The study, published in European Heart Journal on Monday, analyzed evidence from several thousand patients.
Study shows men have a higher concentration of angiotensin-converting enzyme 2 (ACE2) in their blood than women.
Since ACE2 enabled the coronavirus to infect helathy cells. researchers propose this may help explain why men are more vulnerable to Covid-19 than women.
The study also found that heart failure patients taking drugs targeting the renin-angiotensin-aldosterone system (RAAS), such as angiotensin-converting enzyme (ACE) inhibitors or angiotensin receptor blockers (ARBs), did not have higher concentrations of ACE2 in their blood.