premature senility syndrome |
<syndrome> Accelerated aging syndrome in which most of the characteristic stages of human senescence are compressed into less than a decade. Defect probably in DNA repair.
(18 Nov 1997) |
premature systole |
A premature contraction of the heart that is independent of the normal rhythm and arises in response to an impulse in some part of the heart other than the sinoatrial node.
Synonym: premature beat.
(18 Nov 1997) |
premature ventricular contractions |
Contractions of the lower chambers of the heart, the ventricles, which occur earlier than usual, because of abnormal electrical activity of the ventricles. The premature contraction is followed by a pause, as the heart electrical system resets itself and the contraction following the pause is usually more forceful than normal. These more forceful contractions are frequently perceived as palpitations.
(12 Dec 1998) |
infant, premature |
An infant born before 38 weeks of gestation.
(12 Dec 1998) |
ovarian failure, premature |
Premature failure of ovulation associated with hypergonadotropinism and hypoestrogenism in women under the age of 40. The aetiology appears to be multifactorial and many cases are idiopathic. When follicles are present but the ovaries are unable to respond to gonadotropins, resistant ovary syndrome results and this may be associated with autoimmune disease. Even when there is a loss of ovarian follicles, it is not always complete. Permanent and irreversible loss of follicles is termed premature menopause (menopause, premature).
(12 Dec 1998) |
labour, premature |
Onset of labour before term but after the foetus has become viable, usually sometime during the 29th through 38th week of gestation.
(12 Dec 1998) |
foetal membranes, premature rupture |
Spontaneous rupture of amniotic sac before the onset of uterine contractions.
(12 Dec 1998) |
anodal closure contraction |
An obsolete term for the momentary contraction of a muscle under the influence of the positive pole when the electrical circuit is established.
(05 Mar 2000) |
anodal opening contraction |
An obsolete term for the momentary contraction of a muscle under the influence of the positive pole when the circuit is broken.
(05 Mar 2000) |
automatic contraction |
In contrast to forced beat, an ectopic beat that arises de novo and is not precipitated by the preceding beat; thus escaped and parasystolic beat's are automatic.
Synonym: automatic contraction.
(05 Mar 2000) |
braxton hicks contraction |
Rhythmic uterine muscle activity which occurs during the course of a pregnancy which causes no pain for the patient.
(27 Sep 1997) |
paradoxical contraction |
A tonic contraction of the anterior tibial muscles when a sudden passive dorsal flexion of the foot is made.
(05 Mar 2000) |
carpopedal contraction |
<clinical sign> Spasms of the hands or feet that may be seen in association with hypocalcaemia or hyperventilation.
(08 Jan 1998) |
reflex detrusor contraction |
Normal coordinated function of the bladder with sustained contractions of the bladder matched by simultaneous relaxation of the sphincteric outlet mechanisms to empty the bladder.
(05 Mar 2000) |
cathodal closure contraction |
An obsolete term for the momentary contraction of a muscle under the influence of the negative pole when an electrical circuit is established.
(05 Mar 2000) |