Sildenafil for pulmonary hypertension
Abstract
BACKGROUND: Pulmonary Hypertension (PH) can be either of unknown aetiology (primary pulmonary hypertension (PPH)) or due to a known underlying cause (secondary pulmonary hypertension (SPH). Pulmonary arteriolar vasoconstriction is considered to be an important characteristic of PH. Therapies which aim to vasodilate are used to treat pulmonary hypertension. OBJECTIVES: To determine the clinical efficacy of sildenafil, a vasodilator which works through inhibition of the enzyme phosphodiesterase type V (PDE5I), administered via any route to people with pulmonary hypertension in primary or secondary forms. SEARCH STRATEGY: Electronic databases were searched with pre-defined search terms. Searches were current as of November 2003. SELECTION CRITERIA: Randomised controlled trials were considered for inclusion in the review. We included studies which assessed the effects of sildenafil in participants with PPH and SPH. DATA COLLECTION AND ANALYSIS: Two reviewers independently assessed and extracted data from clinical trials. Data were entered in RevMan Analyses 1.0.2. Continuous data were pooled with an estimate on either WMD (weighted mean difference) or SMD (standardised mean difference) scales. Dichotomous data were pooled and a RR (relative risk) was calculated. MAIN RESULTS: Four studies recruiting 77 participants met the inclusion criteria of the review. Two studies assessed the acute effects of sildenafil. Two small crossover study assessed the effects of long term…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 77 participants or records.
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