Table 3: Parameters measured after 1 hour from the start of treatment.

After one hour Group C
(n = 25)
Group M
(n = 25)
Tests
Mean ± SD Mean ± SD t/X2 P-value
RR (cycles/min) 25.84 ± 3.15 21.35 ± 3.5 4.768 < 0.001**
PaO2 (mmHg) 72.67 ± 4.38 81.24 ± 5.09 6.381 < 0.001**
SpO2 93.24 ± 6.72 93.56 ± 7.54 0.158 0.874
pH 7.25 ± 0.07 7.29 ± 0.09 1.754 0.085
PaCO2 (mmHg) 43.84 ± 4.8 44.35 ± 5.1 0.364 0.717
No. requiring MV 9/16 (36%) 3/22 (12%) 3.947 0.047*

Data are presented as mean±standard deviation. Number of patients requiring mechanical ventilation expressed as percentage. Group C: standard pharmacotherapy and placebo, Group M: standard pharmacotherapy and 25 μg milrinone slow IV bolus, MV: mechanical ventilation, RR: respiratory rate, PaO2: arterial partial pressure of oxygen, SpO2: arterial oxygen saturation, pH: potential of hydrogen, PaCO2 arterial partial pressure of carbon dioxide. **Statistically highly significant *Statistically significant

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