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USE OF FIRST‐PASS NUCLEAR ANGIOCARDIOGRAPHY TO DETECT LEFT‐TO‐RIGHT CARDIAC SHUNTS IN THE HORSE
Author(s) -
KOBLIK PHILIP D.,
HORNOF WILLIAM J.
Publication year - 1987
Publication title -
veterinary radiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.541
H-Index - 60
eISSN - 1740-8261
pISSN - 0196-3627
DOI - 10.1111/j.1740-8261.1987.tb00048.x
Subject(s) - angiocardiography , medicine , shunt (medical) , nuclear medicine , horse , cardiology , blood flow , biology , paleontology
First‐pass nuclear angiocardiography was performed on 13 normal horses and 5 horses with confirmed left‐to‐right ventricular septal defects. Two methods of analyzing the ensuing pulmonary time‐activity histograms for shunt recirculation through the lungs were evaluated: (1) pulmonary‐to‐systemic blood flow ratio (QP:QS), based on gamma variate modeling of the lung histogram, and (2) a simple count‐ratio method (C2:C1). Normal values were QP:QS=1.17±0.04 and C2:C1=0.40±0.07. Values for the five horses with left‐to‐right shunts were QP:QS=2.94±0.13 and C2:C1=0.76±0.11. Both parameters showed significant differences (unpaired t ‐test; p <0.005) between the two groups, although separation was better with QP:QS.