Ectopic Beat: From 2 Different Sources
A heart muscle contraction that is outside the normal sequence of the cardiac cycle (see HEART). The impulse is generated outside the usual focus of the SINOATRIAL NODE. Also known as extrasystoles, ectopic beats are called ventricular if they arise from a focus in the ventricles and supraventricular if they arise in the atria. They may cause no symptoms and the affected subject may be unaware of them. The beat may, however, be the result of heart disease or may be caused by NICOTINE or CAFFEINE. If persistent, the individual may suffer from irregular rhythm or ventricular ?brillation and need treatment with anti-arrhythmic drugs.
(extrasystole) a heartbeat due to an impulse generated somewhere in the heart outside the sinoatrial node. Ectopic beats are generally premature in timing; they are classified as supraventricular if they originate in the atria and ventricular if they arise from a focus in the ventricles. They may be produced by any heart disease, by nicotine from smoking, or by caffeine from excessive tea or coffee consumption; they are common in normal individuals. The patient may be unaware of their presence or may feel that his heart has ‘missed a beat’. Ectopic beats may be suppressed by drugs such as quinidine, propranolol, and lidocaine; avoidance of smoking and reduction in excessive tea or coffee intake may help. See arrhythmia.
This is the beat of the APEX of the HEART, which can be felt through the skin to the left of the breastbone between the ?fth and sixth ribs.... apex beat
An ectopic pregnancy most commonly develops in one of the FALLOPIAN TUBES. Occasionally it may occur in one of the OVARIES, and rarely in the uterine cervix or the abdominal cavity. Around one in 200 pregnant women have an ectopic gestation. As pregnancy proceeds, surrounding tissues may be damaged and, if serious bleeding happens, the woman may present as an ‘abdominal emergency’. A life-threatening condition, this needs urgent surgery. Most women recover satisfactorily and can have further pregnancies despite the removal of one Fallopian tube as a result of the ectopic gestation. Death is unusual. This disorder of pregnancy may occur because infection or a previous abdominal injury or operation may have damaged the normal descent of an ovum from the ovary to the womb. The ?rst symptoms usually appear during the ?rst two months of pregnancy, perhaps before the woman realises she is pregnant. Severe lower abdominal pain and vaginal bleeding are common presenting symptoms. Ultrasound can be used to diagnose the condition and laparoscopy can be used to remove the products of conception. (See PREGNANCY AND LABOUR.)... ectopic pregnancy
Ectopic means out of the usual place. For example, the congenital displacement of the heart outside the thoracic cavity is said to be ectopic. An ‘ectopic gestation’ means a pregnancy outside of the womb (see ECTOPIC PREGNANCY).... ectopic
See ECTOPIC BEAT.... premature beat
(Celtic) One who gives life Betha, Beathah, Bethah... beatha
(Hebrew) One who serves God... beathag
(Scottish) Having great wisdom... beathas
(Latin) One who blesses others Beatrix, Beatriz, Beatriss, Beatrisse, Bea, Beatrize, Beatricia, Beatrisa, Beate, Beata, Beat, Bee, Beitris, Betrys, Bettrys, Bice... beatrice
See: TACHYCARDIA.... heart, rapid beat
A testis that is absent from the scrotum because it has descended into an abnormal position, usually in the groin or at the base of the penis. The condition is most often discovered soon after birth during a routine physical examination. It is treated by orchidopexy. (See also testis, undescended.) ... testis, ectopic
a hormone produced by cells that do not usually produce it. Some tumour cells secrete hormones; for example, small-cell lung cancer cells secrete antidiuretic hormone and cause *hyponatraemia.... ectopic hormone
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