Galectin-3 as a novel biomarker in cats with hypertrophic cardiomyopathy.

INTRODUCTION/OBJECTIVES: Galectin-3 (Gal-3) is a circulating biomarker of fibrosis. In humans, increased Gal-3 is predictive of myocardial fibrosis and adverse cardiac events. The aim of this study was to evaluate the potential for Gal-3 as a cardiac biomarker in cats with hypertrophic cardiomyopathy (HCM). MATERIALS AND METHODS: Eighty cats were enrolled (25 healthy cats with normal hearts, 35 with HCM American College of Veterinary Internal Medicine (ACVIM) stage B, and 21 with HCM ACVIM stage C). Each cat received a full echocardiogram, health panel, and total thyroxin level. Galectin-3 levels were measured for each enrolled patient. Troponin I and N-terminal pro-brain natriuretic peptide (NT-proBNP) were obtained for the majority of cats. Additionally, 17 ACVIM stage B cats underwent cardiac-gated magnetic resonance (CMR) imaging to assess myocardial extracellular volume (ECV), a noninvasive measure of myocardial fibrosis. RESULTS: Galectin-3 levels are increased in cats with HCM ACVIM stage B and C compared to healthy cats; however, no significant differences were detected between ACVIM stage B and ACVIM stage C cats. In HCM-affected cats, Galectin-3 showed statistically significant correlations with left atrial dimensions, left atrial:aorta ratio, and CMR-derived ECV. Quantitative NT-proBNP showed excellent discrimination between all groups and troponin I was able to discriminate between ACVIM stage C and normal cats, but not between other groups. CONCLUSIONS: Circulating Gal-3 levels are increased in cats with HCM and is positively correlated with left atrial dimensions and ECV in affected cats. Further studies evaluating the relationship between Gal-3, myocardial fibrosis, and clinical outcomes are warranted.

Comparison of three two-dimensional echocardiographic methods of assessing left ventricular size in Doberman Pinschers.

INTRODUCTION: Compare three methods of obtaining linear left ventricular dimensions within the same Doberman Pinscher (DP). ANIMALS: One hundred and thirty-nine client-owned DP. MATERIALS AND METHODS: Linear left ventricular dimensions were measured using two-dimensional short-axis (Sx-2D), motion-mode short-axis (Sx-MM), and motion-mode long-axis (Lx-MM) methods, then left ventricular volumes were obtained using monoplane Simpson's method of discs (SMOD). A Friedman test with Dunn's multiple comparisons was used to compare differences between methods. Bias and correlation were evaluated via Bland-Altman and Spearman's correlation. Sensitivity and specificity for diagnosing occult dilated cardiomyopathy (DCM) compared to SMOD were determined. Coefficients of variation (CVs) were calculated for intra- and inter-observer measurement variability. RESULTS: There were significant differences between all linear dimensions in diastole and systole. Short-axis 2D measurements had significant bias compared with Sx-MM (diastole +1.19 mm, systole +1.65 mm) and Lx-MM (diastole +4.36 mm, systole +3.87 mm) as did Sx-MM compared with Lx-MM (diastole +3.17 mm, systole +2.22 mm). All linear dimensions had a moderate positive correlation with SMOD. The sensitivity and specificity of linear measurements to detect DCM were: Sx-2D (sensitivity 72.0%, specificity 88.5%), Sx-MM (sensitivity 52.0%, specificity 92.0%), and Lx-MM (sensitivity 37.5%, specificity 99.1%). All methods had acceptably low CV for intra- and inter-observer measurement variability. CONCLUSIONS: Results of this study suggest that linear measurements are repeatable and correlate with reference standard; however, there is a significant bias between measurements, and they should not be used interchangeably.

Reference intervals and echocardiographic findings in Leonberger dogs.

INTRODUCTION: Leonbergers are large-breed dogs believed to be predisposed to dilated cardiomyopathy, yet the normal echocardiographic measurements of these dogs are unknown. The aim of this study was to describe echocardiographic findings and propose breed-specific reference intervals (RIs) for Leonbergers. ANIMALS: A total of 42 clinically healthy dogs were involved in this study. MATERIALS AND METHODS: This study was designed as a cross-sectional study of 42 Leonberger dogs undergoing complete transthoracic echocardiographic studies at a national show. Reference intervals were determined using robust method with bootstrapping. The effects of age, sex, and body weight (BW) on linear and volumetric dimensions were evaluated by regression analysis. Intra- and interobserver variability were evaluated by coefficient of variation from 10 of the studies. RESULTS: There were significant linear correlations with BW for many of the cardiac variables evaluated. However, despite the statistical significance, most regression equations had small slopes, necessitating large changes in BW for small changes in two-dimensional echocardiographic variables. As such, this study resulted in breed-specific RIs irrespective of BW. Trace mitral insufficiency (n = 18), trace aortic insufficiency (n = 15), or both (n = 1) was identified in 81% of dogs in this population. Coefficients of variation were <9% for all two-dimensional, volumetric, and motion mode measurements. CONCLUSIONS: This study describes echocardiographic findings and provides RIs, which may be useful in echocardiographic evaluations of Leonbergers and may aid in early identification of heart disease within the breed.

Reinventing fatherhood in Japan and Canada.

This article summarizes the findings of a transnational study of Japanese and Canadian families. Fathers' perceptions are presented for a critical developmental phase of life: pregnancy, labor, birth, the early and late postpartum periods. Using qualitative and quantitative research methods, 33 fathers and 194 mothers were interviewed: Japanese in Tokyo and Montreal, and English and French Canadians in Montreal. In addition, the study examines the impact of pregnancy and birth on the relationship of marriage. The results suggest that the social meaning of fatherhood has been transformed, legitimizing the presence of the father in the domestic sphere as a consequence of shifting extended family household structures, economic conditions and the empowerment of women. Other significant (p < 0.05) patterns were identified. (1) Canadian fathers participate in labor and delivery to a higher degree than Japanese fathers in Montreal and Tokyo do (mothers in Tokyo felt more isolated). (2) Canadian men (60%) are more likely to take time off from work during this phase than the Japanese. (3) Overall, the majority of fathers, in all four groups, cared for the child to a higher degree than expected and (4). Birth and early child rearing appears to have a significant impact on marriage in all four groups. Public policy issues are addressed and potential responses provided.

Multi-disciplinary perspectives on post-partum depression: an anthropological critique.

One negative outcome of the post-partum period is the occurrence of post-partum depression. While the incidence levels are high in the U.S. for the 'Blues' and the 'moderate level depression disorder', the nature of this phenomenon--as a disease and as an illness--remains unclear. It is suggested that an anthropological perspective incorporating symbolic behavior and biological processes may more effectively address the problem than isolated biological and psycho-social research. Theories of etiology based strictly in biological mechanisms have resulted in a treatment bias towards pharmacological intervention; this paper suggests that more attention should be given to the impact of the cultural patterning of the post-partum period, e.g. the structure, organization of the family group and role expectations. A review of the anthropological literature on childbirth provides little evidence for post-partum depression. Our own observations and an examination of the cross-cultural literature have identified common elements in the social structuring of the post-partum period. They include: (1) cultural patterning of a distinct post-partum period; (2) protective measures designed to reflect the vulnerability of the new mother; (3) social seclusion; (4) mandated rest; (5) assistance in tasks from relatives and/or midwife; (6) social recognition of new social status through rituals, gifts or other means. A hypothesis is proposed that a relationship exists between post-partum social organization/mobilization and post-partum depression. The experience of 'depression' in the U.S. may represent a culture bound syndrome resulting from the lack of social structuring of the post-partum events, social recognition of the role transition for the new mother and instrumental support and aid for the new mother.