Ansalone G, Iannarelli M, Loperfido F, Bellocci F, Fiorilli R, Digaetano A, Zecchi P
G Ital Cardiol. 1980;10(11):1557-63.
A computer program for the on-line analysis of the carotid pulse (CP) and of the apexcardiogram (ACG) is described. The program measures the absolute and the heart rate-corrected time intervals, the time intervals ratios, the amplitude absolute values, the quantitative ACG (DA/Dt), the ejection fraction and the circumferential fiber shortening velocity, according to Antani. Normalized amplitude and angular ACG items are also calculated. 80 normal subjects were examined to evaluate the reliability of the computer measurements in comparison with the manual measurements and to establish normal computerized values. No significant differences resulted in the comparison of the manual and computerized measurements. The normal computerized values are quite similar to those reported in the literature. The systolic time intervals (STI) were derived from the CP/phonocardiogram recording and directly from the ACG, utilizing the second peak of the first ACG derivative as marker of the onset of the ejection period. The left ventricular ejection time was 286.36 +/- 14 and 282.35 +/- 21.80 (no significant difference) and the pre-ejection period 87 +/- 14 and 93.16 +/- 23.16 (no significant) utilizing the CP/phonocardiogram and the ACG respectively. The results demonstrate a good reliability of the computer system and the usefulness of the system in the direct estimate of the STI from the ACG.
描述了一种用于在线分析颈动脉搏动（CP）和心尖搏动图（ACG）的计算机程序。该程序根据安塔尼的方法测量绝对时间间隔和心率校正后的时间间隔、时间间隔比率、振幅绝对值、定量ACG（DA/Dt）、射血分数和圆周纤维缩短速度。还计算了归一化振幅和角度ACG项。对80名正常受试者进行了检查，以评估计算机测量相对于手动测量的可靠性，并建立正常的计算机化值。手动测量和计算机化测量的比较未产生显著差异。正常的计算机化值与文献报道的非常相似。收缩期时间间隔（STI）通过CP/心音图记录得出，也直接从ACG得出，利用第一个ACG导数的第二个峰值作为射血期开始的标志。分别利用CP/心音图和ACG时，左心室射血时间为286.36±14和282.35±21.80（无显著差异），射血前期为87±14和93.16±23.16（无显著差异）。结果表明该计算机系统具有良好的可靠性，且该系统在从ACG直接估计STI方面很有用。
