Scientists from The University of Hong Kong found that COVID-19 vaccination is not linked to an increased risk of heart attack or stroke in people with heart disease.
The pre-existing cardiovascular disease should not prevent people from getting vaccinated against COVID-19.
The research is published in Cardiovascular Research and was conducted by Dr. Esther W. Chan et al.
This was the first study to examine the association between COVID-19 vaccines and the risk of major heart events in people with heart disease.
The study focused on BNT162b2 and CoronaVac, the only COVID-19 vaccines authorized for emergency use in Hong Kong.
The researchers linked data from electronic health records managed by the Hong Kong Hospital Authority, which covers around 80% of hospital admissions, and vaccination records provided by the Hong Kong Department of Health.
A total of 229,235 patients with heart disease were identified, of which 1,764 were vaccinated and experienced heart events during the study period.
There was no evidence of a higher risk of heart events after the first or second dose of BNT162b2 or CoronaVac.
The findings were consistent for women and men, people aged under and above 65 years old, and people with different underlying heart conditions.
The results should provide reassurance about the cardiovascular safety of these two vaccines.
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