Korean Circ J.  1991 Feb;21(1):1-6. 10.4070/kcj.1991.21.1.1.

The Significance of Reciprocal ST-Segment Depression in Acute Inferior Myocardial Infarction

• Cha DH
• Tahk SJ
• Jang YS
• Kim HS
• Yoon JH
• Chung NS
• Shim WH
• Cho SY
• Lee WK

• KMID: 2229113
• DOI: http://doi.org/10.4070/kcj.1991.21.1.1

Abstract

To investigate the significance of precordial ST-segment depression in acute inferior myocardial infarction, electrocardiographic findings in 51 consecutive patients with acute inferior myocardial infarction were analysed with clinical findings and coronary artery angiography. Thirty patients(Group A) had no or <1.0mm ST depression, and twenty one patients(Group B) had > or =1.0mm ST depression in two or more precordial(VI-6) leads were included in this study. Patients in Group B thd greater summed ST-segment elevation in leads II, III, AVF(6.3+/-6.1 vs 2.4+/-2.3mm, p<0.05), higher plasma peak CK levels(1776.8+/-1503.3 vs 5666.6+/-587.7 IU/L, p<0.05), higher plasmal peak CK-MB levels(141.2+/-1553.3 vs 34.1+/-35.7 IU/L, p<0.05), more prevalence of proximal left anterior descending coronary artery disease (46.6% vs 16.6%, p<0.05) than patients in Group A. There was no significant difference between Group A and Group B in the LV ejection fraction, delta area decreasing rate, infarction related asynergy, complications during hospitalization and cardiac events during follow up period. In conclusion, patients with acute inferior myocardial infarction who have associated with precordial ST depression had more extensive myocardial damage probably due to concomitant left anterior descending coronary artery disease.

MeSH Terms

Angiography
Coronary Artery Disease
Coronary Vessels
Depression*
Electrocardiography
Follow-Up Studies
Hospitalization
Humans
Infarction
Inferior Wall Myocardial Infarction*
Plasma
Prevalence