diagnostic doc ecg ekg emotion feeling heart heart attack heart beat heartbeat hospital illness medical prevention protection Rhythm sick stripe therapy 3D abstract anniversary background concept creation decorative design engagement february 14th graphic health healthy heart disease heart problems image love marriage mothers day New red romance romantic scarlet valentine valentine's day vector wedding white aqua arrows battle for the heart birthday blue cartoon colourful colours decoration fun get well gradient green illustration modern pink pretty psychedelic purple scrapbooking shape spring symbol yellow beat dez pain Earthquake emergency equipment geometric graph heart failure lie detector light measurement meter monitor oscilloscope pulse rate richter scale science seismic sickness squares urgent xymonau zig zag