en Cardiology Cardiology case report case report <span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:14.5pt"><b><i><span style="color:blue">Background:</span></i></b> 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. </span><br> <span style="line-height:14.5pt"><b><i><span style="color:blue">Case Presentation:</span></i></b> 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. </span><br> <span style="line-height:14.5pt"><b><i><span style="color:blue">Conclusion:</span></i></b><b> </b>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.<b><i> </i></b></span></span></span><br> &nbsp; Chiari network, acute pulmonary thromboembolism, Doppler echocardiography, right atrial net. 807 812 http://caspjim.com/browse.php?a_code=A-10-1189-3&slc_lang=en&sid=1 Petar Avramovski avramovski@gmail.com 100319475328460054735 100319475328460054735 Yes Clinical Hospital - Bitola, Department of Internal Medicine, Bitola, North Macedonia Zaklina Servini zaklinaservini@yahoo.com 100319475328460054736 0009-0009-6341-4335 No Clinical Hospital - Bitola, Department of Internal Medicine, Bitola, North Macedonia Maja Avramovska dr.avramovska@gmail.com 100319475328460054737 100319475328460054737 No Clinical Hospital - Bitola, Department of Internal Medicine, Bitola, North Macedonia Kosta Sotiroski kostasotiroski@gmail.com 100319475328460054738 100319475328460054738 No Faculty of Economics – Prilep, Department of Statistics, University “St. Kliment Ohridski” Bitola, North Macedonia Aleksandra Arandjelovic pom_cool@yahoo.com 100319475328460054739 0009-0006-4684-3312 No Clinical Hospital Zvezdara, Department of Interventional Cardiology, University of Belgrade, Serbia Aleksandra Servini alexandraservini@gmail.com 100319475328460054740 0009-0002-6519-4179 No University Surgery Hospital Sv. Naum Ohridski, Department of Vascular Surgery, Skopje, North Macedonia Vesna Siklovska vesnaspasova@yahoo.co.uk 100319475328460054741 100319475328460054741 No Clinical Hospital - Bitola, Department of Internal Medicine, Bitola, North Macedonia Stefan Talev stefantalev@hotmail.com 100319475328460054742 100319475328460054742 No Clinical Hospital - Bitola, Department of Internal Medicine, Bitola, North Macedonia Irena Trajcevska dr_irena@hotmail.com 100319475328460054743 0009-0005-7625-7990 No Clinical Hospital - Bitola, Department of Internal Medicine, Bitola, North Macedonia