841. A victim of onchoceriasis, not yet 40 years old, being led by a child Subject(s): World Health Organization
842. [A patient is being assisted while walking shortly after eye surgery] Subject(s): BandagesPatientsWorld Health Organization
843. The surgical instrument used here for a cataract operation ... is known as a cryoprobe Subject(s): OphthalmologySurgical InstrumentsCataract ExtractionWorld Health Organization
844. ... the injection of a contrast medium (usually iodine compound) via a flexible tube Subject(s): Cardiovascular DiseasesWorld Health Organization
845. [Miniature transmitter used to monitor heartbeats] Subject(s): Cardiovascular DiseasesEquipment and SuppliesWorld Health Organization
846. The sound of the dog's heartbeats is picked up by a microphone stuck to his fur Subject(s): Cardiovascular DiseasesEquipment and SuppliesWorld Health Organization
847. The passage of the dye through the blood vessels is recorded by two small photo-electric cells Subject(s): Cardiovascular DiseasesEquipment and SuppliesWorld Health Organization
848. Congenital malformations of the heart originate in the embryo Subject(s): Cardiovascular DiseasesWorld Health Organization
849. Dr. [Zdenek] Rychter produces his own tools for his very delicate operations Subject(s): Cardiovascular DiseasesEquipment and SuppliesWorld Health Organization
850. ... micro x-ray photographs of a chick embryo heart from 3rd to 11th day Subject(s): World Health Organization