International Heart Journal
Online ISSN : 1349-3299
Print ISSN : 1349-2365
ISSN-L : 1349-2365
Clinical Studies
Functional Capacity, Skeletal Muscle Strength, and Skeletal Muscle Volume in Patients With Myocardial Infarction
Keisuke KidaNaohiko OsadaYoshihiro J. AkashiHiromitsu SekizukaMasaki IzumoYuki IshibashiTakashi ShimozatoAkio HayashiKihei YoneyamaEiji TakahashiKengo SuzukiMasachika TamuraKoji InoueKazuto OmiyaFumihiko Miyake
Author information
JOURNAL FREE ACCESS

2006 Volume 47 Issue 5 Pages 727-738

Details
Abstract

Previous studies have reported that skeletal muscle strength is closely related to exercise capacity in patients with myocardial infarction (MI). However, none of the previous studies have fully investigated the correlation between exercise capacity and the skeletal muscle volume (MV). Seventy patients with MI underwent symptom-limited cardiopulmonary exercise testing using a treadmill. The MV was evaluated by electrical impedance analysis and the maximal knee extension strength (Peak torque: PT) was measured by a Biodex. The subjects were divided into 2 groups according to the MV (group L, MV < 22 kg; group H, MV ≥ 22 kg). The PT was positively and significantly correlated with the peak VO2 in both the L and H groups (r = 0.70 versus r = 0.71). The MV of the lower limbs was positively correlated with the peak VO2 in the L group (r = 0.57), but not in the H group. The lower limb MV was positively and significantly correlated with PT in the L group (r = 0.48), but not in the H group. The exercise capacity of patients with MI is thought to depend on both the strength and volume of the skeletal muscle. In MI patients with high muscle volume, exercise capacity was determined by skeletal muscle strength alone.

Content from these authors
© 2006 by the International Heart Journal Association
Previous article Next article
feedback
Top