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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Increased alveolar O2 concentration is due to which of the following condition?
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The correct answer is  A high V/Q ratio increases paO2 and decreases paCO2. This finding is typically associated with pulmonary embolism (where blood circulation is impaired by an embolus). A high V/Q can also be observed in COPD as a maladaptive ventilatory overwork of the undamaged lung parenchyma. In Asthma and Pulmonary hemorrhage there is decreased O2 concentration.