直背综合征系由于上部胸椎平直,生理性后弯消失,致胸腔前后径减小,心脏及大血管在胸骨与脊柱之间受压而产生杂音,往往误诊为器质性心脏病。我们曾遇见1例报道于下。病例介绍患者男性,36岁。于1973年3月3日以发作性心悸、心前区疼痛及头晕3周入院。10年前体检发现心脏有杂 Straight-back syndrome due to the upper thoracic straight, physiological disappearance of posterior curvature, resulting in reduced anteroposterior diameter of the chest, heart and large blood vessels in the sternum and spine pressure generated noise, often misdiagnosed as organic heart disease. We have met one case reported below. Case description Male patient, 36 years old. March 3, 1973 with episodes of palpitations, precordial pain and dizziness 3 weeks admitted. 10 years ago the physical examination found that the heart is mixed