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Relationship between serum biochemical markers of myocardial fibrosis and diastolic function at rest and with exercise in hypertrophic cardiomyopathy

Authors
 Chi Young Shim  ;  Jong-Won Ha  ;  Eui-Young Choi  ;  Hyun-Jin Lee  ;  Sun-Ha Moon  ;  Jin-Mi Kim  ;  Se-Joong Rim  ;  Namsik Chung 
Citation
 KOREAN CIRCULATION JOURNAL, Vol.39(12) : 519-524, 2009 
Journal Title
KOREAN CIRCULATION JOURNAL
ISSN
 1738-5520 
Issue Date
2009
Keywords
Cardiomyopathy hypertrophic ; Collagen ; Exercise ; Myocardial contraction, diastole
Abstract
BACKGROUND AND OBJECTIVES: Recent studies have demonstrated the usefulness of biochemical markers of collagen turnover as markers of myocardial fibrosis in various diseases. In this study, we hypothesized that increased collagen markers in patients with hypertrophic cardiomyopathy (HCM) were correlated with diastolic function at rest and diastolic functional reserve during exercise.

SUBJECTS AND METHODS: Thirty-six patients with HCM and 21 controls with normal left ventricular thickness were studied. Mitral septal annular velocities and mitral inflow velocities were measured at rest and during graded supine bicycle exercise (25 W, 3-minute increments) for the assessment of diastolic function at rest and during exercise. By radioimmunoassay, a byproduct of collagen III synthesis (PIIINP) and peptides resulting from collagen I synthesis (PINP) and degradation (ICTP) were measured. The patients with HCM were divided into two groups according to the median value of the PINP/ICTP ratio in the group.

RESULTS: At rest, the mitral annular early diastolic velocity (E') was lower and the E/E' was higher in the patients with HCM with high a PINP/ICTP ratio compared with patients with HCM with a low PINP/ICTP ratio and controls (p<0.001, p=0.012). With exercise, the Doppler parameters were increased in all groups, but there was no significant difference in the change in E' and E/E' during exercise according to collagen turnover markers.

CONCLUSION: A higher PINP/ICTP ratio was associated with resting diastolic dysfunction in patients with HCM; however, there was no relationship with augmented diastolic dysfunction during exercise. We suggest that the type I collagen synthesis-to-degradation ratio is a useful marker of resting diastolic function in patients with HCM.
Files in This Item:
T200905280.pdf Download
DOI
10.4070/kcj.2009.39.12.519
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Shim, Chi Young(심지영) ORCID logo https://orcid.org/0000-0002-6136-0136
Rim, Se Joong(임세중) ORCID logo https://orcid.org/0000-0002-7631-5581
Chung, Nam Sik(정남식)
Choi, Eui Young(최의영) ORCID logo https://orcid.org/0000-0003-3732-0190
Ha, Jong Won(하종원) ORCID logo https://orcid.org/0000-0002-8260-2958
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/105827
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