Korean Circ J.  2021 Oct;51(10):851-862. 10.4070/kcj.2021.0116.

Electrocardiographic Manifestations in Patients with COVID-19: Daegu in South Korea

  • 1Division of Cardiology, Daegu Catholic University College of Medicine, Daegu, Korea
  • 2Division of Cardiology, Daegu Fatima General Hospital, Daegu, Korea
  • 3Division of Cardiology, Yeungnam University College of Medicine, Daegu, Korea
  • 4Division of Cardiology, Kyungpook National University, Daegu, Korea
  • 5Division of Cardiology, Keimyung University Dongsan Medical Center, Daegu, Korea
  • 6Division of Cardiology, Daegu Veterans Hospital, Daegu, Korea
  • 7Division of Cardiology, Kyungpook National University Chilgok Hospital, Daegu, Korea


Background and Objectives
As the coronavirus disease 2019 (COVID-19) spreads worldwide, cardiac injury in patients infected with COVID-19 becomes a significant concern. Thus, this study investigates the impact of several electrocardiogram (ECG) parameters and disease severity in COVID-19 patients.
Seven medical centers in Daegu admitted 822 patients with COVID-19 between February and April 2020. This study examined 267 patients among them who underwent an ECG test and evaluated their biochemical parameters like C-reactive protein (CRP), log N-terminal pro-B-type Natriuretic Peptide (NT-proBNP), cardiac enzyme, and ECG parameters (heart rate, PR interval, QRS interval, T inversion, QT interval, and Tpe [the interval between peak to end in a T wave]).
Those patients were divided into 3 groups of mild (100 patients), moderate (89 patients), and severe (78 patients) according to clinical severity score. The level of CRP, log NT-proBNP, and creatinine kinase-myocardial band were significantly increased in severe patients. Meanwhile, severe patients exhibited prolonged QT intervals (QTc) and Tpe (Tpe-c) compared to mild or moderate patients. Moreover, deceased patients (58; 21.7%) showed increased dispersion of QTc and Tpe-c compared with surviving patients (78.2±41.1 vs. 40.8±24.6 ms and 60.2±37.3 vs. 40.8±24.5 ms, both p<0.05, respectively). The QTc dispersion of more than 56.1 ms could predict the mortality in multivariate analysis (odd ratio, 11.55; 95% confidence interval, 3.746–42.306).
COVID-19 infections could involve cardiac injuries, especially cardiac repolarization abnormalities. A prolonged QTc dispersion could be an independent predictable factor of mortality.


Coronavirus; COVID-19; ECG
Full Text Links
  • KCJ
export Copy
  • Twitter
  • Facebook
Similar articles
    DB Error: unknown error