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| Name | Class |
|---|---|
| Ludwig Boltzmann Institute for Lung Vascular Research | OTHER |
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Actual studies suggest that a calcium activated chlorid channel (TMEM16A) may play a relevant role in the pathogenesis of pulmonary arterial hypertension (PAH). The inhibition of this channel led to pulmonary vasorelaxation in preclinical studies. Benzbromarone is a well known inhibitor of the TMEM16A channel and is used in patients with gout.
In this pilot study the investigators plan to investigate if Benzbromarone has an acute effect on the pulmonary arteries in humans. This will be investigated within the frame of a right heart catheterization performed in patients with known PAH due to clinical reasons. The investigators hypothesize that the application of Benzbromarone leads to pulmonary vasodilation, which can be recognized by the decrease in pulmonary vascular resistance. In addition, the change in pulmonary and systemic arterial pressure, pulmonary arterial wedge pressure, heart rate and arterial oxygen saturation will be assessed. Due to clinical reasons patients will receive NO (15 ppm) during right heart catheterization. Hemodynamic changes upon NO and Benzbromarone may be compared.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Benzbromarone | Experimental | 1x200mg Benzbromarone |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Benzbromarone | Drug | 1x200mg Benzbromarone will be applied after baseline measurements during right heart catheterization. The effects of the drug on the pulmonary hemodynamics will be assessed after 2 hours. |
| Measure | Description | Time Frame |
|---|---|---|
| Pulmonary vascular resistance (Wood units) assessed by right heart catheterization | 2 hours |
| Measure | Description | Time Frame |
|---|---|---|
| Mean pulmonary arterial pressure (mmHg) assessed by right heart catheterization | 2 hours | |
| Mean systemic arterial pressure (mmHg) assessed by sphygmomanometer | 2 hours | |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Horst Olschewski, MD | Medical University of Graz | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Medical University of Graz | Graz | 8036 | Austria |
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| ID | Term |
|---|---|
| D065627 | Familial Primary Pulmonary Hypertension |
| ID | Term |
|---|---|
| D006976 | Hypertension, Pulmonary |
| D008171 | Lung Diseases |
| D012140 | Respiratory Tract Diseases |
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| ID | Term |
|---|---|
| D001553 | Benzbromarone |
| ID | Term |
|---|---|
| D001572 | Benzofurans |
| D006574 | Heterocyclic Compounds, 2-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |
| D006571 | Heterocyclic Compounds |
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| arterial oxygen saturation 8%) assessed by arterial blood gas analysis |
| 2 hours |