Clinical significance of reciprocal ST segment depression in acute myocardial infarction: Analysis based on the time interval from the onset of symptoms.
- Author:
Hyuk Jae CHANG
1
;
In Whee PARK
;
Jung Eun KIM
;
Jong Woo LEE
;
So Yeon CHOI
;
Gyo Seung HWANG
;
Myeong Ho YOON
;
Joon Han SHIN
;
Seung Jea TAHK
;
Byung Il CHOI
Author Information
1. Department of Internal Medicine and Cardiology, Ajou University School of Medical, Suwon, Korea. hjchang70@hotmail.com
- Publication Type:Original Article
- Keywords:
Myocardial infarction;
Electrocardiogram
- MeSH:
Depression*;
Electrocardiography;
Humans;
Incidence;
Myocardial Infarction*;
Retrospective Studies
- From:Korean Journal of Medicine
2003;64(1):34-40
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: To investigate the clinical significance of reciprocal ST segment depression on the presenting electrocardiogram (ECG) in patients with acute myocardial infarction (MI), in particular, this study focuses whether there is any difference according to the time interval between the onset of symptoms and initial ECG. METHODS: ECG findings in 198 patients with acute MI were retrospectively reviewed. The patients were classified into 4 subgroups based on the infarct region and reciprocal ST depression. The clinical data and angiographic finding were compared in each region. We also explored whether any differences could be recognized according to the time interval. RESULTS: Of 78 anterior MI, 16 (21%) showed a reciprocal ST depression and 62 (80%) did not. Of 120 inferior MI, 50 (41%) displayed a reciprocal ST depression and 70 (59%) did not. In each region, a reciprocal ST depression made no difference between the two groups. However, when divided by the time interval, a reciprocal ST depression more than 4 hours after MI predicted a high incidence of multivessel disease [anterior MI 5/6 (83%), 10/12 (83%): p<0.05 for each]. CONCLUSION: There was a high incidence of multivessel disease when a reciprocal ST segment depression continued for more than 4 hours after MI. The meaning of a reciprocal ST depression can be interpreted differently according to the duration after MI.
