Effect of bariatric surgery on long-term cardiovascular outcomes: a nationwide nested cohort study

Area of Science:

• Cardiovascular Medicine
• Bariatric Surgery Outcomes
• Obesity Management

Background:

• Obesity is a major risk factor for cardiovascular disease.
• Bariatric surgery is an effective weight-loss intervention for patients with obesity.
• Long-term cardiovascular effects of bariatric surgery require further investigation.

Purpose of the Study:

• To evaluate the long-term impact of bariatric surgery on cardiovascular outcomes.
• To compare cardiovascular event rates in patients who underwent bariatric surgery versus matched controls.
• To assess the risk of myocardial infarction, stroke, heart failure, and mortality post-bariatric surgery.

Main Methods:

• A nested cohort study using the Clinical Practice Research Datalink.
• Inclusion of 3701 patients who underwent bariatric surgery and 3701 matched controls.
• Primary endpoint: composite of fatal/non-fatal myocardial infarction and ischemic stroke; secondary endpoints: individual components, heart failure, and mortality.

Main Results:

• Bariatric surgery patients had significantly lower major adverse cardiovascular events (HR 0.410, P < 0.001).
• Reductions observed in myocardial infarction (HR 0.412, P < 0.001) and heart failure (HR 0.403, P = 0.026).
• No significant reduction in ischemic stroke (HR 0.536, P = 0.301); significant reduction in mortality (HR 0.254, P < 0.001).

Conclusions:

• Bariatric surgery is associated with a reduced long-term risk of major cardiovascular events in obese patients.
• The procedure demonstrates a significant benefit in preventing heart failure and reducing overall mortality.
• Findings support bariatric surgery as a strategy to mitigate cardiovascular risk in individuals with obesity.