During an acute asthma attack, which statement best describes the FEV1/FVC ratio?

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Multiple Choice

During an acute asthma attack, which statement best describes the FEV1/FVC ratio?

Explanation:
In acute asthma, airway narrowing from bronchospasm and inflammation creates more resistance to expiration. This reduces how much air you can forcefully blow out in the first second (FEV1) much more than the total amount you can exhale (FVC). Because FEV1 falls disproportionately, the FEV1/FVC ratio decreases. This pattern is typical of obstructive airways disease and becomes more pronounced during an acute attack. By contrast, in restrictive disease the ratio tends to stay normal or even be higher because both FEV1 and FVC decline together in parallel.

In acute asthma, airway narrowing from bronchospasm and inflammation creates more resistance to expiration. This reduces how much air you can forcefully blow out in the first second (FEV1) much more than the total amount you can exhale (FVC). Because FEV1 falls disproportionately, the FEV1/FVC ratio decreases. This pattern is typical of obstructive airways disease and becomes more pronounced during an acute attack. By contrast, in restrictive disease the ratio tends to stay normal or even be higher because both FEV1 and FVC decline together in parallel.

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