291. 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
292. 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
293. Congenital malformations of the heart originate in the embryo Subject(s): Cardiovascular DiseasesWorld Health Organization
294. Dr. [Zdenek] Rychter produces his own tools for his very delicate operations Subject(s): Cardiovascular DiseasesEquipment and SuppliesWorld Health Organization
295. ... micro x-ray photographs of a chick embryo heart from 3rd to 11th day Subject(s): World Health Organization
296. ... studying blood circulation in the new-born Subject(s): Cardiovascular DiseasesWorld Health Organization
297. Stockholm's Karolinska hospital - this boy works a stationary bicycle while his heart is being tested for abnormalities Subject(s): Cardiovascular DiseasesNursesChildSwedenWorld Health Organization
298. The doctor takes throat swabs for laboratory examination Subject(s): NursesHealth EducationChildPhysiciansPhysical Examination
299. ... autopsy specimens of coronary arteries Subject(s): Cardiovascular DiseasesWorld Health Organization
300. Measuring the blood pressure Subject(s): Equipment and SuppliesNursesStethoscopesWorld Health Organization