Abstract: A portable EKG machine having a plurality of individually storable electrode leads, each of which may be selectively moved from a retracted position wherein the electrode lead is stored within a storage enclosure, to an extended position wherein the electrode lead is drawn from the storage enclosure. The EKG machine of the present invention includes a monitor, a storage enclosure and a plurality of conducting leads each terminating in an electrode. In a preferred embodiment, the storage enclosure includes a plurality of retractable and extendable leads mounted on individual rotatable spools enclosed therein. Each electrode and lead may be individually selectively extended by an EKG technician by grasping and separating an electrode from the storage enclosure thereby unwinding the lead from its storage spool to an extended position, whereafter the electrode may be conductively attached to the patient's body.