Arteriovenous malformations (AVMs) of the brain represent one of the most complex and fascinating pathologies within the field of vascular neurosurgery. They are congenital anomalies consisting of a direct and anomalous connection between arteries and veins, without the interposition of a normal capillary bed. This structure, called the «nidus,» subjects the cerebral veins to elevated arterial pressures for which they are not designed, which carries a significant risk of rupture and intracranial hemorrhage. At the Arráez Institute, we address this challenge through a multidisciplinary strategy that combines clinical experience with the most advanced technology.
Although AVMs may remain asymptomatic for years, they are usually detected following an episode of cerebral hemorrhage, seizures, or chronic headaches. The risk of bleeding is estimated at 2–4% per year, and each hemorrhagic episode is associated with significant morbidity and mortality. Therefore, the management of these lesions requires a thorough evaluation to determine the risk-benefit balance of any intervention.
Imaging diagnosis of arteriovenous malformations
Accurate diagnosis is the first critical step in managing an AVM. The architecture of these lesions is unique to each patient, necessitating the use of high-resolution imaging techniques to map the nidus, identify feeding arteries, and understand the venous drainage pattern.
The Importance of Digital Angiography
At Arráez Institute, Digital Subtraction Cerebral Angiography remains the fundamental test. This procedure allows us to visualize blood flow dynamics in real-time, identifying weak points such as aneurysms associated with feeding arteries or stenosis in draining veins, factors that increase the risk of rupture. We complement this information with functional Magnetic Resonance Imaging (fMRI) and Tractography to evaluate the relationship of the AVM with eloquent areas of the brain responsible for language, movement, or vision.
Risk classification and stratification
We use standardized grading systems, such as the Spetzler-Martin scale, to categorize AVM complexity based on its size, location in critical areas, and drainage pattern. This stratification is essential for deciding whether treatment should be conservative, surgical, or a combination of various modalities.
The multidisciplinary team of Arráez Institute for the management of AVMs
Given the complexity of these injuries, treatment rarely relies on a single technique. At our center in Málaga, success lies in close collaboration between vascular neurosurgeons, interventional neuroradiologists, and radiosurgery specialists.
A Three-Pronged Approach
Modern treatment of AVMs is usually multimodal. Endovascular embolization is frequently used as a preliminary step before surgery or radiosurgery. Via microcatheters, liquid embolic agents (such as Onyx) are introduced to reduce blood flow within the nidus, facilitating safer surgical resection or improving radiation efficacy.
Microsurgery remains the definitive treatment for many AVMs. Under microscopic vision and with the support of intraoperative neurophysiological monitoring, Dr. Arráez and his team proceed with the meticulous exclusion of the feeding arteries and complete resection of the nidus, always preserving normal venous circulation in the brain.
For AVMs located in surgically high-risk or small areas, radiosurgery CyberKnife It offers a non-invasive alternative. Radiation induces a biological response that causes the abnormal vessels to progressively close over several months or years.
Commitment to Patient Safety
In the Arraez Institute, Each case is discussed in a vascular committee to design the safest and most effective therapeutic plan. Our goal is not only to eliminate the AVM but also to protect the patient's functional integrity. The combination of techniques allows us to treat lesions that just a few years ago were considered inoperable, offering a new health outlook to our patients.
Conclusion: strive for excellence in vascular neurosurgery
The management of cerebral arteriovenous malformations is a testament to the advances in modern medicine. The integration of microsurgery, endovascular interventionism, and robotic radiosurgery allows these lesions to be addressed with unprecedented precision and safety.
If you have been diagnosed with an AVM or present symptoms suggestive of a cerebrovascular pathology, it is essential that you seek the care of a team with extensive experience and technological resources. At the Arráez Institute, we are prepared to offer you the most advanced and personalized treatment in Malaga.
The treatment of AVMs requires high specialization. Trust the experience of the Arráez Institute in Málaga.