Peri-Infarction Block; Electrocardiographic Abnormality Occasionally Resembling Bundle Branch Block and Local Ventricular Block of Other Types

Curves which represent bundle branch block can usually be identified. More important are those which represent peri-infarction block. Multiple unipolar leads enable identification of the latter from the former, which they may closely resemble in the limb leads, and from intraventricular block of other types. Criteria and examples of peri-infarction block are presented and an incidence and explanation are offered.