SARS-CoV-2 infection causes pulmonary shunt by vasodilatation.

Patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may present a significant hypoxemia. The exactly mechanism of such hypoxemia in patients with coronavirus disease 2019 (COVID-19) is not well described. It has been suggested that microthrombosis contributes to this mechanism, increasing pulmonary dead space.

Left atrial myxoma associated with obstructive coronary artery disease.

We describe a case of a 67 year-old patient with obstructive coronary artery disease that, in the preoperative survey for inguinal herniorraphy surgery, discovered, by a two-dimensional echocardiogram, a tumor in left atrium, mobile, non-obstructive. The patient underwent a cineangiocoronariography showing severe stenosis in the left anterior descending artery, moderate stenosis in the left circumflex artery, near the origin of the first marginal branch, and a non-obstructive plaque in the right coronary artery. There was also moderate left ventricular dysfunction.