The area of a structure in this organ is related to a mean pressure gradient in the Gorlin equation. That structure in this organ bulges, or “balloons,” in Barlow’s syndrome. (-5[1])S3 and S4 are two “gallop” signs used to evaluate this organ’s function. A rare (-5[1])congenital defect of this organ (-5[1])is marked by thickening leading to stenosis, (15[3])as well as (-5[1])this organ’s upper section developing too far to the right. (15[1])The chordae tendineae (15[2])regulate (15[2]-5[1])the (15[1])opening (15[1])and closing of structures in this organ (15[2])that are affected (15[2])by the (15[1])(*) Tetralogy (10[1])of Fallot. (10[1])“Regurgitation” (10[3])in this organ (10[1])is indicated by the splintering (-5[1])of (10[1])R waves in the QRS (10[1])complex. (10[1])The conduction of electrical (10[1])signals by this organ’s (10[1])AV and SA (10[1])nodes (10[2])are measured in an (10[1])ECG. (10[3])For 10 (10[1])points, (10[1])name this organ whose tricuspid, mitral, and aortic valves regulate the pumping of blood. (10[1])■END■ (0[1])