In normal lungs, regional perfusion closely matches regional ventilation because arteriolar vasoconstriction occurs in response to alveolar hypoxia. read more and asthma Asthma Asthma is a disease of diffuse airway inflammation caused by a variety of triggering stimuli resulting in partially or completely reversible bronchoconstriction. Alpha-1 antitrypsin deficiency and various occupational. Low V/Q ratio is one of the more common reasons for hypoxemia and contributes to the hypoxemia occurring in COPD Chronic Obstructive Pulmonary Disease (COPD) Chronic obstructive pulmonary disease (COPD) is airflow limitation caused by an inflammatory response to inhaled toxins, often cigarette smoke. Patients with anemia have lower DLCO values that correct when adjusted for hemoglobin values.
Reduced DLCO also occurs in patients with previous lung resection because total lung volume is smaller, but DLCO corrects to or even exceeds normal when adjusted for V A because increased additional vascular surface area is recruited in the remaining lung. read more, decrease both DLCO and alveolar ventilation (V A). Symptoms and signs develop over months to years and include. read more and pulmonary fibrosis Idiopathic Pulmonary Fibrosis Idiopathic pulmonary fibrosis (IPF), the most common form of idiopathic interstitial pneumonia, causes progressive pulmonary fibrosis. Conditions that affect the lung diffusely, such as emphysema Chronic Obstructive Pulmonary Disease (COPD) Chronic obstructive pulmonary disease (COPD) is airflow limitation caused by an inflammatory response to inhaled toxins, often cigarette smoke. read more and pulmonary embolism Pulmonary Embolism (PE) Pulmonary embolism (PE) is the occlusion of pulmonary arteries by thrombi that originate elsewhere, typically in the large veins of the legs or pelvis. In pulmonary hypertension, pulmonary vessels may become constricted. It has many secondary causes some cases are idiopathic.
Conditions that primarily affect the pulmonary vasculature, such as primary pulmonary hypertension Pulmonary Hypertension Pulmonary hypertension is increased pressure in the pulmonary circulation.
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