<unk>  across the precordium refers to an electrocardiographic finding where the normal increase in R wave amplitude as one progresses from V1 to V6 is lost.  Although non-specific, this finding is consistent with a prior anterior myocardial infarction.
Poor R Wave Progression
Sine wave pattern
Displaced point of maximal impulse
U wave alternans
Inverted P wave
Retrograde P wave
T wave inversion
Early repolarization