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• W4377107802 abstract "This report describes a case of probable myocarditis following bivalent COVID-19 vaccination. Although this was the patient’s fifth COVID-19 vaccination, it was the first dose of bivalent vaccine. The myocarditis may have been due to direct damage caused by an increase in free spike protein. This case demonstrates that post-vaccination hypercytokinemia may cause myocarditis, leading to potentially fatal arrhythmia. Colchicine, which suppresses hypercytokinemia, may be effective in such cases and preferable to steroids, particularly in elderly patients. This adverse reaction is difficult to diagnose using conventional methods, and multimodality diagnostics are important, including myocardial scintigraphy and cardiac magnetic resonance imaging. The patient was an 81-year-old man who had first been admitted to our hospital for heart failure 9 years earlier due to diffuse left ventricular dysfunction (ejection fraction 30%). Coronary angiography revealed severe stenosis in the left circumflex branch #11, which was treated by percutaneous coronary intervention. Subsequent fatty acid analog iodine-123 beta-methyliodophenyl-pentadecanoic acid and thallium-201 resting myocardial scintigraphy showed no evidence of ischemia or infarction. Hypertensive heart disease was suspected due to a long history of hypertension. Holter monitoring showed a maximum of 12 beats of premature ventricular contractions from multiple origins but no sustained ventricular tachycardia (VT). In view of the patient’s wishes and financial considerations, an implantable cardioverter defibrillator (ICD) for primary prevention was not placed. A year and a half earlier, 1 month after his first COVID-19 vaccination, he had been readmitted to hospital for heart failure and underwent coronary angiography, which showed no significant stenosis. Two weeks before his fifth COVID-19 vaccination, no worsening of his heart failure was detected at our regular outpatient clinic. However, on the day following bivalent BNT162b2 (wild and BA.4-5) vaccination (Pfizer–BioNTech), he was rushed to our hospital with dyspnea. When he entered the emergency room, he had cold extremities, a heart rate of 207 beats/min, a systolic blood pressure of 74 mmHg, and percutaneous oxygen saturation of 94% on room air. Arterial blood gas analysis showed pH 6.99, PaO2 56.6 mmHg, PaCO2 37.3 mmHg, HCO3- 13.8 mEq/L, and lactate 12.2 mmol/L, indicating metabolic acidosis suggestive of cardiogenic shock. An electrocardiogram revealed left bundle branch block and right axis deviation with sustained VT originating from the right ventricular outflow tract (Figure 1a); this morphology of VT had not been seen on previous Holter monitoring. Pulseless electrical activity was seen after one cycle of synchronized electrical cardioversion, with return of spontaneous circulation after one cycle of cardiopulmonary resuscitation, including adrenaline administration and tracheal intubation with chest compressions by the emergency physician. He was admitted to the cardiology department and placed in the intensive care unit for systemic management. At this time, the electrocardiogram revealed new-onset right bundle branch block and ST-segment depression in leads V4–6 (Figure 1b). Echocardiography revealed no change in left ventricular dysfunction and no thinning of the basal septum. A chest radiograph and computed tomography (CT) scans showed bilateral pleural effusions but no evidence of hilar lymphadenopathy, infection, or trauma on either side. Laboratory tests showed elevated levels of high-sensitivity troponin I (0.029 ng/mL; normal <0.026 ng/mL) and new-onset liver dysfunction (aspartate transaminase 189 U/L, alanine transaminase 102 U/L). C-reactive protein (0.22–1.51 mg/dL) and brain natriuretic peptide (292.8–1066.7 pg/mL) levels were also elevated in comparison with the outpatient laboratory test values. Cultures, COVID-19 polymerase chain reaction tests, and various viral antibody titers were negative. Collagen-related antibody titers, tumor markers, the free light chain κ/λ ratio, alpha-galactosidase A and angiotensin-converting enzyme activity, and the soluble interleukin (IL)-2 receptor level were normal. The VT was managed with amiodarone and his regular dose of β-blocker (carvedilol 7.5 mg/day). He was weaned from the ventilator on day 2, but there was little improvement in his congestive heart failure. On day 3, he developed chest pain and non-sustained VT with continued elevation of high-sensitivity troponin I (0.401 ng/mL) and C-reactive protein (14.63 mg/dL) levels. He was also noted to have hypercytokinemia, with an elevated IL-6 level (95.7 pg/mL; normal <7 pg/mL). Given that new electrocardiographic changes had been seen on admission, we suspected myocarditis and administered colchicine 0.5 mg/day. An electrocardiogram obtained on day 4 showed that the right bundle branch block and ST-segment depression seen on admission had improved (Figure 1b). Thereafter, his condition improved and the high-sensitivity troponin I, C-reactive protein, and IL-6 levels decreased (to 0.025 ng/mL, 0.07 mg/dL, and 3.5 pg/mL, respectively, on day 26; Figure 2). On day 13, repeat CT showed no inflammatory source and resolution of pleural effusion. On day 17, uptake of technetium-99m was decreased from the basal to the mid-inferolateral regions in comparison with that of the fatty acid analog 123I-BMIPP on myocardial scintigraphy scans obtained 9 years earlier, which suggested myocardial injury (Figure 1c and 1d). Coronary angiography showed no stenosis on day 18 and a right ventricular endocardial biopsy revealed only mild fibrosis. Cardiac magnetic resonance imaging (CMR) performed on day 19 after the patient’s renal function had recovered to a level amenable to use of gadolinium contrast showed late gadolinium enhancement (LGE) in the mid layer of the anterior septum, suggestive of pre-existing cardiomyopathy. However, the LGE and high signal on T2-weighted images in the inferolateral segments of the epicardial to mid layers suggested nonischemic heart disease (Figure 1e and 1f). These findings were considered compatible with myocarditis because they met the Lake Louise consensus criteria (2/3 positive).1Basso C. Myocarditis. Longo DL, ed. N Engl J Med. 2022;387(16):1488-1500. https://doi:10.1056/NEJMRA2114478.Google Scholar Considering that laboratory test results, chest CT, and echocardiography showed no features consistent with Fabry disease or cardiac sarcoidosis, we diagnosed this as a case of probable myocarditis due to COVID-19 vaccination. The patient was discharged home on day 31 after ICD implantation, and colchicine was discontinued. Two months later, his condition was stable, and echocardiography showed no septal thinning or new-onset left ventricular dysfunction. This patient was elderly and the time to onset of myocarditis after vaccination (1 day) was slightly shorter than in a previous report suggesting a median of 2–3 days and that myocardial infarction occurs on the day of vaccination or the following day.2Aye YN, Mai AS, Zhang A, et al. Acute myocardial infarction and myocarditis following COVID-19 vaccination. QJM: An International Journal of Medicine. Published online September 29, 2021. https://doi:10.1093/QJMED/HCAB252.Google Scholar It has also been reported that myocarditis is more common in younger patients and myocardial infarction is more common in elderly patients.2Aye YN, Mai AS, Zhang A, et al. Acute myocardial infarction and myocarditis following COVID-19 vaccination. QJM: An International Journal of Medicine. Published online September 29, 2021. https://doi:10.1093/QJMED/HCAB252.Google Scholar Chest pain that develops in an elderly individual within a short time after vaccination may indicate onset of myocardial infarction, which is an important differential disease. Our patient also developed congestive heart failure with VT before onset of chest pain, which is consistent with a previous report of ventricular arrhythmia occurring as the first manifestation of myocarditis.1Basso C. Myocarditis. Longo DL, ed. N Engl J Med. 2022;387(16):1488-1500. https://doi:10.1056/NEJMRA2114478.Google Scholar This report indicates the need to suspect myocarditis based on clinical presentation and the importance of multimodality diagnosis using electrocardiography, echocardiography, laboratory testing, myocardial scintigraphy, and CMR.1Basso C. Myocarditis. Longo DL, ed. N Engl J Med. 2022;387(16):1488-1500. https://doi:10.1056/NEJMRA2114478.Google Scholar In our case, CMR showed LGE in the inferolateral segments of the epicardial to mid layers, which has been reported to be a characteristic finding in patient with mRNA vaccine-associated myocarditis.3Crosier R. Kafil T.S. Paterson D.I. Imaging For Cardiovascular Complications of COVID-19: Cardiac Manifestations in Context.Can J Cardiol. Published online January. 2023; 30https://doi:10.1016/J.CJCA.2023.01.022Google Scholar Endocardial biopsy is the gold standard for detecting myocarditis but is invasive and thought to have less sensitivity in disorders resulting from epicardial and patchy diseases such as myocarditis.3Crosier R. Kafil T.S. Paterson D.I. Imaging For Cardiovascular Complications of COVID-19: Cardiac Manifestations in Context.Can J Cardiol. Published online January. 2023; 30https://doi:10.1016/J.CJCA.2023.01.022Google Scholar On the other hand, CMR is considered to be the cornerstone for diagnosis of vaccine-associated myocarditis due to its high diagnostic performance,3Crosier R. Kafil T.S. Paterson D.I. Imaging For Cardiovascular Complications of COVID-19: Cardiac Manifestations in Context.Can J Cardiol. Published online January. 2023; 30https://doi:10.1016/J.CJCA.2023.01.022Google Scholar with a reported sensitivity of 88% and specificity of 96% in community-acquired myocarditis.1Basso C. Myocarditis. Longo DL, ed. N Engl J Med. 2022;387(16):1488-1500. https://doi:10.1056/NEJMRA2114478.Google Scholar,3Crosier R. Kafil T.S. Paterson D.I. Imaging For Cardiovascular Complications of COVID-19: Cardiac Manifestations in Context.Can J Cardiol. Published online January. 2023; 30https://doi:10.1016/J.CJCA.2023.01.022Google Scholar The COVID-19 vaccine is thought to cause myocarditis via direct damage by free spike protein4Yonker LM, Swank Z, Bartsch YC, et al. Circulating Spike Protein Detected in Post-COVID-19 mRNA Vaccine Myocarditis. Circulation Jan 4, 2023. Online ahead of print. https://doi.org/10.1161/CIRCULATIONAHA.122.061025.Google Scholar and induction of inflammatory cytokines (e.g., IL-1β and IL-6) by the lipid nanoparticles covering the mRNA.5Tahtinen S. Tong A.J. Himmels P. et al.IL-1 and IL-1ra are key regulators of the inflammatory response to RNA vaccines.Nat Immunol. 2022; 23: 532-542Crossref PubMed Scopus (52) Google Scholar Expression of free spike protein may increase after the initial bivalent vaccination because antibodies against the spike protein of the BA.4-5 variant are yet to be generated. In autopsy cases, histology has shown patchy interstitial myocardial T-lymphocytic infiltration (T-cell dominant; CD4>>CD8) associated with damage to myocytes.6Schwab C, Domke LM, Hartmann L, et al. Autopsy-based histopathological characterization of myocarditis after anti-SARS-CoV-2-vaccination. Clin Res Cardiol. 2023 Mar;112(3):431-440. https://doi: 10.1007/s00392-022-02129-5.Google Scholar Molecular mimicry between myocyte tissue and the SARS-COV2 spike protein may also produce an anti-myocytic immune response.6Schwab C, Domke LM, Hartmann L, et al. Autopsy-based histopathological characterization of myocarditis after anti-SARS-CoV-2-vaccination. Clin Res Cardiol. 2023 Mar;112(3):431-440. https://doi: 10.1007/s00392-022-02129-5.Google Scholar Therefore, T lymphocyte-mediated cell injury and heart-specific autoimmunity have been suggested as mechanisms of post-vaccine myocarditis.6Schwab C, Domke LM, Hartmann L, et al. Autopsy-based histopathological characterization of myocarditis after anti-SARS-CoV-2-vaccination. Clin Res Cardiol. 2023 Mar;112(3):431-440. https://doi: 10.1007/s00392-022-02129-5.Google Scholar Given that VT originating from the right ventricular outflow tract often develops via the sympathetic nervous system, β-blockers are the first-line treatment. This morphology of VT was not seen on previous Holter monitoring, suggesting that it may have been influenced not only by the left ventricular substrate as confirmed by CMR but also by autonomic abnormalities caused by hypercytokinemia. Colchicine may be an effective treatment for post-COVID-19 vaccine-associated myocarditis because it reduces susceptibility to ventricular arrhythmias by suppressing inflammation via inhibition of IL-1β, which induces IL-6.7Lv Z. Chen X. Chen P. et al.Colchicine prevents ventricular arrhythmias vulnerability in diet-induced obesity rats.Biochem Biophys Res Commun. 2022; 610: 127-132Crossref PubMed Scopus (0) Google Scholar There is a reluctance to use steroids to treat elderly patients with poor cardiac function, and colchicine may be a safer alternative without cardiovascular effects. In conclusion, we propose that myocarditis after COVID-19 vaccination is difficult to diagnose and may present as a potentially fatal condition causing cardiac arrest, as in this case of poor cardiac function in which an ICD was indicated. Clinicians should be aware of the possibility of changes in a patient’s cardiovascular status after COVID-19 vaccination and the need for early diagnosis and treatment to avoid a severe adverse reaction. •Hypercytokinemia after COVID-19 vaccination may cause myocarditis, leading to potentially fatal arrhythmia.•Colchicine may be an effective treatment for post-COVID-19 vaccine-associated myocarditis.•Multimodality diagnostics are important for detecting myocarditis after COVID-19 vaccination.•Clinicians should be aware of the possibility of changes in a patient’s cardiovascular status after COVID-19 vaccination. No funding was provided for this article." @default.
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• W4377107802 title "Myocarditis With Ventricular Tachycardia Following Bivalent COVID-19 mRNA Vaccination" @default.
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