Issue 9, p595
Academic Journal
Pattern recognition theory provides a conceptual basis for the quantification of blood flow waveforms. Thirteen descriptors of a single waveform related to one cardiac cycle have been identified. When these descriptors are measured, numerical data can be obtained that may be analyzed mathematically. The analysis will permit identification of statistical signatures for normal and pathological waveforms of blood flow in peripheral vascular disease. Using the quantification method of pulsatile waveforms analysis can reveal whether there is any occlusive arteriosclerotic involvement of the distal arterial tree or if the supposedly well constructed by-pass graft may become thrombosed postoperatively. Preliminary studies of those measurements seem to provide indications of the success or failure of the surgical procedure. The lumbar sympathectomy produced an increase in the effective blood volume and positive volume flow in 93% of the cases studied and also, a mean flow increase in 88% of the cases. The abolishment of the reverse flow, with its baseline shift and peak amplitude increase after lumbar sympathetic ganglionectomy, increase the effective blood volume flow per cardiac cycle. We recommended, therefore, that this method together with the immediate documentation of mean blood flow increase (or conversely, no increase) be used for assessment of the distal arterial system or for evaluation of the operative procedure, or for both.


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