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Weight Loss After Bariatric Surgery Significantly Improves Carotid and Cardiac Function in Apparently Healthy People
Alessandro Giudici1, Carlo Palombo2, Michaela Kozakova3
1Department of Mechanical and Aerospace Engineering, Brunel University London, Kingston Lane, Uxbridge, Middlesex, UB8 3PH, UK.
Insights
Intensive weight loss through diet and bariatric surgery significantly improves cardiovascular health by reducing arterial stiffness and enhancing diastolic function in patients with severe obesity.
Area of Science:
- Cardiology
- Metabolic Surgery
- Vascular Medicine
Background:
- Obesity is a major risk factor for cardiovascular disease, leading to hypertension, impaired left ventricular function, and arterial stiffness.
- Carotid artery hemodynamics are critical indicators of stroke and cognitive decline risk.
- Bariatric surgery and weight loss interventions can improve metabolic and cardiovascular parameters in morbid obesity.
Purpose of the Study:
- To assess the impact of a three-stage bariatric strategy (diet, surgery, weight loss) on carotid hemodynamics and cardiac diastolic function.
- To evaluate changes in carotid pulse wave velocity and left ventricular diastolic function post-intervention.
- To determine the effectiveness of bariatric interventions in mitigating cardiovascular risks associated with severe obesity.
Main Methods:
- Prospective study of 26 severely obese patients (mean age 45 years) without comorbidities.
- Measurements included anthropometry, blood pressure, Doppler echocardiography, and carotid hemodynamics (carotid pulse wave velocity) at baseline, post-diet, and post-surgery.
- Utilized the lnDU-loop method to estimate local carotid pulse wave velocity (ncPWV).
Main Results:
- Significant reduction in BMI (47.9 to 30% post-surgery) and blood pressure post-diet.
- Carotid pulse wave velocity (ncPWV) decreased by 10% post-diet and 23% post-surgery, independent of blood pressure changes.
- Improved E/A ratio (diastolic function marker) from 0.95 to 1.27, with reduced heart rate and cardiac output.
Conclusions:
- Weight loss achieved through diet and bariatric surgery effectively reduces carotid arterial stiffness.
- Bariatric interventions significantly improve left ventricular diastolic function in patients with severe obesity.
- Diet and bariatric surgery offer a potent strategy to address the adverse cardiovascular effects of morbid obesity.
Purpose:
Obesity clearly increases cardiovascular risk, often inducing high blood pressure (BP), impaired left ventricular (LV) function, and increased arterial stiffness. Intensive weight loss and bariatric surgery induce improvement in hypertension and diabetes for morbid obesity. Carotid artery haemodynamics is a powerful prognostic indicator for stroke and cognitive decline independent of BP. The aim of this study was to evaluate the impact of a 3-stage bariatric strategy of diet, bariatric surgery, and consequent weight loss on carotid haemodynamics and cardiac diastolic function.
Material And Methods:
This prospective study included 26 patients (45 ± 10 years, 4 men) with severe obesity undergoing bariatric surgery without comorbidities (hypertension, diabetes, etc.). Anthropometry, BP, Doppler echocardiography, and common carotid haemodynamics by ultrasound were measured at three times: (1) baseline, (2) after 1-month diet (post-diet), and (3) 8 months after surgery (post-surgery). The lnDU-loop method was used to estimate local carotid pulse wave velocity (ncPWV).
Results:
Baseline BMI was 47.9 ± 7.1 kg/m2 and reduced by 5% and 30% post-diet and post-surgery, respectively. BP decreased only post-diet, without pulse pressure change. However, ncPWV, 6.27 ± 1.35 m/s at baseline, was significantly reduced by 10% and 23% post-diet and post-surgery, respectively, also adjusted for BP changes. The E/A ratio rose from 0.95 ± 0.20 to 1.27 ± 0.31 (p < 0.005), without change in LV geometry or mass, while heart rate and cardiac output fell substantially.
Conclusion:
Weight loss following diet and bariatric surgery is associated with reduced carotid arterial stiffness and improved LV diastolic function. Diet and bariatric surgery are effective treatments for morbid obesity with its concomitant adverse cardiovascular effects.
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