Mechanisms and management of prothrombotic state in COVID-19 disease.

The novel severe acute respiratory syndrome viral disease outbreak due to SARS-CoV-2 is a rapidly evolving disease and represents one of the greatest medical challenges in recent times. It is believed that SARS-CoV-2 has migrated from bats to an intermediate host and then to humans. This article aims at the mechanism and management of prothrombotic state in COVID-19 positive patients. We tried to present how the SARS-CoV-2 virus can induce thromboembolic events and the incidence of these thromboembolic events. We also tried to depict anticoagulation management in these patients as well as postdischarge plan and follow-up. Invasion of type 2 pneumocytes by the SARS-CoV-2 virus is critical in the course of illness because it results in activation of immune cells leading to elevation of cytokines. The subsequent activation of T cells and macrophages infiltrates the infected myocardial cells causing direct myocardiocyte toxicity and development of arrhythmia. Hypoxia or hypotension during the clinical course causes a mismatch between myocyte oxygen supply and workload demand resulting in cardiac distress. SARS-CoV-2 affects endothelial cells and pericytes that lead to severe micro and macrovascular dysfunction, and together with oxygen supply-demand mismatch, immune hyperresponsivity can potentially cause destabilization and plaque rupture causing acute coronary syndromes. Other mechanisms of injury include myocarditis, pericarditis, stress cardiomyopathy, vasculitis, and DIC (Disseminated intravascular coagulation)/microthrombi. SARS-CoV-2 enters the cells by the Spike protein S whose surface unit, S1, binds to the ACE2 receptor on the host cell. The type II transmembrane serine proteases TMPRSS2 and histone acetyltransferases (HAT) are host cell proteases that are recruited by the virus to cleave ACE2 surface protein S which facilitates the viral entry. Therefore, TMPRSS2 and HAT could be targeted for potential drugs against SARS-CoV-2. SARS-CoV-2 uses an RNA-dependent RNA polymerase for proliferation, which is targeted by remdesivir that is currently approved for emergency use by Food and Drug Administration (FDA). We need to adopt a multifaceted approach when combating SARS-CoV-2 because it presents several challenges including medical, psychological, socioeconomic, and ethical. COVID-19 is the biggest calamity during the 21st century, we need to have a keen understanding of its pathophysiology and clinical implications for the development of preventive measures and therapeutic modalities.

A Rare Case of Acute Pericarditis Due to SARS-CoV-2 Managed With Aspirin and Colchicine.

SARS-CoV-2 infection presents with predominant respiratory illness. Cardiac injury has been reported in patients with SARS-CoV-2 infection. The spectrum of cardiac involvement ranges from pericarditis to myocarditis. Acute pericarditis attributed to SARS-CoV-2 is rare. A 68-year-old male with co-morbid condition of hypertension and arthritis presented with chest tightness, cough and exertional shortness of breath for five days. He was tachycardic at the time of presentation and cardiac auscultation was positive for pericardial rub. His room air oxygen saturation was 95%. Chest imaging studies revealed bilateral infiltrate. His electrocardiogram showed ST elevation with diffusely elevated J point in lead II, III, aVF and V4-V6. Echocardiogram was unrevealing for pericardial effusion and left ventricular ejection fraction was normal. Serial troponin level did not reveal a rising trend. The nasopharyngeal swab was positive for SARS-CoV-2 RNA. Nonsteroidal anti-inflammatory drugs (NSAIDs) use in SARS-CoV-2 positive patient is debatable. The patient had acute pericarditis due to SARS-CoV-2 and it was treated with high dose aspirin with colchicine. Acute pericarditis is a rare complication of SARS-CoV-2 infection and can be managed with aspirin and colchicine.

Digital Ischemia as an Initial Presentation in a COVID-19-Positive Patient Without Any Significant Respiratory Symptoms.

Coronavirus disease 2019 (COVID-19) is an evolving situation worldwide, which is associated with a broad range of symptoms from pneumonia/acute respiratory distress syndrome (ARDS) to multiorgan failure. So far, we have also encountered several patients with coagulopathy, including pulmonary embolism and deep vein thrombosis. A few cases of limb ischemia related to COVID-19 have been reported as well, but most of them involve critically ill patients. In this report, we discuss a case of COVID-19 in a patient who presented with right thumb ischemia without any significant respiratory symptoms.