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Volume-time curve of cardiac magnetic resonance assessed left ventricular dysfunction in coronary artery disease patients with type 2 diabetes mellitus

Session Poster session 6

Speaker Xu Huayan

Congress : EuroEcho 2016

  • Topic : imaging
  • Sub-topic : Echocardiography
  • Session type : Poster Session
  • FP Number : P1227

Authors : X Huayan (Chengdu,CN), YANG Zhigang (Chengdu,CN), GUO Yingkun (Cheng du,CN), CHEN Jing (Chengdu,CN)

X Huayan1 , YANG Zhigang1 , GUO Yingkun2 , CHEN Jing1 , 1West China Hospital Sichuan University, Radiology - Chengdu - China People's Republic of , 2West China Second University Hospital, Sichuan University, , Department of Radiology - Cheng du - China People's Republic of ,

On behalf: No.

European Heart Journal Supplements ( 2016 ) 17 ( Supplement 2 ), ii257

Purpose: Type 2 diabetes mellitus (DM2) may induce epicardial coronary artery diseases and left ventricular myocardial damaging as well. Left ventricular dysfunction was found in DM2.In this research, we compared the left ventricular dysfunction of coronary artery disease (CAD) patients with and without type 2 diabetes mellitus using the volume-time curve of cardiac magnetic resonance (CMR).

Materials and Methods:Six-one CAD patients (28 with DM2 and 33 without DM2) and 20 normal individuals were enrolled in this study. Left ventricular function parameters, including the end-diastolic and end-systolic volumes (EDV, ESV), stroke volume (SV) and ejection fraction (EF), and morphologic dimension parameters (end diastolic and systolic diameter (EDD and ESD), were measured and compared. Volume-time curve parameters, including the peak ejection rate (PER), peak ejection time (PET), peak filling rate (PFR), peak filling time from ES (PFT), peak ejection rate normalized to EDV (PER/EDV), and peak filling rate normalized to EDV (PFR /EDV), were derived automatically and compared.

Results: LVEF in the diabetic CAD group was markedly reduced when compared to the normal and CAD without DM2 groups (all p < 0.05). LVEDD of the diabetic CAD group was significantly enlarged compared to the normal and non-diabetic CAD groups (all p < 0.05). More importantly, the lowest parameters of the left ventricle volume time curve (i.e., PER, PFR, PER/EDV and PFR/EDV) were obtained in diabetic CAD patients (all p < 0.05).  In diabetic CAD patients, logistic regression analysis indicated that PET, PFT and PFR/EDV were independent predictors of left ventricular dysfunction (odds ratio [OR]: 1.1208, 1.0161, and 0.0139, respectively). The sensitivity and specificity of PET were 81.2% and 90%, respectively, when the threshold value was greater than 164.4 msec; for PFT, the sensitivity and specificity were 87.5% and 95.0%, respectively (criterion > 166.0 msec). Higher sensitivity (87.5%) and specificity (100.0%) were obtained for PFR/EDV (criterion = 3.7EDV/sec).

Conclusions: Parameters that are derived from the volume-time curve on CMR, including PET, PFT and PFR/EDV, allow clinicians to predict left ventricular dysfunction in diabetic CAD subjects with a high degree of sensitivity and specificity.

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