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trans·tho·rac·ic -thə-'ras-ik adj
1) performed or made by way of the thoracic cavity
2) crossing or having connections that cross the thoracic cavity <a \transthoracic pacemaker>
trans·tho·rac·i·cal·ly -i-k(ə-)lē adv
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trans·tho·rac·ic (trans″thə-rasґik) performed through the wall of the thorax, or through the thoracic cavity.Medical dictionary. 2011.