In echocardiography, how can a thrombus be differentiated from a mass?

In echocardiography, distinguishing a thrombus from a mass is primarily based on characteristic features that involve mobility, echogenicity, and morphology. A thrombus typically exhibits distinct characteristics that can help in its identification.

A key feature of a thrombus is its lack of mobility. Thrombi often adhere to the heart's walls or valves and do not change location with heart contractions. This immobility is a critical differentiator, as most masses, such as tumors, may be more mobile or can shift slightly with motion.

Additionally, thrombi are usually more echogenic compared to other types of masses. This means they reflect more ultrasound waves, making them appear brighter on an echocardiogram. The higher echogenicity is due to the dense, fibrin-rich structure of a thrombus, which can help in its identification.

In contrast, masses like tumors can exhibit different echogenicity and may show mobility where thrombi would not. Other criteria, such as size and shape, and patient symptoms are not as definitive for differentiating these entities, as both thrombi and masses can vary widely in these aspects.

Therefore, the combination of lack of mobility and higher echogenicity makes it possible to accurately differentiate a thrombus from a