Harris M A, Valmorida J N
UCLA Medical Center, USA.
Neonatal Netw. 1996 Dec;15(8):61-5.
Generally, cardiac lesions with increased pulmonary blood flow demonstrate cardiomegaly, increased pulmonary vascular markings, and pulmonary congestion on the chest x-ray. These findings occur as a result of the following: 1. A left-to-right shunt or mixing lesion in which excess volume of blood flow causes dilation of cardiac chambers, resulting in the appearance of cardiomegaly, and in which increased pulmonary artery blood flow causes increased pulmonary vascular markings 2. Obstruction of blood flow that produces pulmonary venous hypertension and resultant pulmonary edema The next article in this series will address cardiac lesions with decreased pulmonary blood flow.
一般来说，肺血流量增加的心脏病变在胸部X光片上表现为心脏增大、肺血管纹理增多和肺充血。这些表现是由以下原因导致的：1. 左向右分流或混合性病变，其中过多的血流量导致心腔扩张，从而出现心脏增大，并且肺动脉血流量增加导致肺血管纹理增多；2. 血流梗阻导致肺静脉高压及由此产生的肺水肿。本系列的下一篇文章将讨论肺血流量减少的心脏病变。
