<unk> , also known as cor pulmonale, is the enlargement and failure of the right ventricle of the<unk>  as a response to increased vascular resistance (such as from pulmonic stenosis) or high blood pressure in the lungs. Chronic<unk>  usually results in right ventricular hypertrophy (RVH), whereas acute<unk>  usually results in dilatation. Hypertrophy is an adaptive response to a long-term increase in pressure. Individual muscle cells grow larger (in thickness) and change to drive the increased contractile force required to move the blood against greater resistance. Dilatation is a stretching (in length) of the ventricle in response to acute increased pressure. To be classified as<unk> , the cause must originate in the pulmonary circulation system; RVH due to a systemic defect is not classified as<unk> . Two causes are vascular changes as a result of tissue damage (e.g. disease, hypoxic injury), and chronic hypoxic pulmonary vasoconstriction. If left untreated, then death may result. The<unk>  and lungs are intricately related; whenever the<unk>  is affected by a disease, the lungs risk following and vice versa.
Pulmonary heart disease
Asthma
Obstructive lung disease
Bronchopulmonary dysplasia
Chronic obstructive pulmonary disease
Pulmonary hypertension
Restrictive lung disease
Vocal cord dysfunction