The following parameter settings were applied.
Cine-FLASH was used to acquire temporally resolved dynamic short-axis and long-axis images of the heart with the following parameters: TReff = RR-interval, TE = 1.8 ms, flip angle = 30°, field of view, 25 × 25 mm; acquisition matrix, 128 × 128 pixels; slice thickness, 1 mm.
Afterwards, mechanical ventilation was set according to the following parameters: VT = 6 ml/kg, RR = 80 bpm, PEEP = 5 cmH2O, and FiO2 = 0.3.
The following parameters were investigated: P wave duration, RR interval, PR interval, QTpeak and QT intervals.
The animals were then paralyzed (vecuronium bromide 2 mg/kg, intravenously) and mechanically ventilated (Servo i, MAQUET, Switzerland) with the following parameters: VT = 6 ml/kg, respiratory rate (RR) = 80 breaths/min, inspiratory to expiratory ratio = 1 2, fraction of inspired oxygen (FiO2) = 1.0, and PEEP equal to 0 cmH2O (zero end-expiratory pressure (ZEEP)).
The following parameters were ascertained daily: arterial blood gas analysis, respiratory rate (RR), tidal volume (Vt), minute ventilation (Ve), patients' comfort, number of respiratory distress that needed changes in ventilatory mode and failure to wean.
With the following parameters.
using the following parameters.
The following parameters of APs with more than 10 seconds of stable baselines were measured: AP amplitude (APA), maximum diastolic potential (MDP), maximal upstroke velocity (Vmax), AP duration at 90% of the repolarization (APD90), and the cycle-length between two spontaneous APs (RR).
The following parameters were applied.
