Myocardial steatosis and biventricular strain and strain rate imaging in patients with type 2 diabetes mellitus

ACT Ng, V Delgado, M Bertini, RW van der Meer… - Circulation, 2010 - Am Heart Assoc
ACT Ng, V Delgado, M Bertini, RW van der Meer, LJ Rijzewijk, S Hooi Ewe, HM Siebelink…
Circulation, 2010Am Heart Assoc
Background—Magnetic resonance spectroscopy can quantify myocardial triglyceride
content in type 2 diabetic patients. Its relation to alterations in left (LV) and right (RV)
ventricular myocardial functions is unknown. Methods and Results—A total of 42 men with
type 2 diabetes mellitus were recruited. Exclusion criteria included hemoglobin A1c> 8.5,
known cardiovascular disease, diabetes-related complications, or blood pressure> 150/85
mm Hg. Myocardial ischemia was excluded by a negative dobutamine stress test. LV and …
Background
Magnetic resonance spectroscopy can quantify myocardial triglyceride content in type 2 diabetic patients. Its relation to alterations in left (LV) and right (RV) ventricular myocardial functions is unknown.
Methods and Results
A total of 42 men with type 2 diabetes mellitus were recruited. Exclusion criteria included hemoglobin A1c >8.5, known cardiovascular disease, diabetes-related complications, or blood pressure >150/85 mm Hg. Myocardial ischemia was excluded by a negative dobutamine stress test. LV and RV volumes and ejection fraction were quantified by magnetic resonance imaging. LV global longitudinal and RV free wall longitudinal strain, systolic strain rate, and diastolic strain rate were quantified by echocardiographic speckle tracking analyses. Myocardial triglyceride content was quantified by magnetic resonance spectroscopy and dichotomized on the basis of the median value of 0.76. The median age was 59 years (25th and 75th percentiles, 54 and 62 years). Median diabetes diagnosis duration was 4 years, and median glycohemoglobin level was 6.2 (25th and 75th percentiles, 5.9 and 6.8). There were no differences in LV and RV end-diastolic and end-systolic volume indexes and ejection fraction between patients with high (≥0.76) and those with low (<0.76) myocardial triglyceride content. However, patients with high myocardial triglyceride content had greater impairment of LV and RV myocardial strain and strain rate. The myocardial triglyceride content was an independent correlate of LV and RV longitudinal strain, systolic strain rate, and diastolic strain rate.
Conclusions
High myocardial triglyceride content is associated with more pronounced impairment of LV and RV functions in men with uncomplicated type 2 diabetes mellitus.
Am Heart Assoc