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.
The World Health Organization classifies human. pulmonary hypertension into five groups based on the. inciting cause (see box on page 7). Pulmonary hypertension causes pressure overload. on the right heart and can result in right ventricular. enlargement (concentric hypertrophy or thickening). This is called cor pulmonale. Acute cor pulmonale, most often caused by massive thromboembolic dis-. ease, results in right ventricular dilation, tricuspid.