Please select the eligibility criteria that correspond to the clinical trial below.
Title: Sildenafil Trial of Exercise Performance in Idiopathic Pulmonary Fibrosis
Brief Summary: Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease that affects an individual's ability to breathe. This study will evaluate the effectiveness of sildenafil, a medication that increases blood flow to the lungs, at improving breathing function, exercise capacity, and quality of life in people with advanced IPF.


Options:
A: Inclusion Criteria:

* Male and female patients 18-75 years old, with symptomatic PAH
* PAH belonging to the following subgroups of the updated Dana Point Clinical Classification Group 1 (Idiopathic, or Heritable, or Drug or toxin induced, or Associated (APAH) with Connective tissue disease, Congenital heart disease with simple systemic-to-pulmonary shunt at least 1 year after surgical repair, or HIV infection)
* Documented hemodynamic diagnosis of PAH by right heart catheterization, performed at any time prior to Screening
* Six minute walk distance (6MWD) between 50 and 450 m at Screening within 2 weeks prior to the Baseline Visit
* Signed informed consent

Exclusion Criteria:

* Patients with pulmonary hypertension (PH) in the Updated Dana Point Classification Groups 2-5, and PAH Group 1 subgroups that are not covered by the inclusion criteria
* Patients who have received prostacyclin or its analogs within 1 month before Baseline Visit, or are scheduled to receive any of these compounds during the trial
* Patients with moderate or severe obstructive lung disease
* Patients with moderate or severe restrictive lung disease
* Patients with moderate or severe hepatic impairment (Child-Pugh B and C)
* Patients with documented left ventricular dysfunction
* Patients with severe renal insufficiency
* Patients with BMI \<18.5 Kg/m2
* Patients who are receiving or have been receiving any investigational drugs within 1 month before the Baseline Visit
* Acute or chronic impairment (other than dyspnea), limiting the ability to comply with study requirements, in particular with 6MWT
* Recently conducted or planned cardio-pulmonary rehabilitation program based on exercise training
* Psychotic, addictive or other disorder limiting the ability to provide informed consent or to comply with study requirements
* Life expectancy less than 12 months
* Females who are lactating or pregnant or plan to become pregnant during the study
* Known hypersensitivity to any of the excipients of the drug formulations
B: Inclusion Criteria:

* Clinical diagnosis of IPF
* Diffusing capacity of the lung (DLCO) level less than 35% (adjusted for hemoglobin)

Exclusion Criteria:

* Current enrollment in another investigational study
* Six-minute walk distance of less than 50 meters at screening or study entry
* Difference of greater than 15% between the screening and study entry 6-minute walk distance
* Acute or long-term impairment other than dyspnea (e.g., angina pectoris, intermittent claudication) that limits the ability to comply with the 6-minute walk test or other study requirements
* Forced Expiratory Volume 1-second (FEV1)/forced vital capacity (FVC) ratio of less than 0.65 after bronchodilator use
* Extent of emphysema greater than the extent of fibrotic change (e.g., honeycombing, reticular changes) on high-resolution computed tomography (HRCT) scan
* Acute heart attack within the 6 months prior to study entry
* Nitrate use
* Hypersensitivity to sildenafil or any component of the formulation
* Presence of aortic stenosis (AS)
* Life-threatening arrhythmia within 1 month of study entry
* Diabetes mellitus requiring insulin therapy
* Second-degree or third-degree atrioventricular (AV) block on electrocardiogram
* Severe chronic heart failure, defined by left ventricular ejection fraction (LVEF) of less than 25%
* Presence of idiopathic hypertrophic subaortic stenosis (IHSS)
* Hypotension (i.e., systolic blood pressure \[SBP\] less than 100 mm Hg or diastolic blood pressure \[DBP\] less than 50 mm Hg)
* Uncontrolled systemic hypertension (i.e., SBP greater than 180 mm Hg or DBP greater than 100 mm Hg)
* Known penile deformities or conditions (e.g., sickle cell anemia, multiple myeloma, leukemia) that may predispose participant to priapism
* Aspartate aminotransferase (AST), serum glutamic pyruvic transaminase (SGPT), alanine aminotransferase (ALT), or serum glutamic oxaloacetic transaminase (SGOT) greater than three times the upper limit of normal range
* Kidney impairment (i.e., creatinine clearance less than 30 mL/minute)
* Current drug or alcohol dependence
* Retinitis pigmentosa
* History of vision loss
* History of nonarteritic ischemic optic neuropathy
* Recently initiated pulmonary rehabilitation within 30 days of study entry. Participants will be prohibited from starting pulmonary rehabilitation during the study. Participants who are currently undergoing maintenance pulmonary rehabilitation at study entry will be asked to maintain their levels of rehabilitation for the duration of the study.
* Use of any investigational therapy as part of a clinical trial for any medical condition within 30 days of study entry
* Start or change in dose of treatment for IPF investigational agent (e.g., interferon gamma-1b, pirfenidone, etanercept, N-acetylcysteine, any other investigational agent intended to treat IPF), corticosteroids, or cytotoxic agents within 30 days of study entry
* Use of certain medications. More information about this criterion can be found in the study protocol.
* Treatment for pulmonary hypertension with prostaglandins (e.g., epoprostenol, treprostinil), endothelin-1 antagonists (e.g., bosentan, sitaxsentan, ambrisentan), or any other phosphodiesterase inhibitor (e.g., tadalafil, vardenafil) within 30 days of study entry
* Addition or discontinuation of calcium channel blockers, digitalis, diuretics, or vasodilators within 30 days of study entry (dosage must be stable for 7 days prior to study entry \[except for diuretics\])
* Currently on the waiting list for a lung transplant
* Use of L-arginine supplements
* Use of grapefruit juice or St. John's wort
* Pregnant or breastfeeding
* Resting saturation of peripheral oxygen (SpO2) (i.e., oxygen saturation measured using pulse oximetry) less than 92% with 6 liters of supplemental oxygen
C: Inclusion Criteria:

* Patients who have completed 16 weeks of treatment in the double blind trial CHEST 1

Exclusion Criteria:

* Patients who have an ongoing serious adverse event from CHEST 1 that is assessed as related to BAY63-2521 are not allowed to participate in the extension trial
D: Inclusion Criteria:

* COPD, FEV1 \< 80% ref. and FEV1/FVC \< 0.7 post bronchodilator
* Age 40-80 years
* Pulmonary hypertension
* Consent to participate in the study

Exclusion Criteria:

* Pulmonary or extrapulmonary disease that modifies gas exchange or pulmonary hemodynamics
* Recent exacerbation (\<4 weeks) (temporally)
* Patients treated with nitrates or CYP3A4 inhibitors (ketoconazole, itraconazole, ritonavir)
* Ischemic optic neuropathy
* Patients treated with phosphodiesterase-5 inhibitors
* Patients with ischemic cardiopathy
* Systemic disease that could modified the results
* Patients unable to practise exercise

Answer: B