QT dispersion and principal component analysis in prehospital patients with chest pain

被引：3

作者：

Aufderheide, TP ^{[1
]}

Reddy, S ^{[1
]}

Xue, Q ^{[1
]}

Dhala, A ^{[1
]}

Thakur, RK ^{[1
]}

Brady, WJ ^{[1
]}

Rowlandson, I ^{[1
]}

机构：

[1] Med Coll Wisconsin, Marquette Med Syst, Milwaukee, WI 53226 USA

来源：

COMPUTERS IN CARDIOLOGY 1997, VOL 24 | 1997年 / 24卷

关键词：

D O I：

10.1109/CIC.1997.648138

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

The objective of this study was to measure QT dispersion (QTD) and principal component analysis (PCA) ratio, using a newly developed algorithm, in a broad range of chest pain patients to determine potential value in diagnosing ischemic heart disease. The algorithm for determining QTD is based on Least-square-Jit technique, which has better reproducibility than threshold and simple slope methods. QTD and PCA measurements were retrospectively computer-calculated in adults with a chief or secondary complaint of chest pain or equivalent syndrome who had prehospital 12-lead ECGs acquired by paramedics. There were 2157 patients with evaluable data in the final study population. 53% were males, 47% females. Using a threshold of 46ms, QTp global measurement had a sensitivity/specificity of 60%/90% for AMI and 28%/90% for angina. For AMI, using a threshold of 31, PCA ratio had a sensitivity/specificity of 35%/90%. These data support the contention that QTD and PCA may be useful diagnostic adjuncts for detection of ischemic heart disease.

引用

页码：665 / 668

页数：4