PO-05-194 CARDIAC ARRHYTHMIAS AMONG MYOCARDITIS PATIENTS POSITIVE WITH COVID-19 AND ASSOCIATED MORTALITY RISK; AN ANALYSIS FROM THE 2020 NATIONAL INPATIENT SAMPLE

Abstract

Viruses are the most common cause of myocarditis. With the ongoing COVID-19 pandemic, several cases of myocarditis have been reported in COVID-19 positive patients. Such patients may also experience a variety of arrhythmias that can provoke death. To evaluate the presence of various cardiac arrhythmias among COVID-19 positive myocarditis patients and understand their impact on mortality. COVID-19 positive patients, admitted between April 1st 2020 to December 31st 2020, were recruited from the 2020 National Inpatient Sample. The presence of myocarditis and various cardiac arrhythmias were also identified via their respective ICD-10 codes. Logistic regression models were used to identify the odds of mortality in the presence of myocarditis. We further proceeded to estimate the odds of mortality among myocarditis patients who had various arrhythmias. Our study found 6135 (0.4%) patients with myocarditis among 1628110 cases of COVID-19 recorded in the United States between April to December 2020. Age ranged between 0 - 90 years with a mean of 58 years. Multiple cardiac arrhythmias were also observed among myocarditis patients as 310 (5.1%) recorded supraventricular tachycardia, 520 (8.5%) had ventricular tachycardia, 120 (2.0%) had ventricular fibrillation, 520 (8.5%) had paroxysmal atrial fibrillation, 165 (2.7%) had atrial flutter, and 20 (0.3%) had long QT syndrome. The presence of myocarditis was linked with higher odds of mortality among all COVID-19 patients (aOR 2.551, 95% CI 2.405-2.706, p<0.01). Various cardiac arrhythmias were also potential predictors of mortality among myocarditis cases in COVID-19 patients, such as supraventricular tachycardia (aOR 1.346, 95% CI 1.041-1.74, p=0.023), ventricular tachycardia (aOR 1.896, 95% CI 1.557-2.308, p<0.01), ventricular fibrillation (aOR 4.161, 95% CI 2.74-6.319, p<0.01), and atrial flutter (aOR 1.485, 95% CI 1.047-2.106, p=0.026). Myocarditis was associated with higher mortality among COVID-19 admissions. Arrhythmias such as supraventricular tachycardia, ventricular tachycardia, ventricular fibrillation, and atrial flutter were predictive of higher mortality in these patients. Continued caution is advised among health-care providers encountering these arrhythmias in myocarditis patients who are COVID-19 positive.