The left ventricle is conical in shape with an anteroinferiorly projecting apex and is longer with thicker walls than the right ventricle. It is separated from the right ventricle by the interventricular septum, which is concave in shape (i.e. bulges into the right ventricle). Internally, there are smooth inflow and outflow tracts and the remainder of the left ventricle (mainly apical) is lined by fine trabeculae carneae. The ventricular wall is thickest at the base and thins to only 1-2 mm at the apex.
- anterior lateral (anterolateral)
- posterior medial (posteromedial)
- arterial supply
- venous drainage
- anterior: interventricular septum, right ventricle
- posterior: descending aorta, left vagus nerve, sympathetic chain
- superior: left atrium
- right: right side of pleura
- left: left lung pleura and left phrenic nerve
- double-inlet ventricle: inflow from both the right and left atria
- parachute valve: mitral valve chordae tendineae inserting into a single papillary muscle
On contrast-enhanced chest CT and cardiac MRI, the left ventricle when measured on axial slices can be considered enlarged when the transverse diameter is ≥58 mm (male) and ≥53 mm (female) .