title: Changes in P-R interval immediately before, during, and after acute myocardial infarction.
abstract: A 48 years old male developed acute cardiac pain manifested by prolonged P-R interval as the only electrocardiographic sign. Subsequently the electrocardiogram evolved an acute myocardial infarction with a normal P-R interval. Immediately therafter prolonged P-R interval reappeared to become established even after digitalis was long discontinued.
mesh_terms: D000208:Acute Disease; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis*