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.
First-degree heart block is fairly common. It is seen in teenagers, young adults and in well-trained athletes. The condition may be caused by rheumatic fever, some types of heart disease and by some drugs. First-degree heart block produces no symptoms.