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| Correlation between ECG manifestation and recent left ventricular function in patients with ST-segment elevation acute myocardial infarction |
| Li Qiang, Tian Wen-fen, Ye Zhuo-lian |
| (Department of Electrocardiogram, the Peoples Hospital of Meizhou, Meizhou Guangdong 514031,China) |
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Abstract Objective To explore the correlation between ECG manifestation and recent left ventricular function in patients with ST-segment elevation acute myocardial infarction(STEAMI). Methods Examinations of ECG and echocardiogram were carried out on 60 STEAMI patients on admission and three months later. The results were analyzed. Results In lead V1－V6, the ST-segment elevation magnitude was summed up to 1.72 mV, R-wave amplitude to 3.28 mV, and Q-wave amplitude to 2.83 mV. Q-wave was found in 5 leads. The maximum amplitude of ST-segment elevation was 4.32 m. The left ventricular end diastolic dimension(LVEDd) was 51.34 mm. The left ventricular ejection fraction(LVEF) in acute phase was 56.19%. By Killip classification, 32 cases were classified into grade 1, 15 in grade 2, 10 in grade 3, and 3 in grade 4. After three months, LVEDd and LVEF was 45.87 mm and 59.20%, respectively. The sum of ST-segment elevation magnitude and Q-wave amplitude, and the lead number of Q-wave behaved positively correlated to Killip classification and LVEDd three months later (r=0.54, 0.52) while they were negatively correlated to LVEF three months later (r=-0.56). The sum of R-wave amplitude was also negatively correlated to LVEDd three months later (r=-0.61), and positively correlated to LVEF three months later (r=0.46). Conclusion The ST-segment elevation magnitude, R-wave amplitude, Q-wave amplitude, lead number of Q-wave, etc. prove to be closely related to left ventricular function for STEAMI patients, which could be applied in predicting recent left ventricular function.
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2015, Vol. 24 
