31661. [Miniature transmitter used to monitor heartbeats] Subject(s): Cardiovascular DiseasesEquipment and SuppliesWorld Health Organization
31662. 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
31663. 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
31664. Congenital malformations of the heart originate in the embryo Subject(s): Cardiovascular DiseasesWorld Health Organization
31665. Dr. [Zdenek] Rychter produces his own tools for his very delicate operations Subject(s): Cardiovascular DiseasesEquipment and SuppliesWorld Health Organization
31666. ... micro x-ray photographs of a chick embryo heart from 3rd to 11th day Subject(s): World Health Organization
31667. ... studying blood circulation in the new-born Subject(s): Cardiovascular DiseasesWorld Health Organization
31668. Stockholm's Karolinska hospital - this boy works a stationary bicycle while his heart is being tested for abnormalities Subject(s): Cardiovascular DiseasesNursesChildSwedenWorld Health Organization
31669. The doctor takes throat swabs for laboratory examination Subject(s): NursesHealth EducationChildPhysiciansPhysical Examination
31670. ... autopsy specimens of coronary arteries Subject(s): Cardiovascular DiseasesWorld Health Organization