The Effect of Bariatric Surgery on Microvascular Structure and Function, Peripheral Pressure Waveform and General...

Area of Science:

• Cardiovascular Science
• Metabolic Surgery
• Ophthalmology

Background:

• Obesity is a major risk factor for cardiovascular disease (CVD).
• Bariatric surgery, such as Roux-en-Y gastric bypass (RYGB), is effective for weight loss in obese individuals.
• The impact of RYGB on microvascular function and CVD risk requires further investigation.

Purpose of the Study:

• To evaluate the effects of RYGB on retinal microvascular calibre.
• To assess changes in peripheral microvascular function and pressure waveforms post-surgery.
• To determine the impact of RYGB on the general CVD risk in obese patients.

Main Methods:

• A cohort of 29 obese participants undergoing RYGB was studied.
• Measurements were taken before and one year after surgery.
• Assessed parameters included anthropometrics, blood markers, Framingham Risk Score (FRS), retinal vessel calibre (Zeiss fundus camera, VesselMap), systemic arterial stiffness (pulse wave analysis), and peripheral microvascular reactivity (digital thermal monitoring).

Main Results:

• Significant reductions in BMI, waist, and neck circumference were observed post-surgery (p < 0.001).
• General CVD risk (FRS) significantly improved (p < 0.001).
• Retinal vessel calibre (CRAE, CRVE), systemic arterial stiffness, and peripheral microvascular reactivity all showed significant improvements (p < 0.003, p < 0.001, p = 0.008 respectively).

Conclusions:

• RYGB surgery positively impacts overall vascular health in obese patients.
• Bariatric surgery leads to a significant reduction in cardiovascular disease risk.
• RYGB offers benefits beyond weight loss, improving microvascular and macrovascular function.