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  • Title: Inhaled levosimendan versus intravenous levosimendan in patients with pulmonary hypertension undergoing mitral valve replacement.
    Author: Kundra TS, Nagaraja PS, Bharathi KS, Kaur P, Manjunatha N.
    Journal: Ann Card Anaesth; 2018; 21(3):328-332. PubMed ID: 30052230.
    Abstract:
    CONTEXT: Inhaled levosimendan may act as selective pulmonary vasodilator and avoid systemic side effects of intravenous levosimendan, which include decrease in systemic vascular resistance (SVR) and systemic hypotension, but with same beneficial effect on pulmonary artery pressure (PAP) and right ventricular (RV) function. AIM: The aim of this study was to compare the effect of inhaled levosimendan with intravenous levosimendan in patients with pulmonary hypertension undergoing mitral valve replacement. SETTINGS AND DESIGN: The present prospective randomized comparative study was conducted in a tertiary care hospital. SUBJECTS AND METHODS: Fifty patients were randomized into two groups (n = 25). Group A: Levosimendan infusion was started immediately after coming-off of cardiopulmonary bypass and continued for 24 h at 0.1 mcg/kg/min. Group B: Total dose of levosimendan which would be given through intravenous route over 24 h was calculated and then divided into four equal parts and administered through inhalational route 6th hourly over 24 h. Hemodynamic profile (pulse rate, mean arterial pressure, pulmonary artery systolic pressure [PASP], SVR) and RV function were assessed immediately after shifting, at 1, 8, 24, and 36 h after shifting to recovery. STATISTICAL ANALYSIS USED: Intragroup analysis was done using paired student t-test, and unpaired student t-test was used for analysis between two groups. RESULTS: PASP and RV-fractional area change (RV-FAC) were comparable in the two groups at different time intervals. There was a significant reduction in PASP and significant improvement in RV-FAC with both intravenous and inhalational levosimendan. SVR was significantly decreased with intravenous levosimendan, but no significant decrease in SVR was observed with inhalational levosimendan. CONCLUSIONS: Inhaled levosimendan is a selective pulmonary vasodilator. It causes decrease in PAP and improvement in RV function, without having a significant effect on SVR.
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