Resumo

LLERENA ROJAS, Luis Roberto  e  LLERENA ROJAS, Lorenzo D.. Sustancias de contraste para estudios radiográficos en cardiología intervencionista. Rev cubana med [online]. 2002, vol.41, n.3, pp. 167-173. ISSN 1561-302X.

The radiographic contrast agents (CA) used in cardiology are classified into: 1. Very high osmolality ionic contrast agents (VHO); 2. Not very high osmolality nonionic contrast agents (NVHO); 3. NVHO ionic contrast agents; 4. Isoosmolar nonionic contrast agents. All the VHO contrast agents are ionic, monomeric and triiodinated: a ring of benzene with 3 iodine atoms. The NVHO ionic contrast agents are dimeric and hexoiodinated: 2 rings of benzene and 6 iodine atoms. The NVHO nonionic contrast agents are monomeric and triiodinated and the isosmolar contrast agents are dimeric and hexaiodinated. Generally, the CA are more viscuous than blood, mainly the dimeric ones. All of them may cause adverse reactions, including death, although they are less frequent with NVHO CA, but their use is limited because of its high price. There is no consensus about the best CA, since there are discrepancies in the randomized clinical trials.

Palavras-chave : CONTRAST MEDIA [adverse effects]; OSMOLAR CONCENTRATION; MYOCARDIAL ISCHEMIA [radiography]; HEART DISEASES [radiography].

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