Role of antibodies, inflammatory markers, and echocardiographic findings in post-acute cardiopulmonary symptoms after SARS-CoV-2 infection
Authors: Durstenfeld Matthew S. , Peluso Michael J. , Kelly J. Daniel , Win Sithu , Swaminathan Shreya , Li Danny , Arechiga Victor M. , Zepeda Victor , Sun Kaiwen , Shao Shirley , Hill Christopher , Arreguin Mireya I. , Lu Scott , Hoh Rebecca , Tai Viva , Chenna Ahmed , Yee Brandon C. , Winslow John W. , Petropoulos Christos J. , Kornak John , Henrich Timothy J. , Martin Jeffrey N. , Deeks Steven G. , Hsue Priscilla Y. 
Published: November 2021

ABSTRACTBACKGROUNDShortness of breath, chest pain, and palpitations occur as post-acute sequelae of COVID-19 (PASC), but whether symptoms are associated with echocardiographic abnormalities, cardiac biomarkers, or markers of systemic inflammation remains unknown.METHODSIn a cross-sectional analysis, we assessed symptoms, performed echocardiograms, and measured biomarkers among adults >8 weeks after PCR-confirmed SARS-CoV-2 infection. We modeled associations between symptoms and baseline characteristics, echocardiographic findings, and biomarkers using logistic regression.RESULTSWe enrolled 102 participants at a median 7.2 months (IQR 4.1-9.1) following COVID-19 onset; 47 individuals reported dyspnea, chest pain, or palpitations. Median age was 52 years (range 24-86) and 41% were women. Female sex (OR 2.55, 95%CI 1.13-5.74) and hospitalization during acute infection (OR 3.25, 95%CI 1.08-9.82) were associated with symptoms. IgG antibody to SARS-CoV-2 receptor binding domain (OR 1.38 per doubling, 95%CI 1.38-1.84) and high-sensitivity C-reactive protein (OR 1.31 per doubling, 95%CI 1.00-1.71) were associated with symptoms. Regarding echocardiographic findings, 4/47 (9%) with symptoms had pericardial effusions compared to 0/55 without symptoms (p=0.038); those with pericardial effusions had a median 4 symptoms compared to 1 without (p<0.001). There was no strong evidence for a relationship between symptoms and echocardiographic functional parameters (including left ventricular ejection fraction and strain, right ventricular strain, pulmonary artery pressure) or high-sensitivity troponin, NT-pro-BNP, interleukin-10, interferon-gamma, or tumor necrosis factor-alpha.CONCLUSIONSAmong adults in the post-acute phase of SARS-CoV-2 infection, SARS-CoV-2 RBD antibodies, markers of inflammation and, possibly, pericardial effusions are associated with cardiopulmonary symptoms. Investigation into inflammation as a mechanism underlying PASC is warranted.FUNDINGThis work was supported by the UCSF Division of Cardiology at Zuckerberg San Francisco General, and the National Institutes of Health/National Heart Lung Blood Institute and National Institute of Allergy and Infectious Diseases. MSD is supported by NIH 5K12HL143961. MJP is supported on NIH T32 AI60530-12. JDK is supported by NIH K23AI135037. TJH is supported by NIH/NIAID 3R01A1141003-03S1. PYH is supported by NIH/NAID 2K24AI112393-06. This publication was supported by the National Center for Advancing Translational Sciences, National Institutes of Health, through UCSF-CTSI Grant Number UL1TR001872. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the NIH.GRAPHICAL ABSTRACT