John Hay (1873-1959) English physician first to record second degree atrioventricular (AV) block now better known as Mobitz type II AV block
Karel Frederik Wenckebach (1864-1940) Dutch physician. Eponymously affiliated with Wenckebach block (Mobitz type I AV block).
Eponymythology of Second-degree Atrioventricular (AV) block including Luciani, Galabin, Wenckebach, Hay and Mobitz
Heart Block and Conduction Abnormalities with first, second, third degree blocks; and fascicular blocks
Woldemar Mobitz (1889-1951) was a Russian-German physician. Applied mathematical approach to arrhythmias 1924 Mobitz Type I and II AV Block