1.1H-MRS STUDY ON GENDER DIFFERENCES IN INTRAMUSCULAR TRIGLYCERIDES IN HUMAN SKELETAL MUSCLE AND THEIR RELATION TO BODY FAT AND ENDURANCE CAPACITY
YOSHINAO NAKAGAWA ; MASAAKI HATTORI ; KUNIAKI HARADA ; MICHIO BANDO ; GOROH OKANO
Japanese Journal of Physical Fitness and Sports Medicine 2003;52(2):149-157
Gender differences were measured in the amount of intramyocellular triglyceride (IMCL) and extramyocellular triglyceride (EMCL) in skeletal muscles using1H-MR spectroscopy and their relation to body fat and peak VO2was studied. Fourteen apparently healthy subjects were separated into groups by gender. Both the male and female group subjects were selected according to similar ages and BMI (male: n=7, BMI=20.5±0.6 kg/m2, age=21.1±0.7 years, female: n=7, BMI=20.6±0.5 kg/m2, age=18.7±0.3 years) . We found a significant correlation between IMCL and EMCL in the soleus (SQL: p<0.01) and medial gastrocnemius (MG: p<0.01) muscles. IMCL values in SQL were significantly higher than IMCL values in MG and tibialis anterior muscle (TA) in both males and females in the order of SQL>MG>TA (p<0.01) .
IMCL and EMCL values in MG and SQL among females were significantly higher (p<0.01) than their corresponding values in males. However, a gender difference in IMCL and EMCL values for TA was not found. There was no correlation between IMCL and EMCL values for each muscle and BMI ; but IMCL (r=0.63 in SQL) and EMCL (r=0.88 and r=0.73 in SQL, and MG, respectively; p< 0.01) values correlated significantly with percent FAT. There was no correlation between IMCL values for each muscle and peak VO2; but the EMCL values of SQL correlated quite negatively with peak VO2 (r=-0.63, p<0.05) . These results suggest that there are gender differences in intramyocellular and extramyocellular triglyceride contents. Lipids were positively related to percent body fat in SQL and MG; EMCL values may have a negative effect on endurance capacity.
2.1H-MRS STUDY ON GENDER DIFFERENCES IN INTRAMUSCULAR TRIGLYCERIDES IN HUMAN SKELETAL MUSCLE AND THEIR RELATION TO BODY FAT AND ENDURANCE CAPACITY
YOSHINAO NAKAGAWA ; MASAAKI HATTORI ; KUNIAKI HARADA ; MICHIO BANDO ; GOROH OKANO
Japanese Journal of Physical Fitness and Sports Medicine 2003;52(2):149-157
Gender differences were measured in the amount of intramyocellular triglyceride (IMCL) and extramyocellular triglyceride (EMCL) in skeletal muscles using1H-MR spectroscopy and their relation to body fat and peak VO2was studied. Fourteen apparently healthy subjects were separated into groups by gender. Both the male and female group subjects were selected according to similar ages and BMI (male: n=7, BMI=20.5±0.6 kg/m2, age=21.1±0.7 years, female: n=7, BMI=20.6±0.5 kg/m2, age=18.7±0.3 years) . We found a significant correlation between IMCL and EMCL in the soleus (SQL: p<0.01) and medial gastrocnemius (MG: p<0.01) muscles. IMCL values in SQL were significantly higher than IMCL values in MG and tibialis anterior muscle (TA) in both males and females in the order of SQL>MG>TA (p<0.01) .
IMCL and EMCL values in MG and SQL among females were significantly higher (p<0.01) than their corresponding values in males. However, a gender difference in IMCL and EMCL values for TA was not found. There was no correlation between IMCL and EMCL values for each muscle and BMI ; but IMCL (r=0.63 in SQL) and EMCL (r=0.88 and r=0.73 in SQL, and MG, respectively; p< 0.01) values correlated significantly with percent FAT. There was no correlation between IMCL values for each muscle and peak VO2; but the EMCL values of SQL correlated quite negatively with peak VO2 (r=-0.63, p<0.05) . These results suggest that there are gender differences in intramyocellular and extramyocellular triglyceride contents. Lipids were positively related to percent body fat in SQL and MG; EMCL values may have a negative effect on endurance capacity.
3.INTRAMUSCULAR LIPID CONTENT IN FEMALE ENDURANCE-TRAINED ELDERLY PERSONS BY IN VIVO 1H-MR SPECTROSCPY
YOSHINAO NAKAGAWA ; MASAAKI HATTORI ; KUNIAKI HARADA ; RYUJI SHIRASE ; MICHIO BANDO ; GOROH OKANO
Japanese Journal of Physical Fitness and Sports Medicine 2006;55(Supplement):S59-S64
The aim of this study is the evaluation of intramyocellular (IMCL) and extramyocellular lipids (EMCL) in skeletal muscle in elderly female endurance-trained individuals. The subjects comprised endurance-trained elderly persons (END : n=7, age=66.1±2.0) and healthy elderly control subjects (CON : n=7, age=70.1±3.0). All subjects were female and matched by age and lower BMI. We quantified differences in IMCL and EMCL concentrations in the tibialis anterior (TA), soleus (SOL), and medial gastrocnemius (MG) muscles using 1H-MR spectroscopy. The IMCL and EMCL contents in SOL and MG in END were significantly lower than those in CON (p<0.01). Total lipid content in SOL and MG was lower in END. The IMCL and EMCL contents in TA in END were slightly lower than those in CON. Water contents of all types of muscle in END were higher than those in CON. These results suggest that stored IMCL and EMCL in END are less than in CON.
4.A Case of Successful Valve Repair in Traumatic Aortic Regurgitation Associated with the Dilated Aortic Annulus
Satoshi ARIMURA ; Mitsutaka NAKAO ; Naritomo NISHIOKA ; Yohkoh MATSUMURA ; Michio YOSHITAKE ; Ryuichi NAGAHORI ; Ko BANDO ; Kiyozo MORITA ; Takashi KUNIHARA
Japanese Journal of Cardiovascular Surgery 2020;49(6):358-361
Here, we present a case of successful aortic valve repair of traumatic aortic regurgitation (AR). A man in his early twenties had a chest blunt trauma due to a bicycle accident 6 years earlier and suffered sternum fracture. He recovered without cardiovascular complications. Three months previously, a new diastolic murmur was detected on medical checkup. Transthoracic echocardiography (TTE) showed severe AR, and the left ventricular end-diastolic-/end-systolic dimension was 69/51 mm. Transesophageal echocardiography showed severe AR with perforation of the non-coronary cusp and dilatation of the aortic annulus (29.6 mm). Aortic valve repair was performed with an autologous pericardial patch and external suture annuloplasty. Postoperative TTE showed normal aortic valve function with trivial AR. He was discharged on postoperative day 11. Three months later, TTE showed trivial AR along with a reduced left ventricular dimension and improved left ventricular ejection fraction.