Format

Send to

Choose Destination
Cardiology. 2016;133(3):157-62. doi: 10.1159/000441276. Epub 2015 Nov 24.

Noninvasive Detection of Early Metabolic Left Ventricular Remodeling in Systemic Hypertension.

Author information

1
Cardiovascular Division, Department of Medicine, University of Virginia Health System, Charlottesville, Va., USA.

Abstract

OBJECTIVES:

Hypertension (HTN) is a common cause of left ventricular hypertrophy (LVH). Sustained pressure overload induces a permanent myocardial switch from fatty-acid to glucose metabolism. In this study, we tested the hypothesis that metabolic remodeling, characterized by increased myocardial glucose uptake, precedes structural and functional remodeling in HTN-induced LVH.

METHODS:

We recruited 31 patients: 11 with HTN only, 9 with HTN and LVH and 11 normotensive controls without LVH. Transthoracic echocardiography was performed to assess the function, mass, wall thickness and diastolic function of the left ventricle. Positron emission tomography imaging was performed, and the rate of myocardial 2-deoxy-2-[18F]fluoro-D-glucose uptake, Ki, was determined using a 3-compartment kinetic model.

RESULTS:

The mean Ki values were significantly higher in HTN patients than in those with HTN and LVH (p < 0.001) and in controls (p = 0.003). The unexpected decrease in Ki with LVH may be secondary to a decreased Ki with diastolic dysfunction (DD), 0.039 ± 0.032 versus 0.072 ± 0.013 (p = 0.004). There was also a significant stepwise decrease in Ki with increasing DD grade (p = 0.04).

CONCLUSION:

Glucose metabolic remodeling is detectable in hypertensive patients before the development of LVH. Furthermore, lower glucose uptake rates are observed in patients with DD. The mechanism for this last finding requires further investigation.

Comment in

PMID:
26594908
PMCID:
PMC4677787
DOI:
10.1159/000441276
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for S. Karger AG, Basel, Switzerland Icon for PubMed Central
Loading ...
Support Center