Gait analysis was conducted on 7 healthy pregnant women (pregnant group) and 6 non-pregnant women (pseudo-pregnant group) using a 3-D motion analysis system (VICON 460) and two forceplates (Kistlar 9286A). The data was collected at 8-9 months of gestation (pregnant condition) and 4-8 months postpartum (non-pregnant condition) in the pregnant group. In the pseudo-pregnant group, the participants walked with a 5kg-load on their belly (pregnant condition) and without any load (non-pregnant condition). Comparisons using two-way ANOVAs with repeated measures were conducted. Interaction of group × condition was not observed in the measured gait parameters except the angle of the maximum hip adduction. Main effect in the condition and the group was found in some parameters. In the pregnant condition, gait velocity was slower (pregnant group 68.7±8.6 m/min pseudo-pregnant group 63.8±4.8 m/min) than in the non-pregnant condition (pregnant group 75.5±3.2 m/min pseudo-pregnant group 69.8±8.7 m/min). The second vertical peak ground reaction force was smaller in the pregnant condition (pregnant group 105.4±4.8 % pseudo-pregnant group 108.4±6.3 % of body-weight) than in the non-pregnant condition (pregnant group 114.3±7.4 % pseudo-pregnant group 113.5±4.2 % of body-weight). These results demonstrated that pregnant condition changed kinetic and kinematic characteristics of the gait.

BACKGROUND AND OBJECTIVES: The differences between electromagnetic-based mapping (EM) and impedance-based mapping (IM) in 3D anatomical reconstruction have not been fully clarified. We aimed to investigate the anatomical accuracy between EM (MediGuide™) and IM (EnSite Velocity™) systems. METHODS: We investigated 15 consecutive patients (10 males, mean age 58±9 years) who underwent pulmonary veins (PVs) isolation for paroxysmal atrial fibrillation (PAF). Contrast-enhanced computed tomography (CT) image of the left atrium (LA) was acquired before ablation and the 3D geometry of the LA was constructed using EM during ablation procedure. We measured the 4 PV angles between the main trunk of each PV and the posterior LA after field scaling. Additionally, the posterior LA surface area was measured. The variables were compared to those of CT-based geometry. A control group of 40 patients who underwent conventional PVs isolation using IM were also evaluated. RESULTS: The actual and relative changes of EM and CT-based geometry in all PV angles and posterior LA were significantly smaller compared to those of IM and CT-based geometry. Intraclass correlation coefficient (ICC) between EM and CT-based geometry were 0.871 (right superior pulmonary vein [RSPV]), 0.887 (right inferior pulmonary vein [RIPV]), 0.853 (left superior pulmonary vein [LSPV]), 0.911 (left inferior pulmonary vein [LIPV]), and 0.833 (posterior LA). On the other hand, ICC between IM and CT-based geometry were 0.548 (RSPV), 0.639 (RIPV), 0.691 (LSPV), 0.706 (LIPV), and 0.568 (posterior LA). CONCLUSIONS Image integration with EM enables high accurate visualization of cardiac anatomy compared to IM in PAF ablation.

BACKGROUND AND OBJECTIVES: The differences between electromagnetic-based mapping (EM) and impedance-based mapping (IM) in 3D anatomical reconstruction have not been fully clarified. We aimed to investigate the anatomical accuracy between EM (MediGuide™) and IM (EnSite Velocity™) systems. METHODS: We investigated 15 consecutive patients (10 males, mean age 58±9 years) who underwent pulmonary veins (PVs) isolation for paroxysmal atrial fibrillation (PAF). Contrast-enhanced computed tomography (CT) image of the left atrium (LA) was acquired before ablation and the 3D geometry of the LA was constructed using EM during ablation procedure. We measured the 4 PV angles between the main trunk of each PV and the posterior LA after field scaling. Additionally, the posterior LA surface area was measured. The variables were compared to those of CT-based geometry. A control group of 40 patients who underwent conventional PVs isolation using IM were also evaluated. RESULTS: The actual and relative changes of EM and CT-based geometry in all PV angles and posterior LA were significantly smaller compared to those of IM and CT-based geometry. Intraclass correlation coefficient (ICC) between EM and CT-based geometry were 0.871 (right superior pulmonary vein [RSPV]), 0.887 (right inferior pulmonary vein [RIPV]), 0.853 (left superior pulmonary vein [LSPV]), 0.911 (left inferior pulmonary vein [LIPV]), and 0.833 (posterior LA). On the other hand, ICC between IM and CT-based geometry were 0.548 (RSPV), 0.639 (RIPV), 0.691 (LSPV), 0.706 (LIPV), and 0.568 (posterior LA). CONCLUSIONS: Image integration with EM enables high accurate visualization of cardiac anatomy compared to IM in PAF ablation.
Atrial Fibrillation ; Atrial Flutter ; Catheters ; Fluoroscopy ; Hand ; Heart Atria ; Humans ; Magnets ; Male ; Pulmonary Veins

As a screening tool for detecting latent pre-locomotive syndrome (latent pre-LS) in women over the age of 40, measuring handgrip strength with a cut-off value of 26 kg was proposed in a previous report. However, this screening method missed 22% of latent pre-LS. It would be beneficial to screen almost persons with latent pre-LS in community pharmacies. In this study, it was investigated whether screening using the combination of measuring handgrip strength and the questionnaire, “Loco-check,” which was proposed by the Japanese Orthopaedic Association, improved the detection of latent pre-LS in the same group mentioned above. Combining only one of the “Loco-check” questions, “I cannot put on a pair of socks while standing on one leg,” with the measurement of handgrip strength with the cut-off value of 26 kg, the detection of latent pre-LS was increased to 90.2%. The odds ratio was 9.72 in logistic regression analysis. Using the combination of the measurement of handgrip strength and the response to one question is both rapid and convenient. Therefore, in this study, this screening combination is proposed to be a useful tool in community pharmacies for detecting early latent pre-LS.