tachycardia: see arrhythmia arrhythmia , disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significance except in the presence of additional symptoms.
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tachycardia

Heart rate over 100 (as high as 240) beats per minute. When it is a normal response to exercise or stress, it is no danger to healthy people, but when it originates elsewhere, it is an arrhythmia. Symptoms include fatigue, faintness, shortness of breath, and feeling the heart thumping. It may subside within minutes or hours with no lasting ill effects, but in serious heart, lung, or circulatory disease it can precede atrial fibrillation or heart attack and demands immediate medical attention. Tachycardias can be treated by an electric shock to the heart, by antiarrhythmic drugs, and by pacemakers.

tachycardia [¦tak·ə¦kärd·ē·ə]

(medicine)

Excessive rapidity of the heart's action.

Tachycardia

an increase in the frequency of cardiac contractions. In some cases it is not perceived subjectively; in others, it is accompanied by palpitations.

A distinction is made between sinus tachycardia, or the accelerated generation of impulses in the sinus node of the heart, and paroxysmal tachycardia. Sinus tachycardia, manifested by contractions generally ranging between 90 and 120 per minute, may be caused by such physiological factors as increased environmental temperature, physical and mental tension, or the ingestion of food. Sinus tachycardia may also be caused by such pathological states as fever, anemia, diffuse toxic goiter, heart failure, and neurasthenia. Nervous and humoral influences on the heart, such as adrenalin and thyroxine, are important contributing factors in the genesis of sinus tachycardia. The accelerated rhythm of cardiac contractions may have an unfavorable effect on metabolism in the myocardium and on blood circulation. When tachycardia is a symptom of disease, the underlying disease is treated.

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Benign prostatic hypertrophy
Benign prostatic hypertrophy
Benign prostatic hypertrophy
benign pseudohypertrophic muscular dystrophy
Benign Recurrent Intrahepatic Cholestasis
Benign scapuloperoneal muscular dystrophy with early contractures
Benign Sclerosing Ductal Proliferation
Benign Self-Mutilation
Benign Self-Mutilation
Benign Senescent Forgetfulness
benign stupor
Benign Summer Light Eruption
Benign Synovioma
benign tertian malaria
benign theileriosis
benign thrombocytosis
Benign Thunderclap Headache
benign tumor
benign tumor
benign tumor
Benign tumors
Benign tumors
Benign tumors
benign tumour
benign tumour
benign tumour
Benign tumours
Benign tumours
Benign tumours
Benign tumours

benign ventricular tachycardia

benign virus
benign volumetric growths of the liver
benignancies
benignancies
benignancies
benignancy
benignancy
benignancy
benignant
benignant
benignant
benignantly
benignantly
Bénigne Dauvergne de Saint-Mars
benignitas
benignities
benignities
benignity
benignity
benignity
benignity
benignly
benignly
benignly
benignly
Benigno Ninoy S. Aquino High School
Benignus
Benikoji
Benilde-St. Margaret's
Benilyn Childrens Chesty Coughs

Tachycardia (redirected from benign ventricular tachycardia)

tachycardia

Tachycardia
(redirected from benign ventricular tachycardia)