Bronchial Diseases [Disease/Finding] Bronchial Hyperreactivity [Disease/Finding] Tendency of the smooth muscle of the tracheobronchial tree to contract more intensely in response to a given stimulus than it does in the response seen in normal individuals. This condition is present in virtually all symptomatic patients with asthma. The most prominent manifestation of this smooth muscle contraction is a decrease in airway caliber that can be readily measured in the pulmonary function laboratory. 1027389 C7040 195967001 Bronchial Hyperreactivity M0025237 N0000003431 C0085129 Bronchial Hyperreactivity D016535