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.
Heart block is a problem that occurs with the heart's electrical system. This system controls the rate and rhythm of heartbeats. (Rate refers to the number of times your heart beats per minute. With each heartbeat, an electrical signal spreads across the heart from the upper to the lower chambers. As it travels, the signal causes the heart to contract and pump blood. Heart block occurs if the electrical signal is slowed or disrupted as it moves through the heart.