Borges RR, Morato TN, Bezerra ASDA, Dias BA, Reinaux JCDF, Monte GU, Farage L. Avaliação de diferentes tempos de trânsito do meio de contraste intravascular em exames de tomografia computadorizada coronariana.
Radiol Bras 2022;
55:161-166. [PMID:
35795606 PMCID:
PMC9254703 DOI:
10.1590/0100-3984.2021.0063]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/08/2021] [Indexed: 11/22/2022] Open
Abstract
Objective
To measure the transit times (TTs) of contrast agents among the injection
site (antecubital vein), superior vena cava, pulmonary trunk, and ascending
aorta, in coronary computed tomography angiography (CTA) examinations of
outpatients with no history of cardiovascular or lung disease, thus defining
reference values for those TTs.
Materials and Methods
The contrast TTs from the injection site (antecubital vein) to the superior
vena cava, from the superior vena cava to the pulmonary trunk, and from the
pulmonary trunk to the ascending aorta were measured by monitoring contrast
enhancement in real time (bolus tracking). Cardiac output was measured by
the geometric method during the CTA examination and was correlated with the
contrast TT.
Results
Forty-three individuals were analyzed. The mean contrast TT was 13.1 s
overall (from the antecubital vein to the ascending aorta), 3.0 s from the
superior vena cava to the pulmonary trunk, and 7.2 s from the pulmonary
trunk to the ascending aorta. There was a tendency toward a correlation
between contrast TT and cardiac output (p = 0.055).
Conclusion
The reference values established here for contrast TTs among the superior
vena cava, pulmonary trunk, and ascending aorta will serve as a basis for
clinical evaluation.
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