period /pe·ri·od/ (
pēr´e-od) an interval or division of time.
ejection period the second phase of ventricular systole, being the interval between the opening and closing of the semilunar valves, during which the blood is discharged into the aortic and pulmonary arteries; it is divided into a p. of rapid ejection followed by a p. of reduced ejection.
gestation period the duration of pregnancy, in humans being about 266 days (38 weeks) from the time of fertilization until birth. In obstetrics, it is instead considered to begin on the first day of the woman's last normal menstrual period prior to fertilization, thus being about 280 days (40 weeks).
incubation period 1. the interval of time required for development.
2. the interval between the receipt of infection and the onset of the consequent illness or the first symptoms of the illness.
3. the interval between the entrance into a vector of an infectious agent and the time at which the vector is capable of transmitting the infection.
latent period a seemingly inactive period, as that between exposure to an infection and subsequent illness, or that between the instant of stimulation and the beginning of response.
menstrual period , monthly period the time of menstruation.
pacemaker refractory period the period immediately following either pacemaker sensing or pacing, during which improper inhibition of the pacemaker by inappropriate signals is prevented by inactivation of pacemaker sensing.
refractory period the period of depolarization and repolarization of the cell membrane after excitation; during the first portion (absolute refractory p.), the nerve or muscle fiber cannot respond to a second stimulus, whereas during the relative refractory period, it can respond only to a strong stimulus.
safe period the period during the menstrual cycle when conception is considered least likely to occur; it is approximately the ten days after menstruation begins and the ten days preceding menstruation.
Wenckebach period the steadily lengthening P–R interval occurring in successive cardiac cycles in Wenckebach block.
pe·ri·od (pîr  - d)n.1. An interval of time characterized by the occurrence of a certain condition, event, or phenomenon. 2. One of the stages of a disease. 3. A menstrual period. 4. A sequence of elements arranged in order of increasing atomic number. |
period [pir′ē·od]
1 an interval of time.
2 one of the stages of a disease.
3 (in physics) the duration of a single cycle of a periodic wave or event.
period [
pēr´e-od]
an interval or division of time; the time for the regular recurrence of a phenomenon.
blanking period a period of time during and after a pacemaker stimulus when the unstimulated chamber is insensitive to avoid sensing the electronic event in the stimulated chamber.
ejection period the second phase of
ventricular systole (0.21 to 0.30 sec), between the opening and closing of the semilunar valves, while the blood is discharged into the aorta and pulmonary artery. Called also
sphygmic period.
isoelectric period the moment in muscular contraction when no deflection of the
galvanometer is produced.
latent period a seemingly inactive period, as that between exposure to an infection and the onset of illness (
incubation period) or that between the instant of stimulation and the beginning of response (
latency, def. 2).
relative refractory period the part of the
refractory period from approximately −60 mV during phase 3 to the end of phase 3; during this time a depressed response to a strong stimulus is possible.
safe period the period during the
menstrual cycle when
conception is considered least likely to occur; it comprises approximately the ten days after
menstruation begins and the ten days preceding
menstruation. See the section on
fertility awareness methods, under
contraception.
supernormal period in electrocardiography, a period at the end of phase 3 of the
action potential during which activation can be initiated with a milder stimulus than is required at maximal
repolarization, because at this time the cell is excitable and closer to threshold than at maximal
diastolic potential.
vulnerable period that time at the peak of the T wave during which serious arrhythmias are likely to result if a stimulus occurs.
period Vox populi A discrete time frame. See
Accumulation period, Blanking period, Collection period, Critical period,
Crystallization period,
Eligibility period, Golden period, Grant budget period,
Honeymoon period,
Incubation period,
Infectious period, Initial eligibility period,
Last menstrual period,
Latency period,
NREMS period,
Off period, Open enrollment period, Postoperative period, Pre-ejection period, Pre-patent period, Probationary period, Project period,
Refractory
period,
REMS period, Sleep stage period, Sleep-onset REMS period, Total sleep period,
Waiting period,
Window period.
Patient discussion about period. Q. I have missed 2 periods and had my tubes tied. What could be wrong? I went to the doctor and she didnt even do an exam. She said dont worry until I have missed for 6 months.
A. my wife had her tubes tied a year ago, she gets her period every 3 months,and they are usally pretty short. i wouldnt worry.
Q. my little sister have her periode badly.it stay for a months somethimes what can cause that? Since she start having her periode is been a problem and anybody cannot give us a straight answer she's been a hospitolize and had to have blood transfussion she's always anemic and sh'es been putting on pills but her body did not react good to it we had to stop.Sometimes she fells so weak that she pass out.The doctor say she may need to hospitolized again she doenst want to and we dont know how to help her she just wants a normal teenager and get ready to go away to collegebut we are scare that may not happens,she loves school so much and she feltthat she will never be a normal woman like everybody and scare that she may never have children one day i tell her to not be worry about it but i feel helpless.Please tell me what's wrong with her since nobody seems to give us a straight answers.Is follicular cyst of ovaries can put her in so much pain.
A. My daughter is 23 years old and has had a continuous period for 2 months. She had DNC surgery about a year ago - which helped for a few months. This situation has put a damper on her sexual lifestyle with her husband. Any idea what would cause this condition? Rhartman@txgas.com.
Q. I'm very much worried because of my late period. Hello, I hope I can get some help out here. I always had regular periods and never missed one. But this time, I have missed the date by 5 days. I am more confused as I am having the signs of periods but it does not come through. Also to add to my worry, I have been facing the symptoms of pregnancy. Well to be very honest, I had sex with my boy friend and we did not use condoms. I did realize that he ejaculated inside me. I am not really happy as I sincerely do not want to become pregnant now. Please help me. I am experiencing the following symptoms and hope someone can help me.Back ache, very tender breast, tired, cramps, more discharge than anytime, dizziness, nauseated.
I would appreciate if someone can help me . I'm very much worried because of my late period.
A. Yes, I agree with mrfoot. next time you need to be more responsible to yourself, that's for your own sake.
what you need to do now is get yourself checked, you can use home pregnancy test, or just go to your doctor's practice. next time, I will suggest you and your boyfriend to use contraception methods (such as: condom, IUD, hormonal injection, pills, etc.)
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