nonpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.2  Twitter.onpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.
When is a barrel chest a sign of a disease process? Chronic obstructive pulmonary disease (COPD) is the most common instance in which a barrel chest will occur. In these cases, itâs a sign of the lungs being over-expanded. This is caused by the loss of elasticity and results in the person having hyper-inflated lungs.
A Dr. Douglas E. Severance, MD , Family Medicine, answered. Chronic lung disease, such as COPD (chronic obstructive pulmonary disease), can cause atrial fibrillation. Not only can lung disease trigger atrial fibrillation, but so can the medications used to treat lung conditions such as asthma.