246 220

Cited 14 times in

Extent of Late Gadolinium Enhancement on Cardiovascular Magnetic Resonance Imaging and Its Relation to Left Ventricular Longitudinal Functional Reserve During Exercise in Patients With Hypertrophic Cardiomyopathy

 Jeonggeun Moon  ;  Yoo Jin Hong  ;  Young-Jin Kim  ;  Chi Young Shim  ;  Yangsoo Jang  ;  Namsik Chung  ;  Seung-Yun Cho  ;  Jong-Won Ha 
 CIRCULATION JOURNAL, Vol.77(7) : 1742-1749, 2013 
Journal Title
Issue Date
Cardiomegaly*/diagnostic imaging ; Cardiomegaly*/physiopathology ; Contrast Media/administration & dosage* ; Exercise* ; Female ; Gadolinium/administration & dosage* ; Humans ; Magnetic Resonance Imaging/methods* ; Male ; Middle Aged ; Radiography ; Ventricular Function, Left*
Echocardiography ; Exercise ; Hypertrophic cardiomyopathy ; Left ventricular function ; Magnetic resonance imaging
BACKGROUND: The aim of this study was to investigate whether the extent of late gadolinium enhancement (LGE) on cardiovascular magnetic resonance imaging reflecting myocardial fibrosis correlates with left ventricular (LV) longitudinal function during exercise in hypertrophic cardiomyopathy (HCM). METHODS AND RESULTS: Mitral annular velocities (E' and S') were measured on echocardiography at rest and during graded bicycle exercise (25 W, 3-min increments) in 46 HCM patients (mean age, 53 years; 32 men). LV longitudinal diastolic and systolic functional reserve indices were calculated as ΔE'×E'base and ΔS'×S'base, where ΔE' and ΔS' are the changes in E' and S' from baseline to 50 W of exercise, respectively. The patients were divided into 2 groups according to the extent of LGE (as "percentage of LV mass containing LGE": %LV with LGE; range, 0-37%; median, 6%): group 1 (n=23), %LV with LGE <6%, and group 2, %LV with LGE ≥6%. Baseline echocardiographic parameters were similar between the 2 groups, but changes in E' and S' during exercise were smaller in group 2 (ΔE': 2.8±1.8 cm/s vs.1.5±1.0 cm/s, P=0.007; ΔS': 2.2±1.2 cm/s vs. 0.9±0.8 cm/s, P<0.0001). LV functional reserve indices were also significantly lower in group 2 (ΔE'×E'(base): 12.8±7.7 vs. 5.5±3.4, P=0.001; ΔS'×S'(base): 12.6±7.4 vs. 4.7±4.5, P<0.0001). CONCLUSIONS: LV longitudinal function during exercise is influenced by the extent of LGE in HCM. Myocardial fibrosis may represent a pathologic substrate that determines LV functional reserve in patients with HCM.
Files in This Item:
T201302354.pdf Download
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Young Jin(김영진) ORCID logo https://orcid.org/0000-0002-6235-6550
Shim, Chi Young(심지영) ORCID logo https://orcid.org/0000-0002-6136-0136
Jang, Yang Soo(장양수) ORCID logo https://orcid.org/0000-0002-2169-3112
Chung, Nam Sik(정남식)
Cho, Seung Yun(조승연)
Ha, Jong Won(하종원) ORCID logo https://orcid.org/0000-0002-8260-2958
Hong, Yoo Jin(홍유진) ORCID logo https://orcid.org/0000-0002-7276-0944
사서에게 알리기


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.