doctor in protective gloves holds a stethoscope. this is a medical tool for listening to the heart rhytm and

aid background cardiac cardio cardiologist cardiology care check clinic concept coronavirus crackling diagnosis diagnostic disease doctor emergency equipment examination expertise glove gloves hand hands health healthcare heart heartbeat holding holds hospital illness instrument insurance job listening lungs measurement medical medicare medicine occupation patients physician problem professional protective pulse rhythm rhytm sickness specialist stethoscope therapy this tool treatment white