CLINICAL STUDIES
Effect of orally active prostacyclin analogue on survival of outpatients with primary pulmonary hypertension
Noritoshi Nagaya, MD*,
Masaaki Uematsu, MD, PhD ,
Yoshiaki Okano, MD ,
Toru Satoh, MD, PhD*,
Shingo Kyotani, MD, PhD*,
Fumio Sakamaki, MD, PhD*,
Norifumi Nakanishi, MD, PhD*,
Kunio Miyatake, MD, PhD, FACC* and
Takeyoshi Kunieda, MD, PhD
* Division of Cardiology, Department of Medicine, National Cardiovascular Center, Osaka, Japan
Cardiovascular Division, Osaka Police Hospital, Osaka, Japan
Department of Clinical Laboratory Medicine, Kyoto University Hospital, Kyoto, Japan
Department of Medicine, Ise Keio Hospital, Keio University, Mie, Japan
Manuscript received May 28, 1998;
revised manuscript received May 4, 1999,
accepted June 11, 1999.
Reprint requests and correspondence: Noritoshi Nagaya, MD, Division of Cardiology, Department of Medicine, National Cardiovascular Center, 5-7-1 Fujishirodai, Suita, Osaka 565, Japan
OBJECTIVES
This study sought to investigate the effect of beraprost sodium (BPS), an orally active prostacyclin analogue, on the survival of outpatients with primary pulmonary hypertension (PPH).
BACKGROUND
Continuous intravenous administration of epoprostenol (prostacyclin) has been shown to improve survival in PPH. However, the effect of oral BPS on survival in PPH remains unknown.
METHODS
Fifty-eight consecutive patients with PPH who could be discharged after the first diagnostic catheterization for PPH were retrospectively divided into two groups: patients treated with BPS (BPS group, n = 24) and those without BPS (conventional group, n = 34). The baseline demographic and hemodynamic data did not significantly differ between the two.
RESULTS
Twenty-seven patients died of cardiopulmonary causes in the conventional group during a mean follow-up period of 44 ± 45 months. In contrast, only 4 patients died of cardiopulmonary causes in the BPS group during a mean follow-up period of 30 ± 20 months. In a subsample (n = 15) of patients in the BPS group, mean pulmonary arterial pressure and total pulmonary resistance significantly decreased, respectively, by 13% and 25% during a mean follow-up period of 53 days. Among the variables previously known to be associated with the mortality in PPH, the absence of BPS therapy and the reduced cardiac output were independently related to the mortality by a multivariate Cox proportional hazards regression analysis (both p < 0.05). The Kaplan-Meier survival curves demonstrated that the one-, two- and three-year survival rates for the BPS group were 96%, 86% and 76%, respectively, as compared with 77%, 47% and 44%, respectively, in the conventional group (log-rank test, p < 0.05).
CONCLUSIONS
The oral administration of BPS may have beneficial effects on the survival of outpatients with PPH as compared with conventional therapy alone.
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Abbreviations and Acronyms
| | BPS | = beraprost sodium | | PPH | = primary pulmonary hypertension |
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