heart beat pulse monitor, electrocardiogram display or medical chart background. green heartbeat pulse life line of digital

heart beat pulse monitor medical electrocardiogram cardiogram vector green cardio healthcare digital wave background cpr line ecg chart alive cardiology frequency life concept light abstract meter flat rate rhythm symbol heartbeat ekg attack hospital healthy normal active sinus electrical conduction system electrogastrogram electropalatography emergency medicine cardiopulmonary resuscitation seamless black display background