Abstract
Increases in intra-abdominal visceral adipose tissue have been widely appreciated as a risk factor for metabolic disorders such as dyslipidemia, hypertension, insulin resistance, and type 2 diabetes, whereas this is not the case for peripheral or subcutaneous obesity. While the underlying mechanisms that contribute to these differences in adipose tissue activity remain uncertain, increases in visceral fat commonly induce metabolic dysregulation, in part because of increased venous effluent of fatty acids and/or adipokines/cytokines to the liver. Increased body weight, paralleled by an increase in plasma markers of the insulin-resistance syndrome and chronic inflammation, is independently associated with coronary circulatory dysfunction. Recent data suggest that plasma proteins originating from the adipose tissue, such as endocannabinoids (EC), leptin, and adiponectin (termed adipocytes) play a central role in the regulation and control of coronary circulatory function in obesity. Positron emission tomography (PET) in concert with tracer kinetic modeling is a well established technique for quantifying regional myocardial blood flow at rest and in response to various forms of vasomotor stress. Myocardial flow reserve assessed by PET provides a noninvasive surrogate of coronary circulatory function. PET also enables the monitoring and characterization of coronary circulatory function in response to gastric bypass-induced weight loss in initially morbidly obese individuals, to medication and/or behavioral interventions related to weight, diet, and physical activity. Whether the observed improvement in coronary circulatory dysfunction via weight loss may translate to diminution in cardiovascular events awaits clinical confirmation.
Similar content being viewed by others
References
Papers of particular interest, published recently, have been highlighted as: • Of importance •• Of major importance
• Apovian CM, Gokce N. Obesity and cardiovascular disease. Circulation. 2012;125:1178–82. This review article provides an excellent update on the relationship between obesity and cardiovascular disease.
Cornier MA, Despres JP, Davis NE, et al. Assessing adiposity: a scientific statement from the American Heart Association. Circulation. 2011;124:1996–2019.
Rexrode KM, Carey VJ, Hennekens CH, Walters EE, Colditz GA, Stampfer MJ, et al. Abdominal adiposity and coronary heart disease in women. JAMA. 1998;280:1843–8.
Lissner L, Björkelund C, Heitmann BL, Seidell JC, Bengtsson C. Larger hip circumference independently predicts health and longevity in a Swedish female cohort. Obes Res. 2001;9:644–6.
Brook RD, Bard RL, Rubenfire M, Ridker PM, Rajagopalan S. Usefulness of visceral obesity (waist/hip ratio) in predicting vascular endothelial function in healthy overweight adults. Am J Cardiol. 2001;88:1264–9.
•• Schindler TH, Cardenas J, Prior JO, Facta AD, Kreissl MC, Zhang X-L, et al. Relationship between increasing body weight, insulin resistance, inflammation, adipocytokine leptin, and coronary circulatory function. J Am Coll Cardiol. 2006;47:1188–95. These observations are the first to describe independent adverses effects of increased body weight on coronary circulatory function.
Pascot A, Després JP, Lemieux I, Bergeron J, Nadeau A, Prud’homme D, et al. Contribution of visceral obesity to the deterioration of the metabolic risk profile in men with impaired glucose tolerance. Diabetologia. 2000;43:1126–35.
Reaven G. Banting lecture 1988. Role of insulin resistance in human disease. Diabetes. 1988;37:1595–607.
Widén E, Lehto M, Kanninen T, Walston J, Shuldiner AR, Groop LC. Association of a polymorphism in the beta 3-adrenergic-receptor gene with features of the insulin resistance syndrome in Finns. N Engl J Med. 1995;333:348–51.
Yokota T, Oritani K, Takahashi I, Ishikawa J, Matsuyama A, Ouchi N, et al. Adiponectin, a new member of the family of soluble defense collagens, negatively regulates the growth of myelomonocytic progenitors and the functions of macrophages. Blood. 2000;96:1723–32.
•• Hotamisligil GS. Inflammation and metabolic disorders. Nature. 2006;444:860–7. This review provides very valuable information on mediators and the inflammatory state in obesity.
Conway JM, Yanovski SZ, Avila NA, Hubbard VS. Visceral adipose tissue differences in black and white women. Am J Clin Nutr. 1995;61:765–71.
•• Hamdy O, Porramatikul S, Al-Ozairi E. Metabolic obesity: the paradox between visceral and subcutaneous fat. Curr Diabetes Rev. 2006;2:367–73. This review article provides a very thorough update on metabolic differences between intraabdominal visceral and subcutaneous fat.
Pouliot MC, Després JP, Nadeau A, Moorjani S, Prud’Homme D, Lupien PJ, et al. Visceral obesity in men. Associations with glucose tolerance, plasma insulin, and lipoprotein levels. Diabetes. 1992;41:826–34.
Tankó LB, Bagger YZ, Alexandersen P, Larsen PJ, Christiansen C. Peripheral adiposity exhibits an independent dominant antiatherogenic effect in elderly women. Circulation. 2003;107:1626–31.
Seidell JC, Pérusse L, Després JP, Bouchard C. Waist and hip circumferences have independent and opposite effects on cardiovascular disease risk factors: the Quebec Family Study. Am J Clin Nutr. 2001;74:315–21.
Alagna S, Cossu ML, Gallo P, Tilocca PL, Pileri P, Alagna G, et al. Biliopancreatic diversion: long-term effects on gonadal function in severely obese men. Surg Obes Relat Dis. 2006;2:82–6.
Foster MT, Pagliassotti MJ. Metabolic alterations following visceral fat removal and expansion: beyond anatomic location. Adipocyte. 2012;1:192–9.
Daniels SR, Morrison JA, Sprecher DL, Khoury P, Kimball TR. Association of body fat distribution and cardiovascular risk factors in children and adolescents. Circulation. 1999;99:541–5.
Van Pelt RE, Evans EM, Schechtman KB, Ehsani AA, Kohrt WM. Contributions of total and regional fat mass to risk for cardiovascular disease in older women. Am J Physiol Endocrinol Metab. 2002;282:E1023–8.
Drapeau V, Lemieux I, Richard D, Bergeron J, Tremblay A, Biron S, et al. Metabolic profile in severely obese women is less deteriorated than expected when compared with moderately obese women. Obes Surg. 2006;16:501–9.
Wolf AM, Buffington C, Beisiegel U. Comparison of metabolic risk factors between severely and very severely obese patients. Obesity. 2006;14:2177–83.
Faintuch J, Marques PC, Bortolotto LA, Faintuch JJ, Cecconello I. Systemic inflammation and cardiovascular risk factors: are morbidly obese subjects different? Obes Surg. 2008;18:854–62.
•• Schindler TH, Schelbert HR, Quercioli A, Dilsizian V. Cardiac PET imaging for the detection and monitoring of coronary artery disease and microvascular health. JACC Cardiovasc Imaging. 2010;3:623–40. This review provides an excellent update on clinical and research possibilities of noninvasive MBF quantification with PET/CT.
Oliak D, Ballantyne GH, Davies RJ, Wasielewski A, Schmidt HJ. Short-term results of laparoscopic gastric bypass in patients with BMI> or =60. Obes Surg. 2002;12:643–7.
Marette A, Mauriège P, Marcotte B, Atgié C, Bouchard C, Thériault G, et al. Regional variation in adipose tissue insulin action and GLUT4 glucose transporter expression in severely obese premenopausal women. Diabetologia. 1997;40:590–8.
•• Quercioli A, Pataky Z, Vincenti G, Makoundou V, Di Marzo V, Montecucco F, et al. Elevated endocannabinoid plasma levels are associated with coronary circulatory dysfunction in obesity. Eur Heart J. 2011;32:1369–78. This study is the first to describe adverse effects of increases in endocannabinoid plasma levels on coronary circulatory function in obesity.
• Valenta I, Dilsizian V, Quercioli A, Schelbert HR, Schindler TH. The influence of insulin resistance, obesity, and diabetes mellitus on vascular tone and myocardial blood flow. Curr Cardiol Rep. 2012;14:217–25. Excellent review article describing the potential of PET flow quantification in the assessment of coronary circulatory dysfunction in the pre-diabetic and diabetic state.
• Goldstein BJ, Scalia RG, Ma XL. Protective vascular and myocardial effects of adiponectin. Nat Clin Pract Cardiovasc Med. 2009;6:27–35. Excellent overview article on the role of adiponectin in the cardiovascular system.
•• Quercioli A, Pataky Z, Montecucco F, Carballo S, Thomas A, Staub C, et al. Coronary vasomotor control in obesity and morbid obesity: contrasting flow responses with endocannabinoids, leptin, and inflammation. JACC Cardiovasc Imaging. 2012;5:805–15. Important investigation, which identifies and characterizes obesity and morbid obesity as different disease entities affecting coronary circulatory function.
•• Quercioli A, Montecucco F, Pataky Z, Thomas A, Ambrosio G, Staub C, et al. Improvement in coronary circulatory function in morbidly obese individuals after gastric bypass-induced weight loss: relation to alterations in endocannabinoids and adipocytokines. Eur Heart J. 2013;34:2063–73. This investigation is the first to demonstrate a normalization of coronary circulatory function after gastric bypass-induced weight loss in initially morbidly obese individuals.
Benraouane F, Litwin SE. Reductions in cardiovascular risk after bariatric surgery. Curr Opin Cardiol. 2011;26:555–61.
• Valenta I, Dilsizian V, Quercioli A, Ruddy TD, Schindler TH. Quantitative PET/CT measures of myocardial flow reserve and atherosclerosis for cardiac risk assessment and predicting adverse patient outcomes. Curr Cardiol Rep. 2013;15:344. Thorough review on the potential of cardiac PET/CT in the detection and identification of CAD process and prognostic implications.
•• Gokce N, Vita JA, McDonnell M, Forse AR, Istfan N, Stoeckl M, et al. Effect of medical and surgical weight loss on endothelial vasomotor function in obese patients. Am J Cardiol. 2005;95:266–8. The study is first to denote the effects of bariatric surgery-induced weight loss on flow-mediated brachial artery function.
Watts K, Beye P, Siafarikas A, Davis EA, Jones TW, O’Driscoll G, et al. Exercise training normalizes vascular dysfunction and improves central adiposity in obese adolescents. J Amer Coll Cardiol. 2004;43:1823–7.
•• Ziadi MC, Dekemp RA, Williams KA, Guo A, Chow BJW, Renaud JM, et al. Impaired myocardial flow reserve on rubidium-82 positron emission tomography imaging predicts adverse outcomes in patients assessed for myocardial ischemia. J Am Coll Cardiol. 2011;58:740–8. This study enrolled prospectively 704 patients with suspected and known CAD who underwent 82Rb- PET perfusion measurements and MFR calculation. The noninvasively calculated MFR predicted hard cardiac events and major adverse cardiac events independent of the presence of stress- induced myocardial perfusion defects and other parameters.
•• Herzog BA, Husmann L, Valenta I, Gaemperli O, Siegrist PT, Tay FM, et al. Long-term prognostic value of 13N-ammonia myocardial perfusion positron emission tomography added value of coronary flow reserve. J Am Coll Cardiol. 2009;54:150–6. This is a retrospectively performed study in 245 patients with suspicion for CAD. In patients with normal PET perfusion imaging the evaluation of the MFR proved to be a strong outcome predictor, whereas a reduced MFR in those with stress-induced perfusion defects improved the prediction of an adverse outcome.
Després JPLI. Abdominal obesity and metabolic syndrome. Nature. 2006;444:881–7.
Després JP, Lemieux I, Bergeron J, Pibarot P, Mathieu P, Larose E, et al. Abdominal obesity and the metabolic syndrome: contribution to global cardiometabolic risk. Arterioscler Thromb Vasc Biol. 2008;28:1039–49.
•• Gaborit B, Jacquier A, Kober F, Abdesselam I, Cuisset T, Boullu-Ciocca S, et al. Effects of bariatric surgery on cardiac ectopic fat: lesser decrease in epicardial fat compared with visceral fat loss and no change in myocardial triglyceride content. J Am Coll Cardiol. 2012;60:1381–9. Excellent investigation, which assessed the effects of bariatric surgery-induced weight loss on cardiac ectopic fat in comparison with visceral fat.
Karastergiou K, Evans I, Ogston N, Miheisi N, Nair D, Kaski JC, et al. Epicardial adipokines in obesity and coronary artery disease induce atherogenic changes in monocytes and endothelial cells. Arterioscler Thromb Vasc Biol. 2010;30:1340–6.
Mazurek T, Zhang L, Zalewski A, Mannion JD, Diehl JT, Arafat H, et al. Human epicardial adipose tissue is a source of inflammatory mediators. Circulation. 2003;108:2460–6.
Gaborit B, Kober F, Jacquier A, Moro PJ, Cuisset T, Boullu S, et al. Assessment of epicardial fat volume and myocardial triglyceride content in severely obese subjects: relationship to metabolic profile, cardiac function and visceral fat. Int J Obes. 2012;36:422–30.
• Gaborit B, Kober F, Jacquier A, Moro PJ, Flavian A, Quilici J, et al. Epicardial fat volume is associated with coronary microvascular response in healthy subjects: a pilot study. Obesity. 2012;20:1200–5. This study provides the first evidence of direct effects of epicardial fat on coronary arteriolar function.
Venteclef N, Guglielmi V, Balse E, Gaborit B, Cotillard A, Atassi F, et al. Human epicardial adipose tissue induces fibrosis of the atrial myocardium through the secretion of adipo-fibrokines. Eur Heart J. 2013. [Epub ahead of print].
Halberg N, Khan T, Trujillo ME, Wernstedt-Asterholm I, Attie AD, Sherwani S, et al. Hypoxia-inducible factor 1alpha induces fibrosis and insulin resistance in white adipose tissue. Mol Cell Biol. 2009;29:4467–83.
Hammer S, van der Meer RW, Lamb HJ, Schär M, de Roos A, Smit JW, Romijn JA. Progressive caloric restriction induces dose-dependent changes in myocardial triglyceride content and diastolic function in healthy men. J Clin Endocrinol Metab. 2008;93:497–503.
Acknowledgments
This work was supported by Research Grant 3200B0-122237 of the Swiss National Science Foundation (SNF), with contributions of the Clinical Research Center, University Hospital and Faculty of Medicine, Geneva, and the Louis-Jeantet Foundation, Gustave and Simone Prevot, and Swiss Heart Foundation, Switzerland.
Compliance with Ethics Guidelines
ᅟ
Conflict of Interest
Ines Valenta declares that she has no conflict of interest. Vasken Dilsizian declares that he has no conflict of interest. Alessandra Quercioli declares that she has no conflict of interest. Freimut D. Jüngling declares that he has no conflict of interest. Giuseppe Ambrosio is a member of the American College of Cardiology Committee on Cardiovascular Prevention. Richard Wahl declares that he has no conflict of interest. Thomas H. Schindler has received grant support from the Swiss National Research Foundation (SNF), the Swiss Heart Foundation, the Center of Clinical Research (Geneva), Prevot Foundation, and the Novartis Research Foundation.
Human and Animal Rights and Informed Consent
This article does not contain any studies with human or animal subjects performed by any of the authors.
Author information
Authors and Affiliations
Corresponding author
Additional information
This article is part of the Topical Collection on Nuclear Cardiology
Rights and permissions
About this article
Cite this article
Valenta, I., Dilsizian, V., Quercioli, A. et al. Impact of Obesity and Bariatric Surgery on Metabolism and Coronary Circulatory Function. Curr Cardiol Rep 16, 433 (2014). https://doi.org/10.1007/s11886-013-0433-8
Published:
DOI: https://doi.org/10.1007/s11886-013-0433-8