Cardiovascular Disorders and COVID-19

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Mitra Chitsazan, M.D.[2]Mandana Chitsazan, M.D. [3]

Complications

Arrhythmias

Pathophysiology:

Respiratory disease is the chief target of Coronavirus disease 2019 (COVID-19). One-third of patients with severe disease also reported other symptoms including arrhythmia. According to a study done in Wuhan, China, 16.7% of hospitalized and 44.4% of ICU patients with COVID-19 had arrhythmias. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) utilizes S-spike to bind to angiotensin-converting enzyme 2 (ACE2) receptors to enter the cells. Type 1 and type 2 pneumocytes exhibit ACE 2 receptors in the lung. Studies report that coronary endothelial cells in the heart and intrarenal endothelial cells and renal tubular epithelial cells in the kidney exhibit ACE2. ACE2 is an inverse regulator of the renin-angiotensin system.The interaction between SARS-CoV2 and ACE2 can bring about changes in ACE2 pathways prompting intense injury to the lung, heart, and endothelial cells. Hypoxia and electrolyte abnormalities that are common in the acute phase of severe COVID-19 can potentiate cardiac arrhythmias. Binding of SARS-CoV-2 to ACE2 receptors can result into hypokalemia which causes various types of arrhythmia. Elevated levels of cytokines as a result of the systemic inflammatory response of the severe Coronavirus disease 2019 (COVID-19) can cause injury to multiple organs, including cardiac myocytes. According to the data based on studies on previous Severe acute respiratory syndrome (SARS) and the Middle East respiratory syndrome (MERS) epidemic and the ongoing COVID-19 outbreak, multiple mechanisms have been suggested for cardiac damage.

Signs and Symptoms:

Arrhythmia or conduction system disease is the nonspecific clinical presentation of COVID-19. Patients may be tachycardic (with or without palpitations) in the setting of other COVID-19-related symptoms (eg, fever, shortness of breath, pain, etc).

• According to a study done in Hubei province,palpitations were reported as a presenting symptom by 7.3 percent patients.
• According to a multicenter study done in New York that involved 4250 COVID-19 patients, 260 patients (6.1 percent) had corrected QT interval (QTc) >500 milliseconds at the time of admittance. However, in another study that involved 84 patients who got hydroxychloroquine and azithromycin, the baseline QTc interval was 435 milliseconds before receiving these medications.
• According to a study, among 393 patients with COVID-19, atrial arrhythmias were more common among patients requiring invasive mechanical ventilation than noninvasive mechanical ventilation (17.7 versus 1.9 percent)
• According to a study done in Wuhan, China. among 187 hospitalized patients with COVID-19, 11 patients (5.9 percent) developed ventricular tachyarrhythmias.