[Right atrial thrombosis--a difficult diagnostic and therapeutic problem]

Area of Science:

• Cardiology
• Vascular Medicine
• Diagnostic Imaging

Background:

• Two-dimensional echocardiography has increased the diagnosis of right atrial thrombi.
• Right heart thrombi can originate from peripheral veins (Type A) or develop within the heart chambers (Type B).

Purpose of the Study:

• To present current understanding of the etiology of right heart thrombi.
• To discuss the clinical significance and prognosis of different thrombus types.
• To outline treatment guidelines for right atrial thrombi.

Main Methods:

• Review of current literature and clinical opinions on right heart thrombi.
• Classification of thrombi based on origin and characteristics (Type A vs. Type B).
• Analysis of clinical significance, prognosis, and treatment strategies.

Main Results:

• Type A thrombi are mobile, worm-shaped, originating from deep peripheral veins, associated with high risk of severe pulmonary embolism and mortality.
• Type B thrombi are parietal, immobile, developing within right heart chambers, generally benign with lower mortality.
• Aggressive therapy (surgery or fibrinolysis) is recommended for Type A thrombi, while anticoagulation is often sufficient for Type B.

Conclusions:

• Distinguishing between Type A and Type B right atrial thrombi is crucial for determining prognosis and guiding treatment.
• Prompt and aggressive management is essential for high-risk Type A thrombi to reduce mortality from pulmonary embolism.
• Type B thrombi typically have a favorable prognosis and can be managed conservatively with anticoagulation.