Estimation of Left Ventricular Volume by One‐Plane Cineangiography
Estimation of Left Ventricular Volume by One‐Plane Cineangiography
复制标题
通过单平面电影血管造影估计左心室容积
作者：
D. Greene;R. Carlisle;C. Grant;I. Bunnell
左心室容积的单平面电影血管造影测量使用右前斜位的心血管造影片。它的基本假设是第三个（不可见）维度，即从隔膜到游离壁的深度，与可见短轴具有相同的大小和行为方式。用双平面X射线设备检查这一假设，发现未测量的长度平均少7%，并直接随测量的短轴长度而变化。测量的体积与使用连续双平面X射线的连续研究相关性良好，并且系统地比用硫酸钡糊剂注射的尸检标本中获得的体积稍大。该方法容许患者定位的变化，方便，从一个有经验的观察者到另一个观察者产生可重复的分析，允许每秒60次体积测量，以便可以研究快速心脏事件，并且小剂量的X射线和造影剂允许在一次导管插入会话中进行多次观察。这意味着可以通过半连续容量测量和压力-容量分析的信息技术来研究药物和其他干预措施的影响。
One-plane cineangiographic measurement of left ventricular volume uses angiocardiograms taken in the right anterior oblique view. Its basic assumption is that the third (unvisualized) dimension, depth from septum to free wall, is of the same magnitude and behaves in the same way as the visualized short axis. Examination of this assumption with biplane x-ray equipment revealed that the unmeasured length averages 7% less and varies directly with the length of the measured short axis. Volumes measured correlate well with consecutive studies using serial biplane x-rays and are systematically somewhat larger than volumes obtained in autopsy specimens injected with barium sulfate paste. The method is tolerant of variations in positioning of the patient, is convenient, yields repeatable analyses from one experienced observer to another, allows 60 volume measurements per second so that rapid cardiac events can be studied, and the small doses of x-rays and contrast medium permit several observations at one catheterization session. This means that effects of drugs and other interventions can be studied by the informative techniques of semi-continuous volume measurement and pressure-volume analysis.