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CardiacVaccinationsCoronavirusLong CovidSickness absence management

Unvaccinated at greater risk of death or heart disease following Covid

by Nic Paton 20 Jan 2023
by Nic Paton 20 Jan 2023 Shutterstock
Shutterstock

People who have declined, are unable or have refused to be vaccinated against Covid-19 retain a greater risk of death and cardiovascular disease for at least 18 months after being infected with the virus, research has suggested.

Covid-19 is associated with higher risks of cardiovascular disease and death in the short- and long-term, according to the study of nearly 160,000 people published in Cardiovascular Research, a journal of the European Society of Cardiology.

Compared to uninfected individuals, the likelihood of Covid-19 patients dying was up to 81 times higher in the first three weeks of infection and remained five times higher up to 18 months later, it concluded.

“Covid-19 patients were more likely to develop numerous cardiovascular conditions compared to uninfected participants, which may have contributed to their higher risks of death,” said study author Professor Ian C K Wong of the University of Hong Kong.

“The findings indicate that patients with Covid-19 should be monitored for at least a year after recovering from the acute illness to diagnose cardiovascular complications of the infection, which form part of long Covid,” he added.

This study compared the occurrence of cardiovascular conditions and death in infected versus uninfected individuals recruited before December 2020, when no vaccines were available in the UK.

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More than 7,500 patients with the virus were diagnosed from 16 March 2020 to 30 November 2020. Each patient was matched with up to 10 individuals without Covid-19 during the study period (16 March 2020 to the end of follow-up on 31 August 2021) and a historical cohort before the pandemic (16 March 2018 to 30 November 2018).

Each uninfected group had more than 70,000 participants who were similar to the Covid-19 group for age, sex, smoking, diabetes, high blood pressure, cardiovascular and other health conditions, body mass index, ethnicity, and deprivation. In all three groups, the average age was 66 years and there were nearly equal numbers of women and men.

Professor Wong explained: “The historical control cohort was included to rule out the effect of routine healthcare services being reduced or cancelled during the pandemic, which led to worsening health and increased mortality even in uninfected people.”

Compared with the two uninfected cohorts, patients with Covid-19 were approximately four times more likely to develop major cardiovascular disease in the acute phase and 40% more likely in the post-acute phase, the study concluded.

Compared to uninfected individuals, the risk of death in Covid-19 patients was up to 81-fold higher in the acute phase and five-fold higher in the post-acute phase. Patients with severe Covid-19 were more likely to develop major cardiovascular disease or die than non-severe cases.

Covid-19 patients had a greater likelihood of several cardiovascular conditions compared with uninfected participants in both the short- and long-term including myocardial infarction, coronary heart disease, heart failure, and deep vein thrombosis.

Risks of some cardiovascular conditions – for example stroke and atrial fibrillation – were elevated in Covid-19 patients in the short-term but then returned to normal levels.

Professor Wong said: “This study was conducted during the first wave of the pandemic, and future research should evaluate subsequent outbreaks. Previous research has indicated that Covid-19 vaccination may prevent complications, and further studies are needed to investigate its effectiveness in reducing the risks of cardiovascular disease and death after Covid-19 infection in patients with Covid-19 vaccination compared to those without vaccination.”

European Society of Cardiology spokesperson Professor Héctor Bueno, of the National Centre for Cardiovascular Research in Madrid, said: “Covid-19 has had a huge impact on patients with cardiovascular disease, who were less likely to receive optimal care during the pandemic and more likely to die from the infection.

“This study shows that Covid-19 also increases the risk of having cardiovascular complications and dying in the first weeks after the infection and remains high for months, suggesting that specific cardiovascular monitoring may be appropriate in these patients.”

Nic Paton
Nic Paton

Nic Paton is consulting editor of OHW+. One of the country's foremost workplace health journalists, Nic has written for OHW+ and Occupational Health & Wellbeing since 2001, and edited the magazine from 2018.

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