Can Global Longitudinal Strain Assess Asymptomatic Subtle Left Ventricular Dysfunction in Recovered COVID-19 Patients?

Background: Coronavirus disease 2019 (COVID-19) might be associated with cardiac injury as a part of multisystem affection in response to cytokine storms. However, left ventricular (LV) function appears preserved in most of the cases, whereas subtle LV dysfunction might happen in others. Hence, we tried to detect subtle LV dysfunction in patients with COVID-19 using global longitudinal strain (GLS). Patients and Methods: We performed a single-center observational study on 90 stable patients who were recently recovered from mild to moderate COVID-19 infections. A transthoracic echocardiographic examination was done for all patients, and GLS assessment was used as an indicator of LV function. Results: The population age ranged from 27 to 66 years, and the majority of patients were males (54, 73.3%). Besides, 46.7% of the included patients were smokers, 33.3% had hypertension, and 23.3% were diabetics. All the patients had normal LV internal dimensions and ejection fractions. However, 33.3% of them had subclinical LV dysfunction as expressed by reduced GLS. There was no statistically significant correlation between GLS and age, gender, or other risk factors, whereas troponin and C-reactive protein significantly correlated with GLS. Conclusions: Recovered patients from recent mild to moderate COVID-19 infections might show subtle LV dysfunction as manifested by reduced GLS.