Why the study?
Thrombotic events are common after cardiac arrest, but the rapid formation of intracardiac thrombi is rarely directly observed.
This case demonstrates that intracardiac thrombotic masses can form rapidly due to blood stasis during cardiac arrest and may resolve quickly after return of spontaneous circulation, highlighting the need for prompt echocardiographic evaluation post-resuscitation.
May indicate transient right atrial masses on TEE during arrest; hypothesis-generating and should not yet change practice.
Although thrombotic events are common complications after cardiac arrest, the rapid formation of intracardiac thrombi is rarely directly observed. Here, we report a 57-year-old male who underwent laparoscopic bladder flap ureteral replacement surgery for a right ureteral fistula. During the surgery, indocyanine green was injected into the ureter, resulting in sudden respiratory and cardiac arrest. Immediate cardiopulmonary resuscitation was initiated, and transesophageal echocardiography revealed right atrial mass formation. After cardiopulmonary resuscitation, the patient's vital signs remained stabilized. Repeat cardiac ultrasound demonstrated rapid mass resolution. The patient was successfully extubated in the intensive care unit and was subsequently discharged without complications. This case directly documents the rapid formation of intracardiac mass following cardiac arrest, highlighting the need to promptly rule out thrombotic events after successful resuscitation to enable timely management.
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Chen et al. (2026) studied this question.
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