Category: P

  • Papillary muscle

    Any of several muscles associated with the atrioventricular valves of the heart. These muscles contract during systole to prevent regurgitation of blood into the atria. A column of myocardium that arises from the floor of each ventricle. It is attached to the chordae tendinae, which anchor the flaps of the atrioventricular valves during ventricular systole.…

  • Papaverine

    Smooth muscle relaxant used to treat cardiovascular or visceral spasm. Adverse effects include jaundice. An alkaloid, derived from opium, that relaxes smooth muscle. It is administered by mouth or injection to treat muscle spasm in such conditions as colic and in sprays for the relief of asthma. It may cause abnormal heart rate. A smooth-muscle…

  • Panencephalitis

    Inflammation of the entire brain, marked by progressive deterioration of mental and motor skills.  

  • Pandiculation

    Yawning and stretching actions, as when first awakening. Stretching of the limbs and yawning, as on awakening from normal sleep.  

  • Palpebration

    Winking, especially if uncontrolled and persistent.  

  • Palmature

    Condition in which the fingers are webbed. A pathological condition in which the fingers are joined or united.  

  • Packed cells

    Preparation of red blood cells separated from the liquid plasma, used in the treatment of some cases of severe anemia to restore adequate levels of erythrocytes without overloading the circulatory system with too much fluid.  

  • Pyocyanase

    An antibiotic substance elaborated by growing cultures, not therapeutically developed. An antibiotic substance produced by the bacterium Pseudomonas aeruginosa and active principally against Gram-positive bacteria.  

  • Psychrotrophs

    Bacteria capable of growth at 0 – 5°C, but the optimal temperature of which is much higher.  

  • Pseudomonas putida

    Psychrotropic species (grows at 22° C, not at 37° C), connected with fish disease and spoilage.