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CURRENT ISSUETHE JOURNAL OF CARDIOVASCULAR SURGERY

A Journal on Cardiac, Vascular and Thoracic Surgery


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The Journal of Cardiovascular Surgery 1998 February;39(1):9-13

VASCULAR PAPERS 

 ORIGINAL ARTICLES

Growth ­curve of rup­tured aor­tic aneu­rysm

Hirose Y., Takamiya M.

From ­the Department of Radiology, National Cardiovascular Center, Osaka, Japan

Objective. We hypoth­e­sized ­that ­the aor­tic aneu­rysm ­might ­grow biex­po­nen­tial­ly. The ­object of ­this ­study ­was to deter­mine ­the biex­po­nen­tial ­growth ­curve of aor­tic aneu­rysm.
Design. A fif­teen-­year ret­ro­spec­tive ­review of CT imag­es of aor­tic aneu­rysm.
Setting. Major car­di­o­vas­cu­lar refer­ral cen­ter.
Patients. Patients ­with ­true aor­tic aneu­rysm ­who ­were fol­lowed up ­with CT ­and per­formed CT at ­their aneu­rys­mal rup­tures.
Measures. The larg­est ­short-­axial diam­e­ters of ­the out­er con­tour of ­the aneu­rysms ­were meas­ured. Aortic aneu­rys­mal diam­e­ters ­were nor­mal­ized by ­those at rup­tures, ­and ­the ­plots ­were fit­ted to ­the biex­po­nen­tial ­curve.
Results. Eight ­patients ­out of 1481 ­had ­been fol­lowed up ­with CT ­scans. In regres­sion anal­y­sis, ­the val­ues ­fit ­well to ­the biex­po­nen­tial equa­tion: d(t) = 0.8345 ­exp (0.0052 t) + 0.1653 ­exp (0.8275 t), r = 0.934 ­where d(t) is ­the nor­mal­ized diam­e­ter, ­and t is ­months ­before rup­ture. The ­first ­part of ­the equa­tion main­ly express­es ­the ­slow ­growth, ­and ­the sec­ond express­es ­the rap­id ­growth short­ly ­before rup­ture.
Conclusions. Aortic aneu­rysm ­began to ­grow fast­er at ­about ­three ­months ­before rup­ture. It is impor­tant to ­find ­out ­the ­point ­that ­the ­growth of aor­tic aneu­rysm chang­es ­its ­rate fast­er ­than ­before, ­and ­once ­the ­point is ­observed, elec­tive ­repair ­should be con­sid­ered.

language: English


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