Objective To analyze the correlation among electrocardiogram (ECG), cardiac ultrasound and
heart function in patients with emergency heart failure (HF). Methods The patients with emergency HF (n=100)
were chosen into observation group and synchronous healthy controls with routine body examinations (n=100)
were chosen into control group from Hospital of Traditional Chinese Medicine of Huairou District of Beijing from
Oct. 2020 to Oct. 2021. All groups were given examinations of ECG and cardiac ultrasound and the results were
compared. According to the classification standard of New York Heart Association (NYHA), the heart function
classification was conducted in patients in observation group, and the results of ECG and cardiac ultrasound
examinations were compared among patients with different NYHA grades. The correlation among ECG, cardiac
ultrasound and heart function classification was analyzed by using Pearson correlation analysis. Results The
indexes of heart rate (HR), QT interval, QTc interval, QTd interval, left ventricular diastolic diameter (LVDD), left
ventricular systolic diameter (LVSD), left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic
volume (LVESV) and left atrial diameter (LAD) were all higher in observation group than those in control group
(P<0.05). The peak flow velocity ratio (E/A) and left ventricular fraction shortening (LVFS) were lower in observation
group than those in control group (P<0.05). The indexes of interventricular septal thickness (IVST), left ventricular
posterior wall thickness (LVPWT), stroke volume (SV), cardiac output (CO) and cardiac index (CI) were similar
between 2 groups (P>0.05). The indexes of HR, QT interval, QTc interval, QTd interval, LVDD, LVDS, LVEDV,
LAD and LVFS had significant difference in patients with different NYHA grades in observation group (P<0.05).
The results of Pearson correlation analysis showed that heart function classification was positively correlated to
HR, QT interval, QTc interval, QTd interval, LVDD, LVDS, LVEDV and LAD, and negatively correlated to LVFS.
Conclusion ECG and cardiac ultrasound are significantly correlated to heart function classification in emergency
HF patients, which can be used as a reference for clinical evaluation of heart function .