Pulmonary arteriovenous malformation (original) (raw)
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Pulmonary arteriovenous malformations: what the interventional radiologist needs to know
La radiologia medica, 2019
Pulmonary arteriovenous malformations (PAVMs) or fistulas are rare direct pathological connections between pulmonary arterial and venous circulation. Most of PAVMs are congenital and closely associated with hereditary hemorrhagic telangiectasia, but acquired PAVMs have also been described in the literature. Diagnosis of PAVMs is a priority for clinicians, in order to prevent potentially fatal events such as cerebrovascular stroke, systemic septic embolization, hemoptysis and hemothorax. In this scenario, the radiologist plays a key role in both diagnostic and therapeutic workups of PAVMs: Chest X-ray, computed tomography and magnetic resonance are effective tools for PAVMs identification and confirmation of the suspected diagnosis. Furthermore, imaging modalities provide most of the elements for PAVMs classification according to their angioarchitecture (simple and complex) and help the clinicians in establishing which lesion requires prompt treatment and which one will benefit of imaging follow-up alone. Endovascular management of PAVMs has grown up as the first-line treatment in respect of surgery during last decades, showing lower risk of intra-and post-procedural complications and offering a wide number of treatment options and materials, ensuring effective management in virtually any clinical situation; interventional treatment aims to exclude PAVMs from pulmonary circulation, and specific technique and embolic agents should be selected according to pre-treatment imaging, in order to obtain the best procedural outcome. This paper proposes a review of the clinical and radiological features that a radiologist needs to know for PAVMs diagnosis and proper management, also showing an overview of the most common endovascular treatment strategies and embolization materials.
Journal of Clinical Medicine
Pulmonary arteriovenous malformations (PAVMs) are uncommon, predominantly congenital direct fistulous connections between the pulmonary arteries and pulmonary veins, resulting in a right to left shunt. Patients with PAVMs are usually asymptomatic with lesions detected incidentally when radiological imaging is performed for other indications. In this review, we discuss the classification and radiological features of PAVMs as well as their treatment and follow-up options, with a particular focus on percutaneous endovascular techniques and the evolution of the available equipment for treatment.
Pulmonary Arteriovenous Malformations in a 18-months-old Child: A Case Report
JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH
Pulmonary Arteriovenous Malformation (PAVM) is a cardiovascular anomaly in which an anatomic communication between the pulmonary artery and pulmonary vein is formed, resulting in an additional cardiac shunt from the right to left side. PAVM is a rare disease, reported more in females, but in newborns comparatively higher in males. Cases can vary from asymptomatic to symptomatic such as having dyspnoea, hypoxia, cyanosis, neurological symptoms. They are mostly congenital having association with Hereditary Haemorrhagic Telangiectasia (HHT). Herby, author present a case of 18-months-old female was admitted with peripheral cyanosis in the Paediatric Department. Her saturation was 76%, after admission she received three doses of salbutamol nebulisation and was kept on 3 litre oxygen until her saturation increased to around 90%. On auscultation, a murmur of grade 2/6 heard in the left axilla with clear lung fields. Chest X-ray detected a prominent lobulated opacity in the left sided lung ...
Pulmonary Arteriovenous Fistula: Presentation, Diagnosis, and Treatment
World Journal of Surgery, 1999
Pulmonary arteriovenous fistulas (PAVFs) are rare vascular malformations of the lung. There is a strong association with Rendu-Osler-Weber disease. Although most patients are asymptomatic, PAVFs can cause dyspnea from a right-to-left shunt. They can also bleed and result in hemoptysis and hemothorax. Because of paradoxical emboli, various central nervous system complications have been described including stroke, and brain abscess. Currently, spiral computed tomography offers the most practical method for establishing the presence of PAVFs. Most patients should be treated. Therapeutic options include angiographic embolization with metal coils or balloon occlusion and surgical excision. Angiographic treatment has become the mainstay of therapy for most patients during the last decade. It is less invasive and can be repeated easily. Surgery, which usually consists of a conservative lung resection, is associated with low morbidity and a low recurrence rate. Both therapeutic approaches are discussed. The Mayo Clinic surgical experience of the last 20 years for PAVFs is presented.
Revision of facts on pulmonary arteriovenous malformations – experience with embolization techniques
2017
Introduction. Pulmonary arteriovenous malformations are pathological direct connections between arterial and venous circulation, bypassing capillary networks. The consequences of the occurring right-to-left shunt comprise systemic hypoxemia and loss of pulmonary vascular filtration properties, which pose a risk of serious life-threatening neurologic complications because of paradoxical embolism. 60-90% of PAVMs appear to be a manifestation of the underlying Hemorrhagic Hereditary Telangiectasia. Treatment is introduced as protective measures against life-threatening hemorrhagic or neurologic symptoms, and presently transcatheter embolization proved to be a method of choice. Aim. The aim of this study was to discuss the efficacy and technical details of the selected current approaches to PAVM treatment with respect to the angioarchitecture of the fistulae, based on the literature review and clinical experience. Material and methods. We performed a retrospective investigation of 5 pat...
Journal of International Medical Research, 2005
Pulmonary arteriovenous malformations (PAVMs) are rare anomalies. The degree of right-to-left shunting, which can lead to cyanosis and paradoxical embolism causing neurological complications, determines the prognosis. We report two cases of PAVM and review the literature. A 45-year-old woman with clinical signs and symptoms of PAVM was examined using several different scanning techniques, which showed a large PAVM in the lower lobe of her right lung. A lobectomy was performed, which revealed a 5 cm diameter PAVM with one feeding artery and multiple veins. Intravenous angiography of a 7-year-old girl with symptoms of fatigue and acro-cyanosis confirmed the presence of a large PAVM in her right lower lobe. The PAVM had two major arteries arising from the aorta, which were ligated during a lobectomy. Both patients recovered well following surgery. Although PAVMs are rare, their neurological and haemodynamic consequences may be fatal. Interventional treatment techniques, including surge...