ABSTRACT
Background: The infection caused by the SARS-CoV-2 continues affecting millions of people worldwide and vaccines to prevent the coronavirus disease (COVID-19) are considered the most promising approach for curbing the pandemic. Otherwise, cardiovascular and neurological complications associated with the vaccines were speculated and some few case reports were published. Objective(s): We describe a case of postural orthostatic tachycardia syndrome (POTS) after viral vector COVID-19 vaccination and the possible autoimmune process of the syndrome. Method(s): A 35-year-old female, without previous symptoms or comorbidities, developed intermittent palpitation, intense fatigue and dyspnea, compromising her daily activities, triggered by upright position, seven days following the second dose of the Oxford vaccine. Physical examination was normal, except for a heart rate (HR) increase of 33 beats/min from supine to standing position, with no significant change in blood pressure and reproduction of symptoms. Result(s): A 24-hour Holter monitoring revealed episodes of spontaneous sinus tachycardia correlated with palpitation and fatigue. Extensive diagnostic investigations excluded primary cardiac, endocrine, infectious and rheumatologic etiologies. The patient underwent an autonomic function test which demonstrated normal baroreflex sensitivity, as well as normal cardiovagal and adrenergic scores. Head-up tilt test showed persistent orthostatic tachycardia (HR increase from a medium of 84 beats/min in supine position to 126 beats/min during upright tilt), without hypotension, consistent with the diagnostic criteria for POTS. According to the current guidelines, general behavior recommendations, pharmacotherapy with low dose of propranolol associated with the autonomic rehabilitation were oriented. Along three months of follow-up, the patient reported a gradually improvement in her symptoms. Conclusion(s): POTS is a heterogeneous disorder of the autonomic nervous system characterized by orthostatic tachycardia associated with symptoms of orthostatic intolerance. Although the physiopathology of COVID-19 vaccine and autonomic disorders remains speculative, autoimmune response is one of the possible mechanisms. Based on clinic presentation, the time frame of symptom onset is consistent with other well-known post-vaccination syndromes, which may be an indicator of an autoimmune process induced by immunization. Further studies are needed to assess causal relationship between immunization and autonomic dysfunction.Copyright © 2023
ABSTRACT
SESSION TITLE: Cardiovascular Critical Care Cases SESSION TYPE: Rapid Fire Case Reports PRESENTED ON: 10/19/2022 12:45 pm - 1:45 pm INTRODUCTION: The carotid sinus-arterial baroreflex is essential in maintaining blood pressure (BP) regulation. Afferent baroreflex failure (ABF) can present with labile changes in BP within seconds and can be secondary to neck surgery or radiation (RT). The prevalence and etiology of this condition remain unknown, and management of BP can be challenging. We present here the first case, to our knowledge, of ABF precipitated by thyroidectomy, in a patient (pt) with active COVID-19 pneumonia (PNA), causing difficult control of severely labile BP in a critical care unit. CASE PRESENTATION: A 74-year-old female with a history of COPD and a thyroid mass s/p an open left hemithyroidectomy & isthmusectomy, partial right thyroidectomy with drain placement who presented with dyspnea and hypoxia with COVID-19 PNA and superimposed bacterial PNA. She was immediately intubated and admitted to the ICU. Due to improved alertness and breathing, an extubation trial was done on day 2 but was unsuccessful due to a neck mass compressing the trachea, and during extubation, the pt began to develop stridor, desaturate, and was reintubated. CT head and neck showed a markedly enlarged thyroid with left tracheal deviation and the pt underwent complete thyroidectomy the following day. On the 4th day following surgery, the pt desaturated on PRVC and CXR showed new consolidation, and the PNA panel was positive for K. pneumoniae. The pt's BP began to fluctuate from the 80's/40's - 260's/190's. Titrating pressors were not effective in controlling her volatile BP. Clonidine was started to control hypertensive urgencies, but severe subsequent hypotensive episodes made it difficult to continue. A trial of Fentanyl drip did not add a benefit either. Adequate BP control was finally achieved through administering Clonidine only when SBP reached above 180mmHg and Midodrine when SBP reached below 80mmHg. DISCUSSION: Blood pressure changes can be sensed by carotid sinus stretch receptors. ABF can manifest secondary to carotid sinus nerve damage following neck surgery or radiation. The diagnosis of ABF remains ill-defined;with limited research available to guide definitive management. Critically ill patients with poor prognosis have demonstrated higher ACTH levels with a longer cortisol release, with elevated IL-8 and IL-6 concentrations, concluding potential destructive pituitary-adrenal axis response in the setting of inflammation. IL-6 in particular can manifest following hypoxic conditions. In certain cases of POTS and AD in COVID-19, there has been an improvement of symptoms with the use of B-blockers, fludrocortisone, midodrine, methyldopa, and clonidine. CONCLUSIONS: Additional research with a multidisciplinary approach is warranted to fully optimize the treatment of ABF in patients with neck surgery and or inflammatory conditions such as COVID-19. Reference #1: Biaggioni I, Shibao CA, Jordan J. Evaluation and Diagnosis of Afferent Baroreflex Failure. Hypertension. 2022 Jan;79(1):57-9. Reference #2: Dimopoulou I, Alevizopoulou P, Dafni U, Orfanos S, Livaditi O, Tzanela M, Kotanidou A, Souvatzoglou E, Kopterides P, Mavrou I, Thalassinos N. Pituitary-adrenal responses to human corticotropin-releasing hormone in critically ill patients. Intensive care medicine. 2007 Mar;33(3):454-9. Reference #3: Dani M, Dirksen A, Taraborrelli P, Torocastro M, Panagopoulos D, Sutton R, Lim PB. Autonomic dysfunction in 'long COVID': rationale, physiology and management strategies. Clinical Medicine. 2021 Jan;21(1):e63. DISCLOSURES: No relevant relationships by Wadah Akroush No relevant relationships by Shady Geris No relevant relationships by Brooke Kania No relevant relationships by Anas Mahmoud No relevant relationships by Rajapriya Manickam