Figure 2. RV pressure curves recorded with a high fidelity micromanometer
RV pressure was recorded using a high-fidelity micromanometer (Mikro-Cath™ Pressure Cather, Millar Inc., TX, USA). The pressure catheter was connected to an AV converter (PowerLab®, ADInstruments, Dunedin, New Zealand) and to a personal computer in which dedicated software (LabChart Pro®, ADInstruments, Dunedin, New Zealand) was installed. This software allowed for a pressure recording with 1,000 Hz and for an export of the data as a csv file. Zero level was determined while the tip of the catheter was placed just below the surface of warmed water put in a cup. The RV pressure was recorded at the natural end-expiration, and the dataset of the first cardiac cycle was used for drawing the PV loop of Figure 1.
RV, right ventricular
Supplementary material: The following supplementary material is available online (Codec ID: avc1)