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UNASSIGNED: In-situ right atrial (RA) thrombus is a rare occurrence typically associated with heightened inflammatory or hypercoagulable states. Here, we present a case of in-situ RA thrombus mimicking atrial myxoma in a patient with sepsis and bacteraemia.
UNASSIGNED: A 41-year-old man presented with septic arthritis and bacteraemia caused by methicillin-resistant Staphylococcus aureus (MRSA). A transoesophageal echocardiogram revealed a large pediculated mass resembling atrial myxoma, which was not visible on transthoracic echocardiography performed four days earlier. Cardiac magnetic resonance (CMR) imaging strongly suggested a thrombus, leading to the patient undergoing transcatheter aspiration. Subsequent pathology confirmed an organised fibrin thrombus without evidence of infection.
UNASSIGNED: The patient\'s in-situ RA thrombus likely developed in response to a heightened inflammatory state associated with sepsis. Limited data exist on in-situ RA thrombi in the absence of atrial fibrillation, though some reports suggest a correlation between heightened inflammation and a hypercoagulable state.
UNASSIGNED: CMR imaging is invaluable for characterising such masses and can aid in distinguishing a thrombus from a myxoma.
CONCLUSIONS: Differentiating right atrial (RA) thrombus from myxoma: cardiac magnetic resonance imaging is essential for distinguishing RA thrombus from myxoma, preventing unnecessary surgeries.Hypercoagulable and inflammatory states: spontaneous in-situ RA thrombi can occur without deep vein thrombosis (DVT) or atrial fibrillation, especially in hypercoagulable and inflammatory conditions.Transcatheter aspiration: this less invasive alternative to surgery is effective for large, mobile RA thrombi, reducing embolisation risk.

Patients with cancer are at risk for thrombotic complications due to a hypercoagulable state. However, the benefit of prophylactic anticoagulation is unclear in many subsets of these patients. For the first episode of acute thromboembolic disease (VTE) in patients with active cancer, anticoagulant therapy is administered for at least three to six months. Herein, we present a 31-year-old female with active, recurrent stage IIIa classical Hodgkin lymphoma (CHL) (nodular sclerosis), previously treated for proximal upper extremity deep vein thrombosis (DVT), presenting for evaluation of shortness of breath and eventually diagnosed with bilateral pulmonary embolism (PE) secondary to a right atrial thrombus. The patient was successfully treated with surgical resection of the thrombus. With this case report, we hope to encourage physicians to use prophylactic indefinite anticoagulation in patients with active cancer and previous DVT, including patients with upper extremity DVT.

We report the case of a 64-year-old adult male with a rapidly recurring metastatic lung carcinoma in the right atrium of the heart. Advanced-stage lung carcinomas can metastasize to other organs such as the heart, bones, brain, liver, adrenal glands, and lymphatic system, although actual rates of metastasis to the heart are relatively quite low. This patient was diagnosed with a right atrial mass that was determined through pathology to be a result of an existing non-small cell lung carcinoma. This mass, despite resection, reappeared two weeks later at the same location and with a similar size to the previous metastatic tumor. This case highlights the importance of closely monitoring sites of resected tumors for potential regrowth and complications.

BACKGROUND: Calcified right atrial thrombus is rare and commonly occurs secondary to atrial fibrillation and long-term central venous catheterization which present risk for embolization. Treatment typically involves anticoagulation and antiplatelet therapy but rarely surgical excision can be performed, especially in patients with venous obstruction or concomitant valvular dysfunction.
METHODS: We present the case of a 69 year old symptomatic female with a history of atrial fibrillation and long-term venous catheterization found to have a large calcified right atrial thrombus causing inferior vena cava obstruction and severe tricuspid regurgitation. Patient underwent full median sternotomy with ascending arterial cannulation with superior vena cava and femoral venous cannulation. Intraoperatively, extensive right atrial calcified thrombus was found extending into the inferior vena cava and involving the septal portion of the tricuspid valve annulus causing regurgitation. The calcified thrombus was removed which resolved the inferior vena cava obstruction and the tricuspid valve was repaired by transecting septal leaflet chordae, commissuroplasty, and ring annuloplasty. Postoperative course was uncomplicated and pathology confirmed a calcified right atrial thrombus. At 6 month follow up, the patient was asymptomatic with echocardiogram showing no inferior vena cava stenosis and trivial tricuspid regurgitation.
CONCLUSIONS: Surgical excision of calcified right atrial thrombus is rare and is often indicated for symptomatic patients with extensive involvement causing venous inflow obstruction or valvular dysfunction. Sufficient preoperative imaging and a multi-disciplinary approach are essential for accurate diagnosis to guide targeted treatment. When the tricuspid valve is involved, repair is preferred over replacement in this patient population given their propensity for calcification and thrombus formation which may result in an increased risk of early bioprosthetic valve degeneration or mechanical valve thrombosis.

A 58-year-old male underwent LVAD-Implantation after ECLS explantation. After removal of ECLS (A) transesophageal echocardiography revealed thrombus in the inferior vena cava (B) and right atrium (C). The thrombus was removed with a second pump run including RVAD-Implantation. (D) The diameter of thrombus formations was 6 × 1 cm and 5 × 1.5 cm.

Behcet syndrome is a systemic vasculitic syndrome. Vascular involvement in Behcet syndrome affects both arterial and venous vascular systems, contributing to significant morbidity and mortality. However, diagnosing vascular lesions can be challenging due to their resemblance to common vascular diseases, leading to potential misdiagnoses. This case report emphasizes the importance of recognizing atypical manifestations of this disease to ensure a prompt and accurate diagnosis. This case report describes a unique presentation of Behcet syndrome in a 23-year-old male patient who presented with per rectal bleeding, abdominal distension, right quadrant abdominal pain, pleuritic chest pain, and fever. The patient also reported a history of recurrent oral and genital ulcers, skin lesions, and a previous episode of dural venous sinus thrombosis. Extensive investigations revealed the involvement of the inferior vena cava and right hepatic vein, representing an atypical vascular manifestation of Behcet syndrome. Prompt diagnosis by a multidisciplinary team led to appropriate treatment with cyclophosphamide and steroids, resulting in the resolution of vascular thrombosis. In this particular case, the patient presented with involvement of the inferior vena cava and right hepatic vein, a rare and unusual manifestation of the disease. This case highlights the diverse nature of vascular complications in Behcet syndrome and underscores the importance of considering this diagnosis in patients with unexplained vascular abnormalities. Overall, this case report highlights the importance of considering Behcet syndrome in the differential diagnosis of patients with unexplained vascular manifestations. It also emphasizes the need for a comprehensive clinical evaluation and collaborative approach to ensure timely and effective management.

Coronavirus disease 2019 (COVID-19) is primarily a respiratory infection, but it undoubtedly results in systemic illness that affects multiple systems. The high incidence of thromboembolic events is one distinctive clinical characteristic of COVID-19. This case report is about a unique clinical presentation of a 40-year-old homeless female with polysubstance abuse, who was diagnosed with a right atrial thrombus, sub-massive pulmonary embolism, and COVID-19 infection. The patient presented with shortness of breath, subjective fevers, generalized swelling, and chest and upper abdominal pain. Initially, she was treated with tissue plasminogen activator (TPA) and heparin drip for her thrombi, and she was managed conservatively when hemoptysis ensued post-TPA. She was later sent to a higher level of care for surgical embolectomy. In most cases, severe pulmonary parenchymal disease secondary to COVID-19 correlates with the severity of thromboembolic complications, however, in our case report, there was a right atrial thrombus and pulmonary embolism in the absence of COVID pneumonia. This highlights how notorious COVID-19 infections can be.

Systemic lupus erythematosus (SLE) is a chronic autoimmune disorder manifesting in myriad of forms and could affect almost any body system or organ. Antiphospholipid syndrome (APLS) is a relatively common scenario in SLE. Both arterial and venous thrombosis is a hallmark feature of APLS. Among others, intracardiac thrombus is a rare and potentially life-threatening presentation. It could occur in any heart chamber whereas the right atrium is the least common location. The treatment is based on anticoagulation preferably with warfarin along with treatment of SLE. We describe a young patient with newly diagnosed SLE with APLS complicated by right atrial thrombus formation. We are, therefore, adding to the scant literature on right atrial thrombi in SLE and increasing awareness of readers of this serious and potentially deadly condition if left unrecognized.

Acute promyelocytic leukemia is a special type of acute myeloid leukemia. Patients with this disease are at high risk of complications. Right atrial thrombosis is a rare but potentially serious complication. A 55-month-old girl with acute promyelocytic leukemia M3 was in her last phase of treatment. Radiologic examination revealed an echo structure in the right atrium that was still present after 6 weeks of anticoagulation treatment with enoxaparin. Cardiac surgery was performed to remove the mass, which was found to be a calcified thrombus. Although this is a rare occurrence, recognition of the possibility of a calcified thrombus may minimize misdiagnosis and allow surgical retrieval if the thrombus is sufficiently large.