Covid may trigger high blood pressure, new research suggests

More than 45,000 hospital patients who were infected with the virus were studied as part of the research.

The study found a "significant association" between Covid-19 and the development of persistent high blood pressure among those with no previous history of the condition.

Participants with Covid and no history of high blood pressure were also much more likely to develop persistent high blood pressure compared to people with the flu virus.

People with Covid and no history of high blood pressure were also much more likely to develop persistent high blood pressure compared to people with the flu virus. ( SWNS) (Image: SWNS)

People with Covid-19 who are over age 40, men, black adults or those with pre-existing conditions - such as chronic obstructive pulmonary disease (COPD), coronary artery disease or chronic kidney disease, all had an elevated risk of developing high blood pressure, according to the findings published in the journal Hypertension.

Senior author Professor Tim Duong, of Albert Einstein College of Medicine and Montefiore Health System in New York City, explained that the study was the first to investigate the development and risk factors associated with persistent high blood pressure in people infected with Covid compared to influenza, a similar respiratory virus.

Prof Duong said: “While Covid-19 is typically more severe in patients with pre-existing high blood pressure, including higher rates of hospitalisation and mortality compared to people with normal blood pressure, it is unknown whether the SARS-CoV-2 virus may trigger the development of high blood pressure or worsen pre-existing hypertension."

What is high blood pressure?

High blood pressure, also known as hypertension, is classified as having top and bottom numbers greater than or equal to 130/80 mm Hg. ( SWNS) (Image: SWNS)

High blood pressure, also known as hypertension, is classified as having top and bottom numbers greater than or equal to 130/80 mm Hg.

Your high pressure changes throughout the day depending on what you’re doing.

However,  consistently high blood pressure can lead to a hypertension diagnosis and an increased risk of other health problems, such as heart disease, heart attack, and stroke.

For further guidance and support, visit the NHS website.

Researchers analysed health data from electronic medical records at the Montefiore Health System in Bronx, New York, which serves a large, racially and ethnically diverse population.

The study included 45,398 people with Covid-19 - hospitalised between March 2020 and February 2022 - and 13,864 people with flu but not Covid - hospitalised between January 2018 and February last year- who returned to the hospital system for any medical reasons.

21% of people hospitalised with Covid and 11% of those who were not hospitalised for Covid developed high blood pressure, compared to 16% of people hospitalised with flu and 4% of those not hospitalised for flu.

Participants with Covid and no history of high blood pressure were also much more likely to develop persistent high blood pressure compared to people with the flu virus. ( SWNS) (Image: SWNS)

People hospitalised for Covid were more than twice as likely and those not hospitalised were 1.5 times more likely to develop persistent hypertension compared to people with flu.

People infected with SARS-CoV-2 who were over 40 years old, black adults or those with pre-existing conditions all had an elevated risk of developing high blood pressure.

Prof Duong said: “Given the sheer number of people affected by Covid-19 compared to influenza, these statistics are alarming and suggest that many more patients will likely develop high blood pressure in the future, which may present a major public health burden."

He added: “These findings should heighten awareness to screen at-risk patients for hypertension after Covid-19 illness to enable earlier identification and treatment for hypertension-related complications, such as cardiovascular and kidney disease.”