Louis Nelson Katz
Louis Nelson Katz (1897-1973) was an American cardiologist. Katz is eponymously associated with Katz-Wachtel phenomenon (1937)
diphasic QRS complexes
Katz-Wachtel phenomenon
Katz-Wachtel phenomenon: Large biphasic QRS complexes (tall R waves + deep S waves) in V2-5. First described by Louis Nelson Katz in 1937