“胸闷”常见的英文表达是 “chest tightness” 或 “chest oppression”。
chest tightness：较为常用，直接描述胸部有紧缩、憋闷的感觉。例如：He complained of chest tightness and shortness of breath.（他抱怨说胸闷、气短。）
chest oppression： “oppression” 有“压迫感”的意思，“chest oppression” 同样能准确表达胸闷这种胸部有压迫、憋闷不适的症状。例如：The patient felt chest oppression after physical exertion.（病人在体力活动后感到胸闷 。）