Young Adult Patients With Short Dissection Length and Thrombosed False Lumen Without Ulcer-Like Projections are Liable to Have False-Negative Results of D-Dimer Testing for Acute Aortic Dissection Based on a Study of 113 Cases

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Background Previous reports indicate that D-dimer testing (DT) for acute aortic dissection (AAD) has a sensitivity of 100%, but each study comprised less than 30 patients. The aim of this study was to evaluate the positive rate and factors related to the results of DT for AAD in a larger population. Methods and Results DT (cutoff; upper normal limit) was performed for 113 consecutive AAD patients within 24h of symptom onset. In total, 104 (92%) patients exhibited positive DT. The positive rate of DT showed a low tendency in patients aged less than 70 years and for a time interval from symptom onset to admission within 120 min, and there were significant differences between those with and without a thrombosed false lumen (TFL) (86.4% (n=59) vs 98.1% (n=54), p=0.033), complete TFL (excluding patients with ulcer-like projection (ULP) from those with a TFL) (81.1% (n=37) vs 97.4% (n=76), p=0.005) and length score (1 (n=28); 78.6%, 2 (n=40); 95.0%, 3 (n=45); 97.8%, p=0.005). Multivariate analysis demonstrated age (odds ratio=1.164, p=0.013), complete TFL (0.048, 0.030) and length score (6.271, 0.033) as independent factors. Conclusions Physicians should be aware that younger patients with short dissection length and a TFL without ULP are liable to have false-negative DT results.
2006-11-20