Postural Orthostatic Tachycardia Syndrome and Orthostatic Hypotension Post COVID-19.

Background: Novel coronavirus causes coronavirus disease -19 (COVID-19). The hallmark is acute respiratory distress syndrome, but other systems' involvement is less illustrated. Our goal was to evaluate the manifestation of COVID-19 on one of the overlaps of the cardiovascular and nervous system, namely: Postural Orthostatic Tachycardia Syndrome (POTS) and Orthostatic Hypotension (OH).
Methods: This single-center cross-sectional observational study encompassed 60 consecutive patients that were hospitalized and recovered from severe or critical COVID-19. At the time of discharge, Blood Pressure (BP) and Heart Rate (HR) in the supine and upright position (1st, 3rd, 5th and 10th minutes) were measured. Symptomatic patients were reevaluated 2 months later.
Results: The mean age of patients was 56.6 (± 16.2) years and 42 patients were male (70%). The most frequent cardiovascular risk factor was hypertension (35%). OH and POTS were detected in 29(48.3%) and 10(16.7%) patients, respectively, at the time of hospital discharge. The mean age of patients with OH was higher than POTS and POTS was frequent in the elderly. Two months later, among 10 patients with POTS, the sign and symptoms were resolved in 8(80%). Two (20%) patients who still had positive signs and symptoms of POTS were older than 65 years. Among 29 patients with OH, the signs and symptoms were resolved in 26 (89.7%).
Conclusion: In our study, 65% of patients had OH or POTs on the day of hospital discharge; complete recovery is gradual and needs several additional weeks. This is one of the aspects of the entity recently named "Long COVID".
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