Clinical Trials

Are you an adult with pulmonary arterial hypertension (PAH) and currently taking vasodilators? This study is testing the efficacy of a new medicine called famotidine for people with PAH. Participants in this study must be between 18 and 80 years old and willing to take famotidine or a placebo for 6 months. This study takes place in Seattle, Washington.

Demonstrating the feasibility, effectiveness, and cost-effectiveness of electronically delivered smoking cessation interventions via patient portals in Federally Qualified Health Care (FQHC) settings has the potential for wide-spread dissemination and significant public health impact. on patient populations with demonstrated high rates of smoking.

The purpose of this study is to examine the acute effects of nicotine free electronic cigarette aerosol on vascular function in healthy, non-smokers.

The investigators will study the effect of pulmonary arterial vasodilation to see if it eliminates indices of persistent lung injury in smokers that are susceptible to emphysema.

The purpose of this study is to examine the acute effects of nicotine free electronic cigarette aerosol on vascular function in healthy, non-smokers.

This study will use dual energy x-ray computed tomography (DECT) to evaluate the relationship between heterogeneous perfusion, hypoxia (low oxygen in inspired gas) and induction of pulmonary vascular dilatation to characterize emphysema susceptibility in a normal smoking population.