failure of the muscle fibers at the lower end of the esophagus to relax, resulting in swallowing difficulty and regurgitation.
cardiospasm car·di·o·spasm (kär’dē-ə-spāz’əm)
See esophageal achalasia.
cardiosphygmograph cardiosphygmograph car·di·o·sphyg·mo·graph (kär’dē-ō-sfĭg’mə-grāf’) n. An instrument for recording graphically the movements of the heart and the radial pulse.
an instrument for measuring the heart rate. cardiotachometer car·di·o·ta·chom·e·ter (kär’dē-ō-tā-kŏm’ĭ-tər, -tə-) n. An instrument for measuring the rapidity of the heartbeat.
adjective of or relating to the heart and the chest Contemporary Examples Although she trained as a cardiothoracic surgeon, childhood nerve damage prevented her from practicing. Women in the World: Amy Lehman, United States The Daily Beast March 5, 2011
- Cardiothoracic ratio
cardiothoracic ratio cardiothoracic ratio car·di·o·tho·rac·ic ratio (kär’dē-ō-thə-rās’ĭk) n. The transverse diameter of the heart, as determined by x-ray examination, compared with that of the thoracic cage, used to help determine enlargement of the heart.