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The purpose of this study is to determine if sildenafil (Viagra) improves exercise tolerance.
Patients will undergo an exercise stress test. One dose of Sildenafil will then be given, followed by a one hour rest period. A repeat exercise stress test will then be repeated.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| sildenafil | Drug |
| Measure | Description | Time Frame |
|---|---|---|
| Patients will have exercise capacity measured by an exercise stress test before and after one dose of sildenafil. |
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Inclusion Criteria:
Age 18 - 75 Ejection fraction <35% Heart failure limited by fatigue and shortness of breath -
Exclusion Criteria:
Inability to exercise. Patients with shortness of breath while resting. Patient requiring intravenous medication. Patients taking the following medications: nitroglycerine pill/patch/paste, isordil and Imdur
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| Name | Affiliation | Role |
|---|---|---|
| Marc J Semigran, MD | Massachusetts General Hospital | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Massachusetts General Hospital | Boston | Massachusetts | 02114 | United States |
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| ID | Term |
|---|---|
| D006333 | Heart Failure |
| ID | Term |
|---|---|
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
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| ID | Term |
|---|---|
| D000068677 | Sildenafil Citrate |
| ID | Term |
|---|---|
| D013449 | Sulfonamides |
| D000577 | Amides |
| D009930 | Organic Chemicals |
| D013450 | Sulfones |
| D013457 |
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| Sulfur Compounds |
| D010879 | Piperazines |
| D006573 | Heterocyclic Compounds, 1-Ring |
| D006571 | Heterocyclic Compounds |
| D011687 | Purines |
| D006574 | Heterocyclic Compounds, 2-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |