What causes a sinusoidal fetal heart rate pattern?
SINUSOIDAL PATTERN. The true sinusoidal pattern is rare but ominous and is associated with high rates of fetal morbidity and mortality.24 It is a regular, smooth, undulating form typical of a sine wave that occurs with a frequency of two to five cycles per minute and an amplitude range of five to 15 bpm.
Saltatory fetal heart rate pattern. The saltatory fetal heart rate pattern was defined as fetal heart amplitude changes of greater than 25 beats per minute with an oscillatory frequency of greater than 6 per minute for a minimum duration of 1 minute.
- Because of this, most doctors will only encourage you to speed up the dilation process or induce labor when they feel it is necessary.
- Use Birth Balls.
- Do Gentle Exercises.
- Relax with Warm Shower.
- Empty Your Bladder.
- Stimulate Your Nipples or Have Sex.
- Try Acupressure.
- Opt for Medical Methods.
- Pineapple contains the enzyme bromelain, which is thought to help soften your cervix and bring on labour. One pineapple contains a very small amount of bromelain. You would need to eat as many as eight pineapples for it to have any effect.
- Pineapple is a safe, healthy choice during pregnancy. Someone might have told you to avoid this fruit because it may cause early miscarriage, or bring on labor. But this is an old wives' tale. There's no scientific evidence to support that pineapple is dangerous during pregnancy.
A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation. A sine wave is a continuous wave. It is named after the function sine, of which it is the graph. It occurs often in pure and applied mathematics, as well as physics, engineering, signal processing and many other fields.
- A sinusoidal function is a function that is like a sine function in the sense that the function can be produced by shifting, stretching or compressing the sine function. If necessary you might like to review the graphing shortcuts.
- As the coil rotates the voltage decreases according to the sine of the angle until the conductor is parallel to the magnetic field. Further rotation then increases the voltage until once again it is at a maximum (but in the opposite direction). For each revolution a complete sine wave is generated.
- But if your potassium levels are high enough to cause symptoms, you may have:
- tiredness or weakness.
- a feeling of numbness or tingling.
- nausea or vomiting.
- trouble breathing.
- chest pain.
- palpitations or irregular heartbeats.
Reassuring FHR readings include periodic accelerations, mild variable decelerations lasting less than 30 seconds, or early decelerations that mirror contracitons in duration and timing. Nonreassuring FHR patterns are those that suggest fetal compromise or a declining ability to cope with the stress of labor.
- A normal fetal heart rate (FHR) usually ranges from 120 to 160 beats per minute (bpm) in the in utero period. It is measurable sonographically from around 6 weeks and the normal range varies during gestation, increasing to around 170 bpm at 10 weeks and decreasing from then to around 130 bpm at term.
- Fetal tachycardia is an abnormal increase in the fetal heart rate. It is variably defined as a heart rate above 160-180 beats per minute (bpm) and typically ranges between 170-220 bpm (higher rates can occur with tachyarrhythmias).
- A normal CTG has all four features that are reassuring. A CTG is non-reassuring if it has one feature which is non-reassuring, but the others are reassuring. An abnormal CTG has two or more features which are non-reassuring, or any abnormal features.
Updated: 4th October 2019