the graphic record produced by tacho graphy.
the recording of the movement and speed of the blood current.
word element. [Gr.] rapid, swift.
tachycardia associated with an irregularity in the normal heart rhythm. Includes atrial tachycardia, sinus tachycardia, premature ventricular contractions, atrial flutter, atrial fibrillation and ventricular tachycardia.
re-entrant t. one caused by a depolarization wave crossing areas of nonuniform conduction and excitability.
abnormally rapid heart rate.
atrial t. rapid contraction of the atrium arising from an ectopic focus in the atrium. The heart rate remains normal.
ectopic t. rapid heart action in response to impulses arising outside the sinoatrial node.
idioventricular t. one occurring as a compensation for a sinus bradycardia and A-V block.
junctional t. that arising in response to impuls...
a genus of oxyurid worms, in the superfamily Oxyuroidea, found in the large intestine of tortoises.
an instrument for measuring rapidity of motion.
1. rapid immunization against the effect of toxic doses of an extract by previous injection of small doses of it. 2. rapidly decreasing response to a drug or physiologically active agent after administration of a few doses.