Unveiling the Chiari Network: A Case Report of Misdiagnosis Mimicking Pulmonary Embolism and Right Atrium Thrombus

Background: The Chiari network consists of movable, mesh-like structures occasionally observed in the right atrium proximate to the openings of the inferior vena cava and coronary sinus. Case Presentation: This case discusses a 75-year-old male initially suspected to have acute pulmonary thromboembolism, but we misdiagnosed the Chiari network as a thrombus in the right atrium. Subsequent echocardiography revealed a Chiari network in the right atrium. Accurate identification using transthoracic echocardiography, Doppler echocardiography, is crucial. Conclusion: Accurate identification of the Chiari network is essential for optimal patient care. Thorough evaluation is crucial in cases suggestive of acute pulmonary thromboembolism or right atrium thrombus.