scholarly journals Left Ventricular Myocardial T1 Values and Extracellular Volume Fraction in Asymptomatic Subjects: Variations According to Left Ventricular Segments and Correlation with Cardiovascular Risk Factors

2021 ◽  
Author(s):  
Moon Young Kim ◽  
Soo Jin Cho ◽  
Hae Jin Kim ◽  
Sung Mok Kim ◽  
Sang-Chol Lee ◽  
...  
Keyword(s):  
Risk Factors ◽  
Renal Function ◽  
Cardiovascular Risk ◽  
Cardiovascular Risk Factors ◽  
Volume Fraction ◽  
Extracellular Volume ◽  
Extracellular Volume Fraction ◽  
Left Ventricular ◽  
Myocardial T1 ◽  
Asymptomatic Subjects

Abstract Purpose: To evaluate the normal range and variation in pre-contrast (preT1) and post-contrast (postT1) myocardial T1 values and extracellular volume fraction (ECV) according to left ventricular (LV) segments and to check for correlations between them and known cardiovascular risk factors.Methods: This study included 233 asymptomatic subjects (210 men and 23 women; aged 54.1±6.0 years) who underwent cardiac magnetic resonance imaging with preT1 and postT1 mapping on a 1.5-T scanner. T1 values and ECVs were compared among LV segments, age groups, and sex, and correlated with renal function. Based on the presence of hypertension (HTN) and diabetes mellitus (DM), the subjects were subdivided into the control (n=121), HTN (n=58), DM (n=25), and HTN and DM (HTN-DM) groups (n=29).Results: T1 values and ECV showed significant differences between the basal septal and lateral segments (p≤0.001) and between the mid-septal and mid-lateral segments (PreT1 p≤0.003, postT1 and ECV p<0.001). Among subgroups according to the HTN and DM status, the HTN-DM group showed a significantly higher ECV (0.260±0.023) than the control (0.240±0.021, p=0.011) and HTN (0.241±0.024, p=0.041) groups. Overall postT1 and ECV of the LV had significant correlation with the estimated glomerular filtration rate (r = 0.19, p=0.038 for postT1; r = -0.23, p=0.011 for ECV).Conclusion: Septal segments show higher preT1 and ECV but lower postT1 than lateral segments at the mid-ventricular and basal levels. ECV is significantly affected by cardiovascular risk factors such as HTN, DM, and decreased renal function, even in asymptomatic subjects.

scholarly journals The Prognostic Value of Early Left Ventricular Longitudinal Systolic Dysfunction in Asymptomatic Subjects With Cardiovascular Risk Factors

2011 ◽  
Vol 34 (8) ◽  
pp. 500-506 ◽  
Author(s):  
Giovanni Di Salvo ◽  
Vitantonio Di Bello ◽  
Alessandro Salustri ◽  
Francesco Antonini-Canterin ◽  
Salvatore La Carrubba ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cardiovascular Risk ◽  
Cardiovascular Risk Factors ◽  
Prognostic Value ◽  
Systolic Dysfunction ◽  
Left Ventricular ◽  
Asymptomatic Subjects

Association of cardiovascular risk factors on myocardial perfusion and fibrosis in asymptomatic individuals: cardiac magnetic resonance study

2018 ◽  
Vol 59 (11) ◽  
pp. 1300-1308 ◽  
Author(s):  
Min Jae Cha ◽  
Sung Mok Kim ◽  
Hyun Su Kim ◽  
Yiseul Kim ◽  
Yeon Hyeon Choe
Keyword(s):  
Risk Factors ◽  
Cardiovascular Risk ◽  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Myocardial Perfusion ◽  
Cardiovascular Risk Factors ◽  
Volume Fraction ◽  
Left Ventricular ◽  
Coronary Microvascular Dysfunction ◽  
Asymptomatic Individuals

Background Myocardial perfusion reserve index (MPRI) and extracellular volume fraction (ECV) on cardiac magnetic resonance (CMR) are known to quantify coronary microvascular dysfunction and myocardial fibrosis, respectively. Purpose To demonstrate that cardiovascular risk factors such as hypertension, diabetes, hyperlipidemia, and smoking are correlated with MPRI and ECV on CMR in asymptomatic individuals. Material and Methods Between October 2013 and July 2014, 196 individuals underwent CMR. After excluding those with chest pain, arrhythmia, and obstructive coronary artery disease, participants were divided into five groups: those without risk factor (n = 26) and those with one (n = 43), two (n = 35), three (n = 24), or four (n = 6) risk factors. MPRI and ECV were obtained on perfusion CMR and pre- and post-T1 mapping, respectively. Results A total of 134 asymptomatic individuals (109 men, 25 women; mean age = 54.4 ± 7.08 years; body mass index [BMI] = 24.96 ± 2.76 kg/m2; Framingham risk score [FRS] = 7.71 ± 5.21) were included. The Jonckheere-Terpstra test demonstrated trends of increasing BMI, FRS, and left ventricular mass index (all P values < 0.001), but decreasing MPRI ( P = 0.001) with increasing numbers of risk factors. Stepwise multiple linear regression demonstrated that an increasing number of cardiovascular risk factors was an independent predictor of MPRI ( P = 0.001). However, there was no significant association between the number of risk factors and ECV ( P = 0.99). Conclusion We demonstrated that an increasing number of cardiovascular risk factors is significantly associated with reduced MPRI, but not with ECV on CMR.

scholarly journals Effects of age, gender, and risk-factors for heart failure on native myocardial T1 and extracellular volume fraction using the SASHA sequence at 1.5T

2018 ◽  
Vol 48 (5) ◽  
pp. spcone-spcone
Author(s):  
Joseph J. Pagano ◽  
Kelvin Chow ◽  
D. Ian Paterson ◽  
Yoko Mikami ◽  
Anna Schmidt ◽  
...  
Keyword(s):  
Risk Factors ◽  
Heart Failure ◽  
Volume Fraction ◽  
Extracellular Volume ◽  
Extracellular Volume Fraction ◽  
Myocardial T1

SURVEY OF CARDIOVASCULAR RISK FACTORS AND ELECTROCARDIGRAPHIC, ECHOCARDIOGRAPHIC ABNORMALITIES IN PATIENTS ON WAITING LIST FOR RENAL TRANSPLANTATION

2014 ◽  
pp. 26-30
Author(s):  
Huu Thinh Nguyen ◽  
Thi Thuy Hang Nguyen ◽  
Bui Bao Hoang
Keyword(s):  
Risk Factors ◽  
Cardiovascular Risk ◽  
Renal Transplantation ◽  
Left Ventricular Hypertrophy ◽  
Cardiovascular Risk Factors ◽  
Ventricular Hypertrophy ◽  
Left Ventricular ◽  
Valve Insufficiency ◽  
Transplant Candidates ◽  
End Stage

Background: Cardiovascular disease is the major cause of death in dialysis patients, as well as in kidney transplant patients. Assessment of cardiovascular risks of renal transplant candidates to prevent or slow the progression of cardiovascular abệnh nhânormalities. Aim: 1) Evaluating cardiovascular risk factors, electrocardiographic and echocardiographic abnormalities in renal transplant candidates. 2) Identifying the correlation between cardiac morphological parameters with a number of factors involved. Subjects and Methods: We assessed 57 patients (73.7% male, mean age 32.4±8.8) with end-stage renal disease waiting for renal transplantation at Cho Ray Hospital between Jan 2012 and Jan 2013. All patients received a physical examination, blood pressure measurement, Hb, blood glucose test, lipid profile, ECG, echocardiography. Results: The percentage of hypertension was 98.2%, smoking (69.2%), dyslipidemia 40.4% and diabetes 12.3%. All patients had sinus rhythm, left ventricular hypertrophy 61.4% in ECG. Pericardial effusion 5.3%, mitral valve insufficiency 56.1%, aortic valve insufficiency 12.3%, left ventricular hypertrophy 94.7% in echocardiography. IVSd, LVPWd, LVMI positively correlated with kidney failure time (p <0.01, p<0.001), with DBP and SBP (p <0.05) and the degree of anemia (p <0.05). Percentage the degree of hypertension associated with proportion of left ventricular hypertrophy (p <0.05). Conclusions: Identification of cardiovascular risk factors for the prevention or intervention to reduce mortality in renal transplantation. Keywords: Cardiovascular risk factors, end-stage chronic renal failure, renal transplantation.

Investigation of the prevalence of cardiovascular risk factors in obese patients diagnosed with metabolic syndrome in childhood and examination of left ventricular function by echocardiography

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Güzin Özden ◽  
Ayşe Esin Kibar Gül ◽  
Eda Mengen ◽  
Ahmet Ucaktürk ◽  
Hazım Alper Gürsu ◽  
...  
Keyword(s):  
Risk Factors ◽  
Insulin Resistance ◽  
Blood Pressure ◽  
Metabolic Syndrome ◽  
Cardiovascular Risk ◽  
Cardiovascular Risk Factors ◽  
Left Ventricular ◽  
Atherogenic Index ◽  
Volume Index ◽  
Common Component

Abstract Objectives The objective of this study is to investigate the cardiovascular risk factors associated with metabolic syndrome (MetS), which is increasingly becoming prevalent in childhood obesity. Methods A total of 113 patients, 76 of whom were between the ages of 10 and 17 (mean age: 14.5 ± 1.8 years) and diagnosed with obesity (30 non-MetS and 46 MetS using IDF) and 37 of whom constituted the control group, participated in the study. Echocardiographic examination and atherogenicity parameters (Atherogenic index of plasma [AIP: logTG/HDL], total cholesterol/HDL, and TG/HDL ratio and non-HDL) were evaluated. Results The most common component accompanying obese MetS was found to be hypertension and low HDL. While obesity duration, body mass index (BMI), blood pressure, fasting insulin, insulin resistance, atherogenicity parameters were determined to be significantly higher in the obese-MetS group. Echocardiography showed that while the thickness, volume, and diameter of LV end-diastolic wall, left ventricular mass (LVM), LVM index (LVMI g/m2) and relative wall thickness (RWT) were significantly high in the MetS group, however, mitral E/A ratio was significantly lower (p<0.05). Change in LV geometry consistent with concentric remodeling (increased RWT, normal LVMI) was visible in obese groups. LVM were positively significantly related to BMI, waist circumference, insulin resistance, blood pressure, LDL level, and negative to mitral E/A ratio. In the obese-MetS group, LVMI was positively correlated to office systolic BP, left atrium end-diastolic volume/index. Conclusions LVMI and atherogenicity parameters that were found to be significantly higher in obese MetS exhibit increased cardiovascular risk in childhood.

Transmural heterogeneity of diffusion anisotropy in the sheep myocardium characterized by MR diffusion tensor imaging

2007 ◽  
Vol 293 (4) ◽  
pp. H2377-H2384 ◽  
Author(s):  
Yi Jiang ◽  
Julius M. Guccione ◽  
Mark B. Ratcliffe ◽  
Edward W. Hsu
Keyword(s):  
Diffusion Tensor Imaging ◽  
Volume Fraction ◽  
Diffusion Tensor ◽  
Extracellular Volume ◽  
Extracellular Volume Fraction ◽  
Left Ventricular ◽  
Fiber Direction ◽  
Significant Difference ◽  
Mr Diffusion ◽  
Mr Diffusion Tensor Imaging

The orientation of MRI-measured diffusion tensor in the myocardium has been directly correlated to the tissue fiber direction and widely characterized. However, the scalar anisotropy indexes have mostly been assumed to be uniform throughout the myocardial wall. The present study examines the fractional anisotropy (FA) as a function of transmural depth and circumferential and longitudinal locations in the normal sheep cardiac left ventricle. Results indicate that FA remains relatively constant from the epicardium to the midwall and then decreases (25.7%) steadily toward the endocardium. The decrease of FA corresponds to 7.9% and 12.9% increases in the secondary and tertiary diffusion tensor diffusivities, respectively. The transmural location of the FA transition coincides with the location where myocardial fibers run exactly circumferentially. There is also a significant difference in the midwall-endocardium FA slope between the septum and the posterior or lateral left ventricular free wall. These findings are consistent with the cellular microstructure from histological studies of the myocardium and suggest a role for MR diffusion tensor imaging in characterization of not only fiber orientation but, also, other tissue parameters, such as the extracellular volume fraction.

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