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(Stroke. 2003;34:2664.)
© 2003 American Heart Association, Inc.

Original Contributions

Effect of Age on Clinical and Morphological Characteristics in Patients With Brain Arteriovenous Malformation

C. Stapf, MD; A.V. Khaw, MD; R.R. Sciacca, EngScD; C. Hofmeister, PhD; H.C. Schumacher, MD; J. Pile-Spellman, MD; H. Mast, MD; J.P. Mohr, MD A. Hartmann, MD

From the Stroke Center, Neurological Institute (C.S., A.V.K., C.H., H.M., J.P.M.), Interventional Neuroradiology (H.C.S., J.P.-S.), and Medicine (R.R.S.), Columbia University College of Physicians and Surgeons, New York, NY; Department of Neurology, Universitätsklinikum Benjamin Franklin, Freie Universität Berlin, Berlin, Germany (C.S., A.H.); and Department of Neurology, Hôpital Lariboisière, Paris, France (C.S.).

Correspondence to C. Stapf, MD, Stroke Center/Neurological Institute, Columbia University College of Physicians and Surgeons, 710 W 168th St, New York, NY 10032. E-mail cstapf{at}neuro.columbia.edu

Background and Purpose— The goal of this work was to determine the effect of age at initial presentation on clinical and morphological characteristics in patients with brain arteriovenous malformation (AVM).

Methods— The 542 consecutive patients from the prospective Columbia AVM database (mean±SD age, 34±15 years) were analyzed. Univariate statistical models were used to test the effect of age at initial presentation on clinical (AVM hemorrhage, seizures, headaches, neurological deficit, other/asymptomatic) and morphological (AVM size, venous drainage pattern, AVM brain location, concurrent arterial aneurysms) characteristics.

Results— Hemorrhage was the presenting symptom in 46% (n=247); 29% (n=155) presented with seizures, 13% (n=71) with headaches, 7% (n=36) with a neurological deficit, and 6% (n=33) without AVM-related symptoms. Increasing age correlated positively with intracranial hemorrhage (P=0.001), focal neurological deficits (P=0.007), infratentorial AVMs (P<0.001), and concurrent arterial aneurysms (P<0.001); an inverse correlation was found with seizures (P<0.001), AVM size (P=0.001), and lobar (P<0.001), deep (P=0.008), and borderzone (P=0.014) location. No age differences were found for sex, headache, asymptomatic presentation, and venous drainage pattern.

Conclusions— Our data suggest a significant interaction of patient age and clinical and morphological AVM features and argue against uniform AVM characteristics across different age classes at initial presentation. In particular, AVM patients diagnosed at a higher age show a higher fraction of AVM hemorrhage and are more likely to harbor additional risk factors such as concurrent arterial aneurysms and small AVM diameter. Longitudinal population-based AVM data are necessary to confirm these findings.

Key Words: aneurysm • cerebral arteriovenous malformations • intracranial hemorrhages • seizures • stroke

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