Abnormalities of the S-T segment--Part I.

Abstract:

:The usual normal S-T segment of the surface electrocardiogram (ECG) contributes little to the diagnostic procedure. When the S-T segment is too long or too short, or when it is displaced upward or downward, it is commonly abnormal. Under such circumstances, an S-T segment abnormality usually contributes considerable diagnostic information. When the Grant method of ECG interpretation is used, it is possible to perceive abnormalities of the S-T segment that may otherwise be ignored or misinterpreted. This paper describes the method of identification and the significance of primary and secondary S-T segment abnormalities. When a mean vector constructed for the S-T segment displacement seen in 12 ECG leads is relatively parallel with a mean vector representing the T wave, it is, with a few exceptions, part of the repolarization process and is therefore part of the T wave. This may be called a secondary S-T segment abnormality. When a mean vector constructed for the S-T segment displacement seen in 12 ECG leads is not relatively parallel with a mean vector representing the T wave, it is, with a few exceptions, not part of the repolarization process and is therefore not part of the T wave. This may be called a primary S-T segment abnormality.

journal_name

Clin Cardiol

journal_title

Clinical cardiology

authors

Hurst JW

doi

10.1002/clc.4960200602

subject

Has Abstract

pub_date

1997-06-01 00:00:00

pages

511-20

issue

6

eissn

0160-9289

issn

1932-8737

journal_volume

20

pub_type

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