Electrocardiography is an important medical invention in the 20th century Gallery Electrocardiography is an important medical invention in the 20th century News and articles Electrocardiography is an important medical invention in the 20th century Willem Einthoven found the beat and [...] By raham419|2023-01-16T09:13:11+03:3003/01/2023|News and articles|0 Comments Read More