Following disorders predispose to Cor pulmonale or right heart failure.

1. Disease of the pulmonary parenchyma.

a) Chronic Obstructive Pulmonary disease
b) Diffuse Pulmonary interstitial fibrosis
c) Pneumoconiosis
d) Cstic Fibrosis
e) Bronchiectasis

2. Disease Of pulmonary vessels.

a) Recurrent pulmonary thromboembolism
b) Primary Pulmonary hypertension
c) Extensive pulmonary arteritis (eg, in Wegener's granulomatosis)
e) Drug, toxin or radiation induced vascular obstruction
f) Extensive pulmonary tumor and micro- emobolism

3. Disorders Affecting Chest Movements.

a) Kyphoscoliosis
b) Marked Obesity (eg, Pickwickian Syndrome)
c) Neuromuscular disease

4. Others:

a) Metabolic acidosis
b) Hypoxemia
c) Chronic altitude sickness
e) Idiopathic alveolar hypo-ventilation.

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