Pulmonary arteriovenous malformations: diagnosis

Area of Science:

• Vascular Medicine
• Radiology
• Interventional Cardiology

Background:

• Pulmonary arteriovenous malformations (PAVMs) are rare, abnormal vascular connections between pulmonary arteries and veins.
• They bypass the pulmonary capillary bed, causing intrapulmonary right-to-left shunts and potential complications like hypoxemia and stroke.
• PAVMs are often associated with hereditary hemorrhagic telangiectasia (HHT) but can also arise from secondary conditions.

Purpose of the Study:

• To provide a comprehensive overview of pulmonary arteriovenous malformations (PAVMs).
• To discuss the spectrum of PAVMs, their complications, diagnostic modalities, and treatment strategies.
• To emphasize the importance of long-term follow-up after treatment.

Main Methods:

• Review of existing literature and clinical guidelines on PAVMs.
• Discussion of diagnostic imaging techniques, including transthoracic contrast echocardiography (TTCE) and computed tomography (CT).
• Description of endovascular occlusion as the primary treatment modality.

Main Results:

• PAVMs range from microscopic lesions to large aneurysmal connections.
• Complications include stroke, brain abscess, hypoxemia, hemoptysis, and hemothorax.
• CT is the gold standard for diagnosis, and endovascular occlusion is the preferred treatment.

Conclusions:

• PAVMs are significant vascular anomalies requiring accurate diagnosis and timely intervention.
• Endovascular occlusion is effective but necessitates ongoing monitoring for recurrence or enlargement.
• Long-term clinical and imaging follow-up is crucial to manage PAVMs effectively.