In a recent study, researchers have explored silent covert strokes that are common than overt strokes in people aged around 65 and have undergone surgery.The study was published in the journal, 'The Lancet'.While an overt stroke causes symptoms such as weakness in one arm or speech problems that last more than a day, a covert stroke is not obvious except on brain scans, such as MRI.According to researchers, each year, approximately 0.5 per cent of the 50 million people aged 65 years or older worldwide who have major, non-cardiac surgery will suffer an overt stroke, but until now little was known about the incidence or impacts of silent stroke after surgery.Dr PJ Devereaux, co-principal investigator of the NeuroVISION study said, "We've found that 'silent' covert strokes are actually more common than overt strokes in people aged 65 or older who have surgery."The principal investigator along with his team found that one in 14 people over age 65 who had elective, non-cardiac surgery had .
