一項最新研究發現，重度肥胖患者在胃旁路手術之后，血壓出現顯著而長久的改善。

Pittsburgh大學醫學中心(UPMC, Pennsylvania, USA)體重控制中心的研究人員，分析了347例肥胖患者，開始體重指數(BMI)大于40，在1992-2001年期間在1992-2001年UPMC接受了胃旁路手術。半數患者在手術之前診斷為高血壓，但是只有少數患者曾經接受過高血壓治療。在資料分析的時間點，術后18個月，他們的BMIs穩定在35左右，仍然屬于肥胖。

在術前沒有接受過手術治療的患者，血壓出現了顯著下降，一直持續至術后18個月。在術前接受過高血壓治療的患者，在術后大約有1/3能夠減少或者不再使用藥物治療。血壓正常的患者術后血壓沒有顯著改變。這些研究結果發表在20063月份的《手術檔案》。
 

Blood Pressure Drops Along With Weight
 
A new study finds that severely obese patients may experience significant, long-term improvements in blood pressure after gastric bypass surgery.

Researchers at the University of Pittsburgh Medical Center (UPMC, Pennsylvania, USA) Weight Management Center analyzed data from 347 obese patients, with an initial body mass index (BMI) greater than 40, who underwent gastric bypass surgery at UPMC between 1992 and 2001. Half of the study patients were diagnosed as hypertensive prior to surgery, but only some of them were being treated for their hypertension. At the time of data analysis, 18 months after surgery, their BMIs had stabilized to about 35, still categorized as obese.
 
The patients who were not being treated for hypertension prior to surgery experienced significant blood pressure decreases that continued to remain low 18 months after surgery. Of the patients under active drug treatment for hypertension prior to surgery, about one-third were able to reduce or eliminate their blood pressure medications after surgery. The group of patients with normal blood pressure showed insignificant changes following surgery. The results were published in the March 2006 issue of the Archives of Surgery.