Heart rate and ECG response to twitching in thoroughbred foals and mares.

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  • サラブレッド仔馬および母馬の鼻捻子保定による心拍数の変化
  • サラブレッド仔馬および母馬の鼻捻子保定による心拍数の変化〔英文〕
  • サラブレッド シウマ オヨビ ハハ ウマ ノ ビミノルシ ホテイ ニ ヨル シ

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Abstract

Changes of the heart rate and ECG to twitching were examined using 5 Thoroughbred foals at various ages and their mares. The effect of the heart rate decrease to twitching was significantly greater in the foals than in the mares. The decreased heart rate in the foals continued during and after the twitching. Changes of the T wave in the A-B lead ECG shown as enhancement of the negative ingredient of the T wave were observed both in the foals and in the mares, accompanied by a decrease in the heart rate during and/or after the twitching. Two out of the five foals showed second-degree A-V block following a decrease in the heart rate during and/or after the twitching at the 3.5 and 4 months of age and thereafter.

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