Three Vessel Disease with Left Main Involvement: A Rare Manifestation of Takayasu’s Arteritis

Background: Takayasu’s arteritis is a chronic vasculitis of unknown etiology affecting large vessels. Coronary involvement is rare and myocardial infarction as a presenting symptom has only been described in case reports. Case: We report a case of a 19 year old female diagnosed with Takayasu’s arteritis 2 years prior who came in due to chest pain and heart failure symptoms. ECG showed diffuse ischemia with ST elevation of the inferior wall. Coronary angiogram showed 3 vessel disease with left main involvement. Patient was started on high dose steroids. She then developed an acute stroke in the right posterior cerebral artery territory. She improved with Methylprednisolone pulse therapy and oral methotrexate. She was discharged on Prednisone, Methotrexate and cardiac medications and is stable on follow up. Diagnostics: Coronary angiogram showed ostioproximal stenosis of the distal left main segment, the proximal left anterior descending artery and the proximal left circumflex artery, with the right coronary artery being totally occluded. Two dimensional echocardiogram showed an ejection fraction of 38 percent with multisegmental wall motion abnormalities. CT aortogram showed segmental narrowing of the infrarenal abdominal aorta with multiple ostioproximal stenosis of several aortic branches with extensive collateral formation. MRI showed acute infarction in the right thalamus,right medial temporal and occipital lobes and right cerebellar hemisphere and vermis Conclusion: Takayasu’s arteritis can present with a myriad of vascular complications. The reported incidence of coronary involvement is low. This case highlights the progressive and unpredictable nature of this disease. A high index of clinical suspicion, as well as a meticulous search for the extent of disease severity allows the clinician to individualize treatment options for these patient

Genomic reconstruction of the SARS-CoV-2 epidemic in England

AbstractThe evolution of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus leads to new variants that warrant timely epidemiological characterization. Here we use the dense genomic surveillance data generated by the COVID-19 Genomics UK Consortium to reconstruct the dynamics of 71 different lineages in each of 315 English local authorities between September 2020 and June 2021. This analysis reveals a series of subepidemics that peaked in early autumn 2020, followed by a jump in transmissibility of the B.1.1.7/Alpha lineage. The Alpha variant grew when other lineages declined during the second national lockdown and regionally tiered restrictions between November and December 2020. A third more stringent national lockdown suppressed the Alpha variant and eliminated nearly all other lineages in early 2021. Yet a series of variants (most of which contained the spike E484K mutation) defied these trends and persisted at moderately increasing proportions. However, by accounting for sustained introductions, we found that the transmissibility of these variants is unlikely to have exceeded the transmissibility of the Alpha variant. Finally, B.1.617.2/Delta was repeatedly introduced in England and grew rapidly in early summer 2021, constituting approximately 98% of sampled SARS-CoV-2 genomes on 26 June 2021.</jats:p