Increased Rheumatoid Factor production in patients with severe COVID-19.

Background: Searching for Rheumatoid Factors (RF) in patients with coronavirus disease (COVID-19) has rarely been described.

Objectives: To investigate the association between RF isotypes (IgM, IgA, and IgG) and different clinical presentations of COVID-19 in a series of Tunisian patients.

Study Design: Eighty-two COVID-19 patients were enrolled in this study.

Pulmonary MALT lymphoma associated with interstitial pulmonary disease.

Interstitial lung disease (ILD) and low-grade Mucosa-associated B-cell lymphoma (MALT lymphoma) are two different disorders of the respiratory system. In some cases, pulmonary MALT lymphoma is seen presenting with interstitial lung disease. We report a case of 42-year-old man presenting with a pulmonary MALT lymphoma associated with interstitial lung disease.

Predictive echocardiographic factors of severe obstructive sleep apnea.

Introduction: obstructive sleep apnea (OSA) is a common chronic pulmonary disease, characterized by repetitive collapse of the upper respiratory airways, leading to oxygen desaturation. This condition is recognized to be associated with cardiovascular disease. Several studies have shown the effects of OSA on both geometry and cardiac function, with conflicting results.

Assessment of right ventricular remodeling and dysfunction in obstructive sleep apnea syndrome: a prospective monocentric study.

Background: Obstructive sleep apnea (OSA) is a common sleep-related disorder that has been implicated in many serious cardiovascular diseases including cardiac remodeling and dysfunction. Since most investigations have focused on the left heart, little is known on right ventricular (RV) involvement in OSA. The role of the RV in the management of cardiovascular outcomes has become increasingly recognized.