There are multiple levels of short axis images depending on how you tilt the probe. The slices show the LV from the base to apex and all four valves.
RVOT - right ventricular outflow tract, PV - pulmonic valve, TV - tricuspid valve, PA - pulmonary artery, RA - right atrium, LA - left atrium, AV - aortic valve, AML - anterior mitral leaflet, PML - posterior mitral leaflet, ALPM - anterolateral papillary muscle, PMPM - posteromedial papillary muscle, RV - right ventricle, LV - left ventricle.
We will review each level
Short Axis: Aortic, Tricuspid and Pulmonic Valve Level
This is the most basal short axis view that lays out the 2 atria, 3 valves and the RV outflow tract. Repeat PW and CW across the tricuspid valve is usually done here. TV - tricuspid valve, RA - right atrium, LA - left atrium, AV - aortic valve, PV - pulmonary valve, RVOT - right ventricular outflow tract, PA - pulmonary artery.
Short Axis: Zoom in on the Aortic Valve
It is quite useful to zoom in on the aortic valve to try to assess whether it is trileaflet. Color Doppler here can also help tell the origin of a regurgitant jet. The cusps can always be identified as follows, whether in this view, the subcostal view or via TEE: the intra-atrial septum always intersects the non coronary cusp; the right coronary cusp is the most anterior and abuts the right ventricular outflow tract. The left coronary cusp is therefore the one that is left. Sometimes slight angulation will allow visualization of the left main and right coronary arteries. RCC - right coronary cusp, LCC - left coronary cusp, NCC - non coronary cusp.