Resumo

RODRIGUEZ, Javier et al. Variability in fractal dimension of left coronary artery ramification during absence and presence of moderate and severe occlusive arterial disease. Rev. Col. Cardiol. [online]. 2007, vol.14, n.3, pp.173-180. ISSN 0120-5633.

The fractal theory allows the objective characterization of irregular objects. The left coronary artery ramification is an irregular object actually evaluated by means of arteriography, in which the occlusive arterial disease is evaluated through the comparison of measures between arterial segments, without evaluating the impact of the lesion in the whole coronary ramification. The irregularity of the whole coronary ramification can be evaluated through fractal dimensions. Consecutive images between systole and diastole of nine patients with moderate occlusive arterial disease were characterized in a fractal way and were confronted with the measures of seven patients with severe occlusive arterial disease and with seven without occlusive arterial disease by comparing the variability and the net difference. Patients with moderate lesion and without occlusive arterial disease have a mathematical behavior characterized by a greater variability, while patients with severe occlusive disease have net differences generally equal to 0.

Palavras-chave : occlusive arterial disease; fractal dimension; left coronary ramification; left coronary artery; angiography.

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