Post-COVID-19 Arterial Thrombotic Events among Three Major Permutations of COVID-19

Sudhir Bhandari1, Shashank Joshi2, Govind Rankawat3

  • 1Vice Chancellor, RUHS and Professor Emeritus, Department of General Medicine, SMS Medical College, Jaipur, Rajasthan; Corresponding Author.

Insights

The Delta variant of COVID-19 poses a higher risk for post-COVID thrombotic events compared to the Omicron and Alpha variants. Thrombotic event risk correlates with disease severity.

Area of Science:

  • Cardiovascular Research
  • Infectious Diseases
  • Public Health

Background:

  • Post-COVID-19 thrombotic events remain a significant health burden globally.
  • Understanding variant-specific risks for these events is crucial, especially with ongoing SARS-CoV-2 evolution.
  • While vaccination reduces severe COVID-19, residual risks from prior infections persist.

Purpose of the Study:

  • To investigate the incidence and characteristics of post-COVID-19 thrombotic events across different severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants.
  • To compare the risk of thrombotic events following infection with Alpha, Delta, and Omicron variants.
  • To determine the relationship between disease severity, patient demographics, and the development of post-COVID-19 thrombotic events.

Main Methods:

  • A prospective, observational study involving 3,220 COVID-19 patients infected with Alpha, Delta, or Omicron variants.
  • Data collection included demographics, clinical profiles, comorbidities, disease severity, and vaccination status.
  • Patients were followed for six months to identify and analyze post-COVID-19 thrombotic events.

Main Results:

  • Overall, 7.48% of patients developed post-COVID-19 thrombotic events, with the highest incidence in the Delta variant group (14.90%).
  • Coronary artery disease and cerebral vascular disease were the most common thrombotic events observed.
  • The risk of thrombotic events was significantly higher in patients with moderate to severe COVID-19 and varied by variant, with Delta showing the highest risk.

Conclusions:

  • Patients infected with the Delta variant face a greater risk of post-COVID-19 thrombotic events.
  • The Omicron variant presented the lowest risk, while the Alpha variant posed an intermediate risk.
  • The severity of the initial COVID-19 illness is a key factor influencing the likelihood of developing post-COVID-19 thrombotic events.
Abstract

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