A Case of Quadricuspid Aortic Valve Regurgitation: The Cardiac Clover

Table 1

Hurtwitz-Robinson classification of quadricuspid aortic valve.

Type	Description	Morphology
Type A	(4) Identical cusps
Type B	(3) Identical and (1) smaller cusp
Type C	(2) Identical and (2) smaller cusps
Type D	(1) Large, (2) intermediate, and (1) small cusp
Type E	(3) Identical and (1) larger cusp
Type F	(2) Larger identical and (2) smaller nonidentical cusps
Type G	(4) Nonidentical cusps