What's the difference between i.e. and e.g.?
Wenckebach period Wenck·e·bach period (věn'kə-bāk', -bäKH')
A sequence of cycles in the electrocardiogram ending in a dropped beat due to atrioventricular block, with the preceding cycles showing progressively lengthening P-R intervals; the P-R interval following the dropped beat is again shortened.