How middle-age hypertension raises dementia risk later
London, June 13: A high blood pressure level but still below the usual threshold for treating hypertension can put 50-year-olds at increased risk of developing dementia later, revealed a study led by an Indian-origin researcher.
According to the American Heart Association, normal blood pressure is below 120/80 mmHg.
People with a systolic blood pressure (the top number) of 130 mmHg or more at the age of 50 had a 45 per cent greater risk of developing dementia than those with a lower level at the same age.
The risk was 47 per cent even in people with no heart or blood vessel-related conditions.
"Our work confirms the detrimental effects of midlife hypertension for risk of dementia," said lead author Archana Singh-Manoux, Professor at the French National Institute of Health and Medical Research (INSERM) in Paris.
The reason for the increased risk of dementia includes the fact that high blood pressure is linked to silent or mini strokes (where symptoms often are not noticeable), damage to the white matter in the brain, which contains many of the brain's nerve fibres, and restricted blood supply to the brain.
This damage may underlie the resulting decline in the brain's processes, the researchers explained in the study of nearly 9,000 people, published in the European Heart Journal.
However, the association was not seen at the ages of 60 and 70, and diastolic blood pressure (the bottom number) was not linked to dementia.
"Our analysis suggests that the importance of mid-life hypertension on brain health is due to the duration of exposure," the researcher said.
"So we see an increased risk for people with raised blood pressure at age 50, but not 60 or 70, because those with hypertension at age 50 are likely to be 'exposed' to this risk for longer," she added.
Another study reported in the journal Cardiovascular Research showed that higher risk of developing dementia in hypertensive patients occurs due to significant alterations in three specific white matter fibre-tracts linked to executive functions, processing speed, memory and related learning tasks -- brain areas associated with dementia.
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MP: 7-year-old girl raped and murdered; minor relative detained
Barwani (MP), Jan 28 (PTI) Police on Wednesday detained a 17-year-old relative of a seven-year-old girl in Barwani district of Madhya Pradesh for allegedly raping her and killing her by throwing her into a canal, a police official said.
Superintendent of Police Jagdish Dawar told reporters that the body of the child was recovered from the Indira Sagar Canal on January 26, following information from residents of a village in the Rajpur police station area of the district.
He said the post-mortem report concluded severe injuries to the girl’s private parts and attributed her death to drowning.
Dawar said a 17-year-old boy, a close relative of the girl, has been detained in connection with the rape-murder.
The teenager told the police that he kidnapped the girl from her home on the night of January 25 while her family members were asleep, took her to a nearby canal and raped her, according to the official.
When the girl started screaming during the sexual assault, the minor boy allegedly threw her into the canal, with the intention of killing her. The child drowned in the water body, the official said.
The detained minor will be produced in a juvenile court.
A case has been registered under the Protection of Children from Sexual Offences Act and the Bharatiya Nyaya Sanhita, and an investigation is underway, he added.
