Genetic parameter estimates for methane emission from breath during lactation and potential inaccuracies in reliabilities assuming a repeatability versus random regression model.

Methane emissions will be added to many national ruminant breeding programs in the coming years. Little is known about the covariance structure of CH traits over a lactation, which is important for optimizing recording strategies and establishing optimal genetic evaluation models. Our aim was to study CH over a lactation using random regression (RR) models, and to compare the accuracy to a fixed regression repeatability model under different phenotyping strategies.

Heritability and genetic correlations between enteric methane production and concentration recorded by GreenFeed and sniffers on dairy cows.

To reduce methane (CH) emissions of dairy cows by animal breeding, CH measurements have to be recorded on thousands of individual cows. Currently, several techniques are used to phenotype cows for CH, differing in costs and applicability. However, there is uncertainty about the agreement between techniques.

Genetic parameters for repeatedly recorded enteric methane concentrations of dairy cows.

Animal breeding techniques offer potential to reduce enteric emissions of ruminants to lower the environmental impact of dairy farming. The aim of this study was to estimate the heritability and repeatability of methane (CH) concentrations, using the largest data set from long-term repeatedly recorded CH on cows to date, and to evaluate (1) the accuracy of breeding values for different CH traits, including using visits or weekly means, and (2) recording strategies (with varying numbers of records and recorded daughters per sire). The data comprised of long-term recording of CH and carbon dioxide (CO), from 1,746 Holstein Friesian cows, on 14 commercial dairy farms throughout the Netherlands.

Ventricular scar channel entrances identified by new wideband cardiac magnetic resonance sequence to guide ventricular tachycardia ablation in patients with cardiac defibrillators.

Aims: Ventricular tachycardia (VT) substrate-based ablation has become a standard procedure. Electroanatomical mapping (EAM) detects scar tissue heterogeneity and define conduction channels (CCs) that are the ablation target. Late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) is able to depict CCs and increase ablation success.

Cannulated screws versus hemiarthroplasty for displaced intracapsular femoral neck fractures in demented patients.

Backgrounds And Aims: There are no randomised trials comparing internal fixation and hemiarthroplasty for a displaced intracapsular femoral neck fracture in relation to mental state.

Material And Methods: To establish what should be the treatment of first choice, a prospective randomised clinical study was performed on 60 demented patients with displaced intracapsular femoral neck fractures, comparing internal fixation (n = 31) with hemiarthroplasty (n = 29).

Results: There was no significant difference in the mortality rate of both groups.