Effects of peripartal rumen-derived direct-fed microbials supplementation on lactation performance, metabolism, ruminal fermentation, and microbial abundance in dairy cows.

The objective of this study was to evaluate the effects of a rumen-derived direct-fed microbial (DFM) product on performance, blood biomarkers, ruminal fermentation, and bacterial abundance in dairy cows during the transition period until 100 DIM. Fifty-six Holstein cows were enrolled in a randomized complete block design from -21 to 100 DIM. Cows were blocked based on expected calving date, parity, and previous lactation milk yield for multiparous or genetic merit for primiparous cows.

Rumen-protected methionine supplementation improves lactation performance and alleviates inflammation during a subclinical mastitis challenge in lactating dairy cows.

This study aimed to evaluate the effects of rumen-protected Met on lactation performance, inflammation, and immune response, and liver glutathione of lactating dairy cows during a subclinical mastitis challenge (SMC). Thirty-two Holstein cows (145 ± 51 DIM) were enrolled in a randomized complete block design. At -21 d relative to the SMC, cows were assigned to dietary treatments, and data were collected before and during the SMC.

Phantom Systole: A Failed Ejection Phenomenon between Pulsus Alternans and Systolic Aortic Regurgitation.

• PA and SAR are both related to heart failure. • The authors describe “phantom systole,” a remarkable finding of FE. • PVCs play a key role in worsening systolic heart failure.