Navigation Links
Blood Pressure Tougher to Tame in Winter
Date:11/5/2007

Frigid temperatures may help keep vessels constricted, experts say

MONDAY, Nov. 5 (HealthDay News) -- It turns out blood pressure has a chill factor: Hypertension is harder to control in colder weather, heart experts say.

But the finding, expected to be presented Monday at the American Heart Association annual meeting, in Orlando, Fla., is not exactly new.

"It has been noted for decades that people's blood pressure tends to be a little bit harder to control or a little bit higher in cold climates," said Dr. Kenneth Baker, M.D., a professor of internal medicine at the Texas A&M Health Science Center College of Medicine.

He was not involved in the study, which was led by Dr. Ross Fletcher, of the Department of Veterans' Affairs and Georgetown University in Washington, D.C.

The study drew on a vast database: the VA's storehouse of 1.8 billion vital statistics records. The five-year study looked at electronic health records for almost 1.2 million patients cared for at 15 VA hospitals located at different latitudes: Anchorage, Alaska; Baltimore; Boston; Chicago; Fargo, N.D.; Honolulu. Hawaii; Houston; West Los Angeles, Calif.; Miami; Minneapolis; New York City; Philadelphia; San Juan, Puerto Rico; Portland, Ore; and Washington, D.C.

The average age of participants was 66. Fifty-one percent were Caucasian, 21 percent were Hispanic, and 27 percent were black. Less than 4 percent were female.

Within the sample, almost 444,000 veterans had high blood pressure (based on readings of more than 140/90 on three separate days).

And, regardless of their locale, patients experienced an average difference of almost 8 percent in getting their high blood pressure back to normal between winter and summer, with that feat being much tougher in winter.

Why?

Baker posited any number of reasons.

"My guess is that one of the top reasons is, when you're in a cold atmosphere, you vasoconstrict [blood vessels narrow]," he said. "If you stick your hand in ice water, it has the same effect. Blood pressure goes up a little, and in hotter climates, sitting by the pool in your swimming suit, the vessels in the skin are dilating, you lose water and sweat off salt, and blood pressure drops."

There are other possible factors as well. Cold medicines people take in the winter can raise blood pressure, as can non-steroidal anti-inflammatory painkillers.

People also tend to be more depressed in the darker months, leading to more alcohol and coffee consumption, both of which can raise blood pressure, the expert said.

A more obvious reason: People are also often more sedentary in the winter, staying inside and eating more. This can have a secondary effect -- weight gain -- which also contributes to hypertension.

Baker believes that these biological or lifestyle differences are more likely to explain the findings than southern or northern climate or the amount of light.

Overall, however, VA hospitals in all the cities studied showed improvements of about 4 percent per year in their ability to keep patients' average blood pressure under control, the study found.

More information

There's more on lowering blood pressure at the U.S. National Heart, Lung, and Blood Institute.



SOURCES: Kenneth Baker, M.D., professor, internal medicine, Texas A&M Health Science Center College of Medicine; Nov. 5, 2007, presentation, American Heart Association annual meeting, Orlando, Fla.


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Specific antagonism lowers blood pressure
2. Restricting Blood Flow May Help Heart Bypass Patients
3. FDA Updates Prescription Guidelines for Blood Thinner
4. Doctors Often Miss High Blood Pressure in Kids
5. Back to School Means Return of School Blood Drives
6. Blood-flow detector software show promise in preventing brain damage
7. FDA Approves New Roche West Nile Virus Blood Screening Test
8. Australian-led international study shows blood pressure drugs cut death rate in type 2 diabetes
9. Laser blasts viruses in blood
10. Study Demonstrates Marteks Algal DHA Oil Improves Blood Triglyceride Lipid Levels
11. LifeMasters Provides Tips for Maintaining a Healthy Blood Cholesterol Level
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Blood Pressure Tougher to Tame in Winter
(Date:7/25/2017)... ... , ... Summers in Palm Springs sizzle, but there are ways to stay ... cream, sparkling pools, and mile-high fun. , At Arrive's Ice Cream and Shop(pe), scoops ... knick knacks. Ice cream and sorbet flavors rotate, but the classics are always available ...
(Date:7/25/2017)... ... 2017 , ... SureVest Insurance Group, a locally managed firm ... Carolina, is launching a charity event in conjunction with the Triangle Chapter of ... against bladder cancer. , The Bladder Cancer Advocacy Network (BCAN) operates multiple outreach ...
(Date:7/25/2017)... Texas (PRWEB) , ... July 25, 2017 , ... ... fastest growing ATM provider in the United States, today announced its partnership with ... financial institutions. , The foundation of the solution lies within Hyosung’s superior ...
(Date:7/25/2017)... ... July 25, 2017 , ... ... its Product Innovation in the prestigious CEO World Awards®. The coveted annual CEO ... products and services, CEO case studies, corporate social responsibility, and milestones from every ...
(Date:7/24/2017)... , ... July 24, 2017 ... ... Director,      (407) 916-7235, kklaproth(at)robinsmorton(dot)com , Robins & Morton, Perkins ... to celebrate the structural topping out of the new Destination Medical Building ...
Breaking Medicine News(10 mins):
(Date:7/13/2017)... , July 13, 2017 RK Logistics Group, ... of Pharmacy certification for its Fremont, CA ... solutions in the Tri-Valley and San Jose ... City of Fremont , with its Fremont Innovation ... to provide such a powerful resource to the hundreds of ...
(Date:7/12/2017)... INDIANAPOLIS , July 12, 2017  Eli Lilly and ... settlement agreement with generic companies to resolve pending patent litigation ... Virginia regarding the Cialis ® ... expire on April 26, 2020. As part of the agreement, ... on September 27, 2018. "The unit dose patent ...
(Date:7/11/2017)... 2017  The global market for liquid biopsy diagnostic ... million in 2016.  Although in early stages, the global ... particular as a result of the gradual shift towards ... introduction of a significant number of new liquid biopsy ... tumor biomarkers to guide treatment decisions. ...
Breaking Medicine Technology: