Noninvasive assessment of acute cardiopulmonary effects of an oral single dose of sildenafil in patients with idiopathic pulmonary hypertension.

Abstract:

:We aimed to assess the acute cardiopulmonary effects of a 100-mg oral single dose of sildenafil in patients with idiopathic pulmonary hypertension (IPAH) using a well-validated but less-used noninvasive echocardiographic method for the measurement of both systolic and diastolic pulmonary artery pressure (PAP), by tricuspid regurgitation (TR) velocity curve analysis. We studied 12 consecutive patients with IPAH (10 patients with New York Heart Association functional class III, and 2 patients with functional class II). A 100-mg oral single dose of sildenafil was added to previous medications of all patients and its immediate effects were evaluated 1, 5, and 12 h after treatment. Using paired analysis, administration of a 100-mg oral single dose of sildenafil led to a significant reduction in mean PAP and a remarkable increase in pulmonary acceleration time (PAT) 1 h after treatment (P = 0.000; 95% confidence interval [CI] 18.99-26.00 and P = 0.005; 95% CI -12.89 to -2.95, respectively). In addition, although the right heart dimensions (right atrium and right ventricle) showed a trend toward improvement, the differences were not statistically significant (P = 0.13 and P = 0.08, respectively). Our results demonstrated that Doppler examination of TR alone can be easily used for the estimate of systolic and diastolic PAP in patients with IPAH. This study also shows that sildenafil is the only drug given orally that can evaluate the vasodilatory capacity of the pulmonary vascular bed in patients with IPAH, with promising effects on mPAP and PAT in these patients.

journal_name

Heart Vessels

journal_title

Heart and vessels

authors

Behzadnia N,Najafizadeh K,Sharif-Kashani B,Dameshghi DO,Shahabi P

doi

10.1007/s00380-009-1208-4

subject

Has Abstract

pub_date

2010-07-01 00:00:00

pages

313-8

issue

4

eissn

0910-8327

issn

1615-2573

journal_volume

25

pub_type

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