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Ecg loop background video1970-01-01T00:00:00+00:00Accurate ekg pattern loopable background, green on black. PT17Shttps://d38zjy0x98992m.cloudfront.net/be670c94-0626-11e3-943b-196092505471/ecg_update_xlarge.jpghttps://d38zjy0x98992m.cloudfront.net/be670c94-0626-11e3-943b-196092505471/ecg_update_mp4_hd_video.mp4