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Bariatric surgery linked to reduced blood pressure at 18 months after surgery
March 21, 2006The prevalence of hypertension (high blood pressure) appears to decline and remain low after bariatric surgery, and blood pressure drops the most among patients who had untreated hypertension before the procedure, according to a study in the March issue of Archives of Surgery, one of the JAMA/Archives journals.
John D. Fernstrom, Ph.D., and colleagues at the University of Pittsburgh School of Medicine reviewed the medical charts of 347 patients who had undergone bariatric surgery between 1992 and 2001. Information about patients' weight loss, BMI, blood pressure and use of medications to control hypertension was recorded at follow-up visits in the 18 months after their procedures.
About half of the patients had hypertension before surgery and all had a beginning BMI of 40 or greater. After surgery, patients' BMI decreased and stabilized at around 35 after 18 months. Systolic (top number) blood pressure decreased modestly and diastolic (bottom number) blood pressure decreased significantly 18 months after surgery. Patients without hypertension and those taking antihypertensive medications experienced smaller drops in blood pressure than those with hypertension who were not taking medications. Of the 103 patients who were taking medications to control blood pressure before surgery, 35 were able to stop taking the drugs during follow-up, and their blood pressures remained in the normal range.
"Our findings are consistent with the notion that systolic and diastolic blood pressures improve when very obese individuals lose weight after bariatric surgery," the authors conclude. "The incidence of hypertension also declines, as reflected by the reduction in the number of individuals requiring antihypertensive medications to maintain a normal blood pressure and by the notable decline in systolic and diastolic blood pressure in subjects who had high blood pressure (stage 1 hypertension) but were unaware of it. However, the results cannot answer whether blood pressure and the incidence of hypertension ultimately return to presurgical levels; perhaps a future, prospective study will resolve this issue."
JAMA and Archives Journals
"Our findings are consistent with the notion that systolic and diastolic blood pressures improve when very obese individuals lose weight after bariatric surgery," the authors conclude. "The incidence of hypertension also declines, as reflected by the reduction in the number of individuals requiring antihypertensive medications to maintain a normal blood pressure and by the notable decline in systolic and diastolic blood pressure in subjects who had high blood pressure (stage 1 hypertension) but were unaware of it. However, the results cannot answer whether blood pressure and the incidence of hypertension ultimately return to presurgical levels; perhaps a future, prospective study will resolve this issue."
JAMA and Archives Journals
Bariatric Surgery Current Events and Bariatric Surgery News RSSEnergy gap useful tool for successful weight loss maintenance strategy
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Addressing obesity via the 'energy gap'
The November issue of the Journal of the American Dietetic Association features a commentary by James O. Hill, an honorary ADA member, professor of pediatrics and medicine and director of the Center for Human Nutrition at the University of Colorado-Denver.
'Superobesity,' chronic disease burden associated with risk of death following bariatric surgery
Veterans classified as superobese and those with a higher chronic disease burden appear more likely to die within a year of having bariatric surgery, according to a report in the October issue of Archives of Surgery, one of the JAMA/Archives journals.
NIH study finds low short-term risks after bariatric surgery for extreme obesity
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Study: Bariatric surgery patients have 67 percent lower chance of complications at top hospitals
The HealthGrades Fourth Annual Bariatric Surgery Trends in American Hospitals Study released today identifies 88 hospitals as "best" performers (five-star rated), with mortality rates, complication rates and patient lengths of stay that are dramatically lower than poorly rated hospitals.
A simpler definition for major depressive disorder
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Roux-en-Y weight loss surgery raises kidney stone risk
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Physiological response may explain why some severely obese patients overeat
Don't feel like you are getting full when eating a large meal? New research from The Miriam Hospital suggests that a physiological response may partially explain why severely obese individuals may not feel satisfied after eating and often have difficulty controlling the amount of food they consume during a meal.
Waiting times too long for bariatric surgery
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Calorie restriction causes temporal changes in liver metabolism
Moderate calorie restriction causes temporal changes in the liver and skeletal muscle metabolism, whereas moderate weight loss affects muscle.
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