Navigation Links
Clock-shifts affect risk of heart attack
Date:10/30/2008

Adjusting the clocks to summer time on the last Sunday in March increases the risk of myocardial infarction in the following week. In return, putting the clocks back in the autumn reduces the risk, albeit to a lesser extent. This according to a new Swedish study published in the prestigious New England Journal of Medicine.

Scientists at Karolinska Institutet have examined how the incidence of myocardial infarction in Sweden has changed with the summer and winter clock-shifts since 1987. Their results show that the number of heart attacks, on average, increases by about five per cent during the first week of summer time.

"There's a small increase in risk for the individual, especially during the first three days of the new week," says Dr Imre Janszky, one of the researchers behind the study. "The disruption in the chronobiological rhythms, the loss of one hour's sleep and the resulting sleep disturbance are the probable causes."

The team also observed that the readjustment back to winter time on the last Sunday in October, which gives us an extra hour's sleep, is followed by a reduction in the risk of heart attack on the Monday. The reduction for the whole week is, however, less than the increase related to the summer adjustment.

According to the scientists, the study provides a conceivable explanation for why myocardial infarction is most common on Mondays, as demonstrated by previous research.

"It's always been thought that it's mainly due to an increase in stress ahead of the new working week," says Dr Janszky. "But perhaps it's also got something to do with the sleep disruption caused by the change in diurnal rhythm at the weekend."

Even though the increase and decrease in risk are relatively small for the individual, the team believes that the study can improve our understanding of how disruptions to diurnal rhythms impact on our health.

"Roughly 1.5 billion people are subjected to these clock-shifts every year, but it's hard to make any generalised statement about how many heart attacks they can cause," adds Dr Rickard Ljung, another member of the research team.


'/>"/>

Contact: Sabina Bossi
sabina.bossi@ki.se
46-852-486-066
Karolinska Institutet
Source:Eurekalert

Related medicine news :

1. Cutting Salt Wont Affect Foods Safety
2. A childs IQ could be affected by maternal epilepsy
3. Sexual function affected by stem cell transplant according to long-term study
4. Family history of alcoholism affects response to drug used to treat heavy drinking
5. Obesity Wont Affect Seniors Memory
6. Genetic variation affects smoking cessation treatment
7. Schizophrenia candidate genes affect even healthy individuals
8. R rating might be unlikely to affect teens exposure to smoking in movies
9. Painful condition affecting kidney failure patients increases risk of death
10. Patients perceived cancer care unaffected by lower Medicare reimbursements
11. The Current Recall of Boy Scouts of Americas Plastic Badges Does Not Affect Embroidered Insignia, Badges & Awards Produced by Lion Brothers Company Inc.
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2017)... ... June 23, 2017 , ... "The Better Care Reconciliation Act ... harm to people with all chronic conditions, including mental illnesses, while increasing the ... the Affordable Care Act (ACA) requirement that insurers cover pre-existing conditions, it does ...
(Date:6/23/2017)... ... ... Studies show evidence that carotenoids and antioxidants derived either from the diet or from ... how often do ophthalmologists and optometrists in Sweden recommend the use of nutritional supplements, ... symptoms of AMD? A study published recently in Dove Medical Press journal, ...
(Date:6/23/2017)... ... June 23, 2017 , ... Military Connection friend and veteran ... the JFK Virgin Atlantic lounge. , Bensko is no stranger to the plight ... Bensko dedicated her life to supporting our wounded veterans. A world-class photographer, her riveting ...
(Date:6/23/2017)... ... June 23, 2017 , ... The Aesthetic Channel has recently highlighted ... has come up with a proprietary technique that he calls the AuraLyft ... dropped. For all ages, patients can expect to look refreshed, rejuvenated, and revitalized. ...
(Date:6/23/2017)... ... ... 21 Middle East and South Asia Leaders Selected as Eisenhower Fellows , ... society in 11 countries across the Middle East and South Asia to embark on ... knowledge and ideas with the leading minds in their fields. , For the ...
Breaking Medicine News(10 mins):
(Date:6/7/2017)... June 7, 2017 Endo International plc (NASDAQ: ... 2017, the Hon. Joseph R. Goodwin , U.S. ... West Virginia , entered a case management ... Repair System Products Liability Litigation (the "MDL") that includes ... to provide expert disclosures on specific causation within one ...
(Date:6/3/2017)... 3, 2017  Eli Lilly and Company (NYSE: ... from the Phase 3 MONARCH 2 study showed ... inhibitor, in combination with fulvestrant, significantly improved progression-free ... in women with hormone-receptor-positive (HR+), human epidermal growth ... have relapsed or progressed after endocrine therapy (median ...
(Date:5/30/2017)... May 30, 2017 Therapix Biosciences Ltd. (Nasdaq: ... in the development of cannabinoid-based drugs, today announced ... overview at three upcoming scientific and investor conferences ... Micro Invitational: ... Date:                     Wednesday, ...
Breaking Medicine Technology: