[Relation of the ST-segment elevation pattern in acute phase of anterior wall acute myocardial infarction to short-term prognosis].
OBJECTIVE
To observe the relation of ST-segment elevation pattern of electrocardiogram (ECG) recorded in acute phase of anterior wall acute myocardial infarction (AMI) to short-term prognosis.


METHODS
Sixty-two patients with first anterior wall AMI were divided into 3 groups according to ST-segment elevation pattern in lead V3 of a 12-lead ECG at admission. Patients in group A (n=18) were characterized by concave type of ST-segment elevation, group B (n=27) by straight type and group C (n=17) by convex type. The peak value of serum creatine phosphate kinase (CPK) and left ventricular ejection fraction (LVEF) were measured. The incidence of serious complications (including malignant arrhythmia, left ventricular dysfunction and cardiogenic shock) and mortality within the initial 4 weeks of hospitalization were recorded.


RESULTS
The median value of peak CPK of the 3 groups was 2 014.4, 4 486.8 and 5 826.9 IU/L respectively, and the peak value of CPK in group A was much lower than that in groups B and C (  D<0.05 and P<0.01, respectively). LVEF measured by echocardiogram within 14 d after myocardial infarction were 61.2%, 48.6% and 38.7% respectively, showing significant difference between groups A and B and between groups B and C (P<0.05) as well as between group A and C (P<0.01). The incidences of serious complications and mortality within 4 weeks after AMI in group A were much lower than those in groups B and C (P<0.05), but there was no significant difference between groups B and C (  D>0.05).


CONCLUSIONS
The shape of ST-segment elevation in lead V3 of a 12-lead ECG in acute phase of anterior wall AMI may reflect the severity of myocardial ischemic injury, and convex type of ST-segment elevation in lead V3 in acute phase often indicate poor short-term prognosis.
Gao
Yu-Qi
YQ
Department of Cardiology, Zhujiang Hospital  ?First Military Medical University, Guangzhou 510282, China.
Li
Zhi-Liang
ZL
Ding
Ming-Xue
MX
Wu
Hong-Chao
HC
Li
Gong-Xin
GX
D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000401:mortality / Q000503:physiopathology; D011379:Prognosis; D012189:Retrospective Studies