Increased left ventricular torsion in uncomplicated type 1 diabetic patients: the role of coronary microvascular function

Ganesh Nallur Shivu, Khalid Abozguia, Tranh Trung Phan, Irfan Ahmed, Rebekah Weaver, Parth Narendran, Martin Stevens, Michael Frenneaux

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OBJECTIVE - We used speckle tracking echocardiography to study the early changes in left ventricular (LV) torsion in young patients with uncomplicated type 1 diabetes and stress magnetic resonance imaging (MRI) to assess its interrelationships with coronary microangiopathy.

RESEARCH DESIGN AND METHODS - We recruited 33 asymptomatic subjects with type 1 diabetes and 32 age-matched healthy control subjects. All subjects underwent echocardiograms. Stress MRIs were performed in 30 subjects (8 healthy control subjects) to compute myocardial perfusion reserve index (MPRI).

RESULTS - A significant increase in LV torsion (2 +/- 0.7 vs. 1.4 +/- 0.7 degrees/cm, P < 0.05) was identified in longer-term and retinopathy-positive type 1 diabetic subjects (1.9 +/- 0.7 vs. 1.4 +/- 0.7 degrees/cm, P < 0.05) as compared with the healthy control subjects. The MPRI was independently associated with increased LV torsion.

CONCLUSIONS - We demonstrate that LV torsion is increased in young patients with uncomplicated type I diabetes and that coronary microvascular disease may play a key pathophysiological role in the development of increased LV torsion.

Original languageEnglish
Pages (from-to)1710-1712
Number of pages3
JournalDiabetes Care
Issue number9
Publication statusPublished - Sep 2009


  • speckle-tracking echocardiography
  • diastolic dysfunction
  • myocardial-perfusion
  • fraction
  • reserve

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