(redirected from tachycardiac)
Also found in: Dictionary, Thesaurus, Medical.
Related to tachycardiac: tachycardia


see arrhythmiaarrhythmia
, 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.
..... Click the link for more information.



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.


Excessive rapidity of the heart's action.
References in periodicals archive ?
He was tachycardiac at 135 beats per minute and afebrile at 97.1 degrees Fahrenheit and blood pressure was 144/96 mmHg.
HR responses to MAP changes induced by sequential administration of SNP and PE included two phases: tachycardiac and bradycardic responses.
On general examination, he was tachycardiac, normotensive.
Upon examination she was hypotensive (85/49 mmHg), tachycardiac (110 bpm), and tachypneic (25 bpm).
On assessment he was noted to be tachycardiac and febrile.