Black spot (in French), a small ulcer covered with a black crust at the site of a tick bite, characteristic of several tick-borne rickettsial diseases.
A rapid heart rate, usually defined as greater than 100 beats per minute.
- Tachycardia, paroxysmal atrial
Paroxysmal atrial tachycardia .
- Tachycardia, sinus
A fast heartbeat (tachycardia) because of rapid firing of the sinoatrial (sinus) node. The sinoatrial (or sinus) node is the natural pacemaker of the heart. It is located in the wall of the right atrium (the right upper chamber of the heart). Normal cardiac impulses start there and are transmitted to the atria and down […]
- Tachycardia, ventricular
An abnormally rapid heart rhythm that originates from a ventricle, one of the lower chambers of the heart. Although the beat is regular, ventricular tachycardia is life-threatening because it can lead to a dreaded condition, ventricular fibrillation. In ventricular fibrillation, the ventricles beat rapidly in a chaotic, purposeless fashion. The heart cannot pump blood effectively […]
Having to do with touch. For example, tactile signs of disease are signs that are perceptible by touch, such as roughness of the skin.