The flow-time waveform predicts respiratory system resistance and compliance.

Purpose: Knowledge of patients' lung compliance and resistance aids clinical management. We investigated whether these values, readily measured during volume assist-control ventilation (VACV), could also be estimated during pressure assist-control ventilation (PACV).

Methods: Data were collected in 12 mechanically ventilated human subjects.

Electrocardiographic changes in coronary endothelial dysfunction.

Objective: Coronary endothelial dysfunction is the early stage of coronary artery disease. We documented the incidence and type of electrocardiographic changes during acetylcholine-induced coronary endothelial dysfunction.

Methods: Endothelial function studies were performed with intracoronary injections of 10(-6), 10(-5), and 10(-4) mmol/l acetylcholine.