Infected left atrial myxoma

Myxoma is the most common primary tumor of the heart. It is uncommon for these tumors to become infected and, at times, clinical presentation is no different from that of an uninfected myxoma. We describe the case of a 58-year-old woman with a previous pharyngeal infection that developed into infection of a left atrial myxoma and which was complicated by systemic embolism affecting the lower limbs. Streptococcus oralis was identified in blood cultures and embolic material. The tumor was resected and the patient's subsequent clinical evolution was uneventful. The incidence of infected myxoma is very low. A review of the literature based on individual case reports is presented.     

Infected left atrial myxoma

A 47-year-old Japanese woman with a continuing high fever was promptly diagnosed as having infected atrial myxoma one day after admission based on transthoracic echocardiographic findings and positivity for bacteria in blood culture. The mass was removed by an urgent open heart surgery. Histopathological examination confirmed that this mass was a myxoma with gram-positive bacterial colonies. Generally, antemortem diagnosis is difficult and there is a high mortality of patients with infected myxoma; however, this patient completely recovered from the illness because of the prompt diagnosis. This is the 37th case of definite infected myxoma reported in the literature. The cause of infection of this patient might have been the acupuncture therapy she underwent for weight reduction.     

Extensive left atrial endoatriectomy for infective endocarditis

The technique of extensive endoatriectomy of the left atrium and reconstruction with autologous pericardium for infective endocarditis is described. Endocardium of the left atrium with vegetations was completely excised from the valvular annulus to normal endocardium, and autologous pericardium was used to reinforce the endocardial defect and to allow less tension in the closure. This technique permits complete removal of infectious lesions and facilitates mitral valve replacement reinforcing the mitral annulus.     

Primary cardiac liposarcoma simulating a left atrial myxoma

This paper reports the case of cardiac tumor which had been diagnosed as a left atrial myxoma but which later on was identified as being a primary cardiac liposarcoma. The clinical characteristics of cardiac liposarcomas, the problems of differential diagnosis, the prognosis and therapy are reviewed.     

Bacterial endocarditis as an unusual presentation of left atrial myxoma

A 72-year-old woman presented with chronic febrile illness and enterococcal bacteraemia, and after a series of exhaustive tests, was shown to have a left atrial mass on transoesophageal echocardiography. Successful resection of the atrial myxoma resulted in full recovery and discharge from hospital. The clinical features and investigative approach are discussed in relation to a review of the literature.     

The transesophageal echocardiographic diagnosis of left atrial myxoma simulating a left atrial thrombus in the setting of mitral stenosis.

We report a case of left atrial myxoma simulating a thrombus on transthoracic echocardiography, but correctly diagnosed using transesophageal echocardiography. As this tumor is usually fatal unless surgically resected, a correct diagnosis is essential. Myxomas which do not prolapse between the mitral valve leaflets and coexist with mitral stenosis may be difficult to diagnose accurately using transthoracic echocardiography. The advantages of transesophageal compared with transthoracic echocardiography in the diagnosis of nonclassical left atrial myxoma are discussed.     

心脏瓣膜黏液瘤合并感染性心内膜炎一例

1 病例资料 患者女性,55岁,以"发热半年,胸闷1周"于2018年12月14日入院.患者半年前无明显诱因出现发热,体温波动在37℃～39. 0℃,伴畏寒、头痛、四肢酸痛,无寒战、大汗,无咳嗽、咳痰、呼吸困难,无胸闷、胸痛、意识丧失等症状,于当地诊所考虑为"上呼吸道感染",反复输液治疗(具体用药不详),仍反复间断性发热...     

Secondary carcinoma of left atrium simulating myxoma.

Three cases are presented in which secondary carcinoma in the left atrium mimicked atrial myxoma or infective endocarditis. Constitutional features of weight loss, fever, anaemia, leucocytosis, raised erythrocyte sedimentation rate, and systemic emboli were prominent clinical features. The association of these systemic manifestations with both secondary deposits in the atrium and atrial myxomata may be the result of an immune response to circulating tumour antigens. Mitral stenosis was present in two of the three patients suggesting that left atrial thrombus may provide a site for the seeding of malignant cells.     

Calcified left atrial myxoma with floppy mitral valve.

A heavily calcified left atrial myxoma in a man aged 53 was diagnosed from the plain chest x-ray film and confirmed by echocardiography. There was also moderate mitral regurgitation caused by a floppy mitral valve. Before a systemic embolus is considered to have arisen from a floppy mitral valve, echocardiography must be performed.     

Endocarditis on a left atrial myxoma.

A 55-year-old woman presented with fever and malaise. Three blood cultures were positive for Streptococcus sanguis. A diagnosis of endocarditis was made and the patient was treated with intravenous penicillin and gentamicin. Endocardiography revealed a large left atrial tumour. At operation a myxoma covered by deposits of fibrin was excised. Microscopy revealed massive infiltrates of neutrophils and remnants of bacteria, indicating that this myxoma was a nest for infection.     

Postoperative atrial fibrillation in patients with left atrial myxoma

Paroxysmal atrial fibrillation (AF) is the most common arrhythmia following cardiac surgery such as coronary artery bypass grafting (CABG), and often occurs between the second and fourth postoperative days.1,2 The reported incidence of paroxysmal AF after CABG surgery varies widely, from five to 40%, which is lower than in cases of valvular cardiac surgery.3,4 Although this arrhythmia is usually benign and self-limiting, it may also be associated with increased risk of embolic events, haemodynamic instability, haemorrhagic complications, prolonged hospital stay and higher rates of re-admissions, increasing the healthcare costs.5-7Several risk factors have been proposed for paroxysmal AF after CABG or valvular cardiac surgery, such as advanced age, genetic predisposition, chronic obstructive pulmonary disease, heart failure or increased peri-operative ischaemia.8-10 In addition, certain echocardiographic parameters such as left atrial (LA) diameter or left ventricular (LV) function, and electrocardiographic parameters including P-wave duration and P-wave dispersion (Pd) have been shown to be associated with postoperative AF.11-13Although postoperative AF and its predictors after CABG and valvular surgery have been well researched, no study has been performed to explore the incidence or predictors of postoperative AF in patients with LA myxoma. The aim of this study was to identify the prevalence and predictors of postoperative AF in a pure cohort of patients with LA myxoma.     

The transesophageal echocardiographic diagnosis of left atrial myxoma simulating a left atrial thrombus in the setting of mitral stenosis

We report the case of a 56-year-old woman with a history of rheumatic heart disease. The clinical, electrocardiographic, and radiologic findings suggested mitral stenosis. Left atrial obstructive myxoma simulating a thrombus was found by transthoracic echocardiography (TTE). The diagnosis was established by use of transesophageal echocardiography (TEE), confirmed after surgery and by anatomical investigation. Cardiac myxoma associated with mitral stenosis may be difficult to diagnose accurately using TTE. The advantage of TEE in this case and in patients with mitral stenosis is emphasized.