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 Causes. Atrial flutter may be caused by abnormalities or diseases of the heart, by a disease elsewhere in the body that affects the heart, or by consumption of substances that change the way electrical impulses are transmitted through the heart. In some people, no underlying cause is ever found.Heart diseases or abnormalities that can cause atrial flutter include the following: 1  Decreased blood flow to the heart (ischemia) due to coronary heart disease, atherosclerosis, or a blood clot.2  High blood pressure (hypertension). 3  Disease of the heart muscle (cardiomyopathy).n some people, no underlying cause is ever found. Heart diseases or abnormalities that can cause atrial flutter include the following: 1  Decreased blood flow to the heart (ischemia) due to coronary heart disease, atherosclerosis, or a blood clot.