cardiogram(n = noun.communication) ecg, ekg, electrocardiogram - a graphical recording of the cardiac cycle produced by an electrocardiograph; Array
is a kind of graph, graphical record
is a part of checkup, health check, medical, medical checkup, medical exam, medical examination

   Any instrumental record made of heart activity, especially the curve or tracing made by a cardiograph. Sometimes used synonymously with electrocardiogram. [Webster 1913 Suppl.]

cardiogram, n. a record of muscle activity within the heart, made by a cardiograph.