Covariables of Myocardial Function in Women and Men with Increased Body Mass Index

Nadia Pristaj, Sahrai Saeed, Helga Midtbø, Hilde Halland, Knut Matre, Eva Gerdts, Nadia Pristaj, Sahrai Saeed, Helga Midtbø, Hilde Halland, Knut Matre, Eva Gerdts

Abstract

Introduction: Sex-difference in types of cardiac organ damage has been reported in subjects with increased body mass index (BMI). However less is known about sex-differences in left ventricular (LV) myocardial function assessed by global longitudinal strain (GLS) in these subjects.

Methods: 493 subjects (mean age 47 ± 9 years, 61% women) with BMI > 27.0 kg/m2 and without known cardiac disease underwent 24-hour (24h) ambulatory blood pressure (BP) recording, body composition analysis, carotid-femoral pulse wave velocity (PWV) measurement and echocardiography. LV peak systolic GLS was measured by two-dimensional speckle tracking echocardiography and LV ejection fraction (EF) by biplane Simpson's method. Insulin sensitivity was assessed by homeostatic model of insulin resistance (HOMA-IR).

Results: Women had higher prevalence of increased waist circumference (99% vs. 82%), lower prevalence of hypertension (59 vs. 74%), and lower serum triglycerides (1.3 ± 0.7 vs. 1.7 ± 0.9 mmol/L) and carotid-femoral PWV (7.3 ± 1.6 vs. 7.7 ± 1.6 m/s) compared to men (all p < 0.05). Women also had higher (more negative) GLS compared to men (- 19.9 ± 3.0 vs. - 18.6 ± 3.0%, p < 0.001), while EF did not differ between sexes. In multivariable linear regression analyses, lower GLS in women was associated with higher waist circumference and PWV and with lower EF (all p < 0.05). In men, lower GLS was associated with higher waist circumference and HOMA-IR, and with lower EF (all p < 0.05).

Conclusions: Among subjects with increased BMI, GLS was higher in women than men. Lower GLS was associated with abdominal obesity in both sexes, and with impaired glucose metabolism in men, and with higher arterial stiffness in women.

Trial registration: https://www.clinicaltrials.gov NCT02805478, first registered 20.06.16.

Keywords: Arterial stiffness; Global longitudinal strain; Hypertension; Obesity; Sex.

Conflict of interest statement

The authors have no conflicts of interest to disclose.

Figures

Figure 1
Figure 1
The association of myocardial function assessed by LV GLS with serum triglycerides (a) and C-peptide (b) in women and men

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