“I was in denial, but a part of me always knew this was coming,” said singer David Cassidy of his recent dementia diagnosis.

“While many studies have focused on the risks of high blood pressure, these findings suggest that transient low blood pressure could also have a long term impact on the brain,” says Dr Laura Phipps of Alzheimer’s Research UK.

“This research adds to a growing and complex picture of how blood pressure changes throughout life can impact the brain.”

Dr James Pickett, head of research at the Alzheimer’s Society, added: “Many people experience this form of low blood pressure which can reduce the blood flow to your brain for a short period and result in a dizzy or lightheaded feeling.

“It is not necessarily a cause for concern but people who frequently experience these symptoms should seek advice from their GP. More research is needed to investigate whether treating this kind of low blood pressure would reduce dementia risk.”

Experts agree that the best thing to do, along with seeking consultation regularly for any such dizziness, is to lead a healthy lifestyle that includes a balanced diet, regular exercise and good habits.