1 is squeezed to force air through apertures or passages 35 and 36 into the bell 10 the ring 20 is placed against the patient 39 s skin and the bulb 1 is released this causes the air to flow from the bell 10 to the bulb 1 through apertures 35 and 36 creating a partial vacuum drawing the bell 10 toward the patient 39 s skin in other words the ring 20 is caused to collapse forming an airtight seal between the bell 10 and the patient 39 s skin and drawing the sponge 53 against the patient 39 s skin from the foregoing description it can be seen that the present invention provides a vector lead device which is universally adaptable to all current ekg machines and which eliminates the necessity of electrically conductive jellies by providing a single disposable contact the contact of the vector lead device with the skin is improved by providing a soft pliable rubber ring 20 at its base the invention also provides a single contact pad of approximately one half inch thereby obviating the necessity of multiple sized 34 bells 34 while improving the quality of the ekg studies furthermore the single disposable contact is easy to manufacture and results in less employee time and ancillary equipment in the performance of ekg 39 s in a particular embodiment the rubber bulb 1 has substantially a suction cup structure and is of sufficient size to evacuate the air from the chamber of bell 10 this vacuum will pull the bell 10 against the skin collapsing the rubber ring 20 which will bring the electrically conductive pad 53.