Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Bologna, 40064, Italy.
Freelance Veterinary Cardiologist, Bologna, Italy.
J Small Anim Pract. 2022 Oct;63(10):756-762. doi: 10.1111/jsap.13532. Epub 2022 Jul 13.
Normal features of the ST segment are poorly characterised in dogs. This study aimed to describe ST segment characteristics in a population of healthy dogs.
Medical records were reviewed to identify healthy dogs that underwent an electrocardiogram. Several ST segment qualitative parameters were evaluated: presence/absence of deviation, type of deviation (depression/elevation) and morphological patterns of depression (horizontal, downsloping, upsloping and sagging) and elevation (horizontal, concave and convex). Moreover, the amplitude of ST segment depression/elevation was measured. The potential effect of sex, bodyweight, age and somatotype on the presence/absence of ST segment deviation was evaluated through binary logistic regression.
One hundred and eighty dogs were enrolled. The deviation was evident in 43 of 180 dogs (23.9%), among which 36 showed depression and seven showed elevation. The median depression amplitude was 0.1 (range 0.05 to 0.3) mV. The mean elevation amplitude was 0.136 ±0.055 mV. Concerning depression morphology, the horizontal pattern was overrepresented, followed by the downsloping and upsloping ones. Concerning elevation morphology, all dogs showed a concave pattern. No meaningful effect of sex, bodyweight, age and somatotype on the presence/absence of ST segment deviation was documented.
Normal features of canine ST segment were described and made available for clinical use.
犬 ST 段的正常特征描述较差。本研究旨在描述健康犬群体的 ST 段特征。
回顾了医疗记录，以确定接受心电图检查的健康犬。评估了几个 ST 段定性参数：有无偏移、偏移类型（压低/抬高）以及压低（水平、下斜、上斜和下垂）和抬高（水平、凹面和凸面）的形态模式。此外，还测量了 ST 段压低/抬高的幅度。通过二项逻辑回归评估性别、体重、年龄和体型对 ST 段偏移存在/不存在的潜在影响。
共纳入 180 只犬。180 只犬中有 43 只（23.9%）存在 ST 段偏移，其中 36 只表现为压低，7 只表现为抬高。压低幅度的中位数为 0.1（范围 0.05 至 0.3）mV。抬高幅度的平均值为 0.136±0.055 mV。关于压低形态，水平型占优势，其次是下斜型和上斜型。关于抬高形态，所有犬均表现为凹面型。未发现性别、体重、年龄和体型对 ST 段偏移存在/不存在有意义的影响。
描述了犬 ST 段的正常特征，并可供临床使用。
