omission (ÉÊËmÉªÊÉn) or omittance n 1. something that has been omitted or neglected 2. the act of omitting or the state of having been omitted [C14: from Latin omissiÅ, from omittere to omit] oËmissive adj oËmissiveness n. oâ¢misâ¢sion (oÊËmÉªÊ Én) n. 1. the act of omitting. 2. the state of being omitted.
Causes of Heart block. Heart block is caused by certain medications, surgery and primary disease (an infection). A child can also be born with heart block (congenital heart block). Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Heart block) that could possibly cause Heart block includes: 1  Heart attack. 2  Coronary artery disease. 3  Sinus node disease.  Congenital heart defect.
A heart attack, also called a myocardial infarction, is death of or damage to part of the heart muscle due to an insufficient blood supply. Heart attacks occur when one of the coronary arteries that supply blood to the heart muscle is blocked. Blockage is usually caused from a buildup of plaque (deposits of fat-like substances) due to atherosclerosis. If a plaque deposit tears or ruptures, a blood clot may form and block the artery, causing a heart attack.