Heart attacks are more serious in the morning: study

Heart attacks that occur in the morning are likely to be more serious than attacks at other times of the day, a specialist journal reported on Wednesday.

Spanish researchers looked at data from 811 patients who had been admitted to a Madrid clinic with a myocardial infarction between 2003 and 2009.

They used levels of an enzyme in the blood to measure the extent of dead tissue, known as an infarct, which is caused by blocked blood supply to heart muscle.

Those who had had a heart attack between 6:00 am and noon, during the transition from darkness to light, had a 21-percent larger infarct compared with patients whose attack occurred between 6:00 pm and midnight.

The study, published in the British journal Heart, builds on previous evidence that circadian rhythm - the famous "body clock" - influences the heart in many ways such as blood pressure, heart rate, cardiac output and the function of cells that line cardiac blood vessels.

Of the 811 patients, 269 had their heart attacks in the period from 6:00 am to noon. More than three-quarters of the patients admitted to the clinic were men. Their average age was 62.

The findings should be useful in assessing the effectiveness of drugs against heart disease, the researchers said.

ri/boc

 

Voices
Homeless Veterans charity auction: Cook with Angela Hartnett and Neil Borthwick at Merchants Tavern
charity appeal
Sport
Amir Khan is engaged in a broader battle than attempting to win a fight with Floyd Mayweather
boxing Exclusive: Amir Khan reveals plans to travel to Pakistan
Arts and Entertainment
Strictly finalists Simon Webbe, Caroline Flack, Mark Wright and Frankie Bridge
tvLive: Simon Webbe, Caroline Flack, Mark Wright and Frankie Bridge face-off in the final
Sport
Ched Evans in action for Sheffield United in 2012
footballRonnie Moore says 'he's served his time and the boy wants to play football'
PROMOTED VIDEO
Life and Style
ebookNow available in paperback
Life and Style
ebooksA superb mix of recipes serving up the freshest of local produce in a delicious range of styles
Latest stories from i100
Have you tried new the Independent Digital Edition apps?

ES Rentals

    Independent Dating
    and  

    By clicking 'Search' you
    are agreeing to our
    Terms of Use.

    iJobs Job Widget
    iJobs General

    Recruitment Genius: Finance Director

    £65000 - £80000 per annum: Recruitment Genius: Finance Director required to jo...

    Recruitment Genius: Medico-Legal Assistant

    £15000 - £25000 per annum: Recruitment Genius: This is a unique opportunity fo...

    Ashdown Group: (PHP / Python) - Global Media firm

    £50000 per annum + 26 days holiday,pension: Ashdown Group: A highly successful...

    The Jenrick Group: Quality Inspector

    £27000 per annum + pension + holidays: The Jenrick Group: A Quality Technician...

    Day In a Page

    Amir Khan: 'The Taliban can threaten me but I must speak out... innocent kids, killed over nothing. It’s sick in the mind'

    Amir Khan attacks the Taliban

    'They can threaten me but I must speak out... innocent kids, killed over nothing. It’s sick in the mind'
    Homeless Veterans appeal: 'You look for someone who's an inspiration and try to be like them'

    Homeless Veterans appeal

    In 2010, Sgt Gary Jamieson stepped on an IED in Afghanistan and lost his legs and an arm. He reveals what, and who, helped him to make a remarkable recovery
    Could cannabis oil reverse the effects of cancer?

    Could cannabis oil reverse effects of cancer?

    As a film following six patients receiving the controversial treatment is released, Kate Hilpern uncovers a very slippery issue
    The Interview movie review: You can't see Seth Rogen and James Franco's Kim Jong Un assassination film, but you can read about it here

    The Interview movie review

    You can't see Seth Rogen and James Franco's Kim Jong Un assassination film, but you can read about it here
    Serial mania has propelled podcasts into the cultural mainstream

    How podcasts became mainstream

    People have consumed gripping armchair investigation Serial with a relish typically reserved for box-set binges
    Jesus Christ has become an unlikely pin-up for hipster marketing companies

    Jesus Christ has become an unlikely pin-up

    Kevin Lee Light, aka "Jesus", is the newest client of creative agency Mother while rival agency Anomaly has launched Sexy Jesus, depicting the Messiah in a series of Athena-style poses
    Rosetta space mission voted most important scientific breakthrough of 2014

    A memorable year for science – if not for mice

    The most important scientific breakthroughs of 2014
    Christmas cocktails to make you merry: From eggnog to Brown Betty and Rum Bumpo

    Christmas cocktails to make you merry

    Mulled wine is an essential seasonal treat. But now drinkers are rediscovering other traditional festive tipples. Angela Clutton raises a glass to Christmas cocktails
    5 best activity trackers

    Fitness technology: 5 best activity trackers

    Up the ante in your regimen and change the habits of a lifetime with this wearable tech
    Paul Scholes column: It's a little-known fact, but I have played one of the seven dwarves

    Paul Scholes column

    It's a little-known fact, but I have played one of the seven dwarves
    Fifa's travelling circus once again steals limelight from real stars

    Fifa's travelling circus once again steals limelight from real stars

    Club World Cup kicked into the long grass by the continued farce surrounding Blatter, Garcia, Russia and Qatar
    Frank Warren column: 2014 – boxing is back and winning new fans

    Frank Warren: Boxing is back and winning new fans

    2014 proves it's now one of sport's biggest hitters again
    Jeb Bush vs Hillary Clinton: The power dynamics of the two first families

    Jeb Bush vs Hillary Clinton

    Karen Tumulty explores the power dynamics of the two first families
    Stockholm is rivalling Silicon Valley with a hotbed of technology start-ups

    Stockholm is rivalling Silicon Valley

    The Swedish capital is home to two of the most popular video games in the world, as well as thousands of technology start-ups worth hundreds of millions of pounds – and it's all happened since 2009
    Did Japanese workers really get their symbols mixed up and display Santa on a crucifix?

    Crucified Santa: Urban myth refuses to die

    The story goes that Japanese store workers created a life-size effigy of a smiling "Father Kurisumasu" attached to a facsimile of Our Lord's final instrument of torture