Sinusoidal pattern. org Mar 29, 2011 · Learn how to read a cardiotocogram (CTG) and interpret its characteristics, such as sinusoidal pattern and variability. " Traditionally, the sinusoidal fetal heart rate tracing is accompanied by absent variability (beat-to-beat). 24 It is a regular, smooth, undulating form typical of a sine wave that occurs Aug 1, 2020 · Category III tracings, defined by a sinusoidal FHR pattern (Figure 3 7) or absent FHR variability (Figure 4 7) with recurrent late and/or variable decelerations or fetal bradycardia (see the Fetal Sinusoidal The term sinusoidal is used to describe a curve, referred to as a sine wave or a sinusoid, that exhibits smooth, periodic oscillation. documented the disappearance of a sinusoidal heart rate pattern during exchange transfusions, we are inclined to support the hypothesis of Young and sinusoidal FHR pattern that is most likely ominous. . A sinusoidal pattern defined as having "a visually apparent, smooth, sine wave-like undulating pattern in FHR baseline with a cycle frequency of 3-5/min that persists for ≥20 minutes. Pseudosinusoidal patterns resemble sinusoidal patterns but without adverse fetal outcomes. Depending on the clinical situation, efforts to expeditiously resolve the underlying cause of the abnormal fetal heart rate pattern should be made. May 1, 1999 · The true sinusoidal pattern is rare but ominous and is associated with high rates of fetal morbidity and mortality. With the classical sine wave pattern, there are no additional accelerations or decelerations. See full list on acog. Jul 1, 2024 · The sinusoidal pattern in cardiotocographic (CTG) monitoring shows a sinus-shaped signal longer than 30 min without short-term variability. Predictive of abnormal fetal-acid base status at the time of observation. Sinusoidal graph The term sinusoid is based on the sine function y = sin (x), shown below. On the basis of this definition, 27 tracings were classified as Sinusoidal Pattern This unusual and uncommon FHR pattern has the appearance of a sine wave, with a cyclicity of three to five cycles per minute. Sinusoids occur often in math, physics, engineering, signal processing and many other areas. This pattern must persist for at least 20 minutes to qualify as a sinusoidal pattern. A review was made of the available literature on the sinusoidal heart rate (SHR) pattern. Abstract Objectives: To address the clinical significance of sinusoidal heart rate (SHR) pattern and review its occurrence, define its characteristics, and explain its physiopathology. This study aims to characterise sinusoidal and pseudosinusoidal patterns using spectral Jun 14, 2025 · Learn about the importance of sinusoidal fetal heart rate monitoring during pregnancy, including its implications for fetal health and the steps expectant mothers can take to ensure the best possible outcomes. It is commonly linked to fetal morbidity, particularly severe fetal anemia. A specific definition of SHR was made in order to elucidate its clinical significance. Sinusoidal pattern is a smooth, regular and constant fetal heart rate, while variability is the variation of heart rate from the baseline. Sinusoidal pattern OR absent variability with recurrent late decelerations, recurrent variable decelerations, or bradycardia. According to this definition, 41 tracings from 23 publications were classified as being either true SHR, equivocal, or a heart rate pattern other than SHR. 3zce tkxl km qwek q6p6i9w eg3gw xfy578x fq43 itp8j iho7cht