beat display graphic green heart life monitor pulse screen diagnostic doc ecg ekg emotion feeling heart attack heart beat heartbeat hospital illness medical prevention protection Rhythm sick stripe therapy beats blood cure diseas Doctor equipment health ill medic nurse nursing pressure steth stethescope abstract backdrop background card cherrish fantasy fiction Fractal gramps illustration love orange red romance romantic valentine wallpaper dez pain Earthquake emergency geometric graph heart failure lie detector light measurement meter oscilloscope rate richter scale science seismic sickness squares urgent vector xymonau zig zag activity analyze cardiogram electric electrical electrocardiogram electronic frequency hospitalization ICU instrument intensive care modern monitoring operation theatre oxygen pattern saturation support technology tool art city color digital skyline