Doppler myocardial imaging in the diagnosis of early systolic left ventricular dysfunction in diabetic rats. 2008

Caroline Weytjens, and Philippe R Franken, and Jan D'hooge, and Steven Droogmans, and Bernard Cosyns, and T Lahoutte, and Guy Van Camp
Department of Cardiology, In Vivo Cellular and Molecular Imaging Center, University Hospital, Brussels, Belgium. igwsc@uzbrussel.be <igwsc@uzbrussel.be>

OBJECTIVE To find out if Doppler myocardial imaging (DMI) can detect early signs of left ventricular (LV) dysfunction in a rat model of diabetic cardiomyopathy. METHODS Eight control and 12 Streptozotocin (STZ)-induced diabetic rats underwent transthoracic echocardiography with high-resolution technology at baseline and 2, 4, 8, 12, and 16 weeks after STZ injection. Radial function was analysed using conventional M-mode, and velocity, strain and strain rate imaging. Longitudinal function was analysed using pulsed Doppler imaging of the mitral annulus. RESULTS In the diabetic rats, a significant increase in LV end diastolic and end systolic diameter was measured when compared with controls (P < 0.001). Fractional shortening and LV ejection fraction remained unchanged in both groups. Using DMI, diabetic rats demonstrated a decrease in radial systolic velocity (rate of change: +0.01 vs. -0.003 week(-1); P < 0.01) and radial systolic strain rate (+0.003 vs. -0.205 week(-1); P = 0.08) of the anteroseptal wall. Histologic examination revealed dilated cardiomyopathy with no signs of fibrosis. CONCLUSIONS Although LV ejection fraction remained preserved, velocity and strain rate imaging was able to detect radial systolic dysfunction in diabetic rats. The absence of histological signs of fibrosis suggests that other mechanisms play a role in the development of diabetic cardiomyopathy.

UI MeSH Term Description Entries
D008297 Male Males
D009202 Cardiomyopathies A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS). Myocardial Disease,Myocardial Diseases,Myocardial Diseases, Primary,Myocardial Diseases, Secondary,Myocardiopathies,Primary Myocardial Disease,Cardiomyopathies, Primary,Cardiomyopathies, Secondary,Primary Myocardial Diseases,Secondary Myocardial Diseases,Cardiomyopathy,Cardiomyopathy, Primary,Cardiomyopathy, Secondary,Disease, Myocardial,Disease, Primary Myocardial,Disease, Secondary Myocardial,Diseases, Myocardial,Diseases, Primary Myocardial,Diseases, Secondary Myocardial,Myocardial Disease, Primary,Myocardial Disease, Secondary,Myocardiopathy,Primary Cardiomyopathies,Primary Cardiomyopathy,Secondary Cardiomyopathies,Secondary Cardiomyopathy,Secondary Myocardial Disease
D004195 Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases. Animal Disease Model,Animal Disease Models,Disease Model, Animal
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013599 Systole Period of contraction of the HEART, especially of the HEART VENTRICLES. Systolic Time Interval,Interval, Systolic Time,Intervals, Systolic Time,Systoles,Systolic Time Intervals,Time Interval, Systolic,Time Intervals, Systolic
D015150 Echocardiography, Doppler Measurement of intracardiac blood flow using an M-mode and/or two-dimensional (2-D) echocardiogram while simultaneously recording the spectrum of the audible Doppler signal (e.g., velocity, direction, amplitude, intensity, timing) reflected from the moving column of red blood cells. Doppler Echocardiography,Echocardiography, Continuous Doppler,Echocardiography, Two-Dimensional Doppler,2-D Doppler Echocardiography,2D Doppler Echocardiography,Continuous Doppler Echocardiography,Doppler Echocardiography, 2-D,Doppler Echocardiography, 2D,Doppler Echocardiography, Continuous,Doppler Echocardiography, Two-Dimensional,Echocardiography, 2-D Doppler,Echocardiography, 2D Doppler,Two-Dimensional Doppler Echocardiography,2 D Doppler Echocardiography,Doppler Echocardiography, 2 D,Doppler Echocardiography, Two Dimensional,Echocardiography, 2 D Doppler,Echocardiography, Two Dimensional Doppler,Two Dimensional Doppler Echocardiography
D017208 Rats, Wistar A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain. Wistar Rat,Rat, Wistar,Wistar Rats
D048909 Diabetes Complications Conditions or pathological processes associated with the disease of diabetes mellitus. Due to the impaired control of BLOOD GLUCOSE level in diabetic patients, pathological processes develop in numerous tissues and organs including the EYE, the KIDNEY, the BLOOD VESSELS, and the NERVE TISSUE. Complications of Diabetes Mellitus,Diabetes-Related Complications,Diabetic Complications,Diabetes Complication,Diabetes Mellitus Complication,Diabetes Mellitus Complications,Diabetes Related Complications,Diabetes-Related Complication,Diabetic Complication
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus
D018487 Ventricular Dysfunction, Left A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall. LV Diastolic Dysfunction,LV Dysfunction,LV Systolic Dysfunction,Left Ventricular Diastolic Dysfunction,Left Ventricular Dysfunction,Left Ventricular Systolic Dysfunction,Diastolic Dysfunction, LV,Dysfunction, LV,Dysfunction, LV Diastolic,Dysfunction, LV Systolic,Dysfunction, Left Ventricular,LV Diastolic Dysfunctions,LV Dysfunctions,LV Systolic Dysfunctions,Left Ventricular Dysfunctions,Systolic Dysfunction, LV

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