case 1 shows ordinary criss-crossing with supero-inferior ventricle , and case 2 , extreme crossing atrioventricular ( a-v ) valves , in which the right-sided right atrium connects to the left posteriorly positioned right ventricle through the tricuspid valve , and the left-sided left atrium to the right anterior left ventricle via a posteriorly positioned mitral valve .
C0225883
right ventricle
C0040960
tricuspid valve