BACKGROUND: Pathogenesis of left ventricular hypertrophy (LVH) is multifactorial, but evidence that the sympathetic system is involved in progression of cardiovascular structural alterations in hypertension is substantial. However, the relationship between heart sympathetic activity and left ventricular mass in normotensive obese subjects has not been studied. METHODS: We studied 103 male normotensive subjects (53 obese and 50 non-obese). Left ventricular mass (LVM), heart sympathetic activity by 60 min electrocardiograph (EKG) monitoring, leptin, insulin, lipid profile, and blood pressure were measured. RESULTS: Obese subjects showed higher LVM (p=0.0002), low frequency/high frequency ratio (LF/HF) (p=0.004), systolic and diastolic blood pressure (p <0.00001 for both), insulin (p=0.00001), and leptin levels (p <0.00001) than non-obese subjects. In contrast, standard deviation (SD) of all rate-rhythm (R-R) intervals (SDNN) (p=0.0002) and total power (TP) (p=0.03) were lower in obese than in non-obese subjects. In multiple regression analysis for factors associated with LVM, body mass index (BMI) (R=0.24), systolic blood pressure (R=0.22), and LF/HF (R=0.21) were the only factors included in the model (R2=0.32, p <0.0001). CONCLUSIONS: LVM is increased in normotensive obese subjects and correlates with systolic blood pressure and heart sympathetic activity.
BACKGROUND: Pathogenesis of left ventricular hypertrophy (LVH) is multifactorial, but evidence that the sympathetic system is involved in progression of cardiovascular structural alterations in hypertension is substantial. However, the relationship between heart sympathetic activity and left ventricular mass in normotensive obese subjects has not been studied. METHODS: We studied 103 male normotensive subjects (53 obese and 50 non-obese). Left ventricular mass (LVM), heart sympathetic activity by 60 min electrocardiograph (EKG) monitoring, leptin, insulin, lipid profile, and blood pressure were measured. RESULTS:Obese subjects showed higher LVM (p=0.0002), low frequency/high frequency ratio (LF/HF) (p=0.004), systolic and diastolic blood pressure (p <0.00001 for both), insulin (p=0.00001), and leptin levels (p <0.00001) than non-obese subjects. In contrast, standard deviation (SD) of all rate-rhythm (R-R) intervals (SDNN) (p=0.0002) and total power (TP) (p=0.03) were lower in obese than in non-obese subjects. In multiple regression analysis for factors associated with LVM, body mass index (BMI) (R=0.24), systolic blood pressure (R=0.22), and LF/HF (R=0.21) were the only factors included in the model (R2=0.32, p <0.0001). CONCLUSIONS: LVM is increased in normotensive obese subjects and correlates with systolic blood pressure and heart sympathetic activity.
Authors: Juan Manuel Guízar-Mendoza; Norma Amador-Licona; Efrén Edgard Lozada; Leticia Rodriguez; María Gutiérrez-Navarro; Luis Antonio Dubey-Ortega; José Trejo-Bellido; José de Jesús Encarnación; María De la Cruz Ruiz-Jaramillo Journal: Pediatr Nephrol Date: 2006-08-15 Impact factor: 3.714
Authors: Mark T Waddingham; Amanda J Edgley; Hirotsugu Tsuchimochi; Darren J Kelly; Mikiyasu Shirai; James T Pearson Journal: World J Diabetes Date: 2015-07-10
Authors: P-A Paquette; D Duguay; R El-Ayoubi; A Menaouar; B Danalache; J Gutkowska; D DeBlois; S Mukaddam-Daher Journal: Br J Pharmacol Date: 2007-12-03 Impact factor: 8.739