Decreased diaphragm excursion in stroke patients with dysphagia as assessed by M-mode sonography.

Objective: To record diaphragm excursion via M-mode ultrasonography in stroke patients with dysphagia and determine whether they present reduced diaphragm excursion during voluntary cough compared with stroke patients without dysphagia and healthy subjects.

Design: Prospective cross-sectional study.

Setting: University rehabilitation hospital.