Right Ventricular Failure: Unrecognised high mortality equal to that of LV failure. Right heart is a low-pressure system, good at dealing with volume (preload) to a point, does poorly with increased afterload (i.e. PH).
In emergency medicine and critical care, the cardiac failure that primarily concerns us is acute heart failure syndrome (AHFS), which refers to rapid worsening of heart failure signs and symptoms, and has many possible causes.