[Right atrial thrombosis and pulmonary embolism: role of echocardiography].

: The echocardiographic detection of a right thromboembolus, although rare, should be considered as a cardiological emergency that could lead to death for massive pulmonary embolism. The case of a 70 year-old man admitted to our Institution with the suspicion of pulmonary embolism is described. The echocardiogram performed showed a large mobile thrombus in the right atrium prolapsing through the tricuspid valve during diastole. After thrombolytic therapy with r-TPA, the patient faced a progressive hemodynamic deterioration and died of electromechanical dissociation.