Dictionary entry overview: What does spiny mean? â¢ SPINY (adjective) The adjective SPINY has 2 senses: 1. having spines 2. having or covered with protective barbs or quills or spines or thorns or setae etc. Familiarity information: SPINY used as an adjective is rare.
Atrial Flutter Overview. Atrial flutter is an abnormality of the heart rhythm, resulting in a rapid and sometimes irregular heartbeat. Such abnormalities, whether in the rate or regularity of the heartbeat, are known as arrhythmias. The beating of the heart is controlled by electrical impulses.
Atrial Flutter & Atrial Tachycardia. Typical atrial flutter results from a single short-circuit in the right atrium. This short-circuit causes the atria to beat at about 300 beats per minute while the lower chamber of the heart (the ventricles) beat at a slower rate (often 75 to 150 beats per minute). Like atrial fibrillation, atrial flutter occurs most commonly in elderly patients and those with other types of heart disease.