These structures are sensitive to IKur inhibitors, which prolong their effective refractory period.
These structures are sensitive to IKur inhibitors, which prolong their effective refractory period. A namesake molecule secreted from these structures promotes renal sodium release in opposition to aldosterone and is closely related to brain natriuretic peptide. The embryonic sinus venosus is bounded by a region that becomes the pectinate muscles of these structures. They are depolarized at the start of the PR interval, and the right one of them contains the SA node, which initiates an action potential causing both of them to contract. The mitral valve opens to let blood flow from the left one of these upper chambers. For 10 points, name these cardiac structures that receive blood from the vena cavae and pulmonary vein before passing it to ventricles.
These structures are sensitive to IKur inhibitors, which prolong their effective refractory period.
atria [or right atrium; or left atrium; prompt on heart]