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Table 1.

Haemodynamic variables for the in situ perfused Python molurus heart

Body mass (BM2.2±0.2 kg 
Ventricular mass (VM3.61±0.46 g 
Pressure in left atrium (PLAt0.20±0.02 kPa 
Pressure in right atrium (PRAt0.11±0.01 kPa 
Systemic arterial pressure (Psys6.3±0.0 kPa 
Pulmonary arterial pressure (Ppul6.3±0.1 kPa 
Heart rate (fH) 46±3 min-1 
Systemic flow (sys12.0±0.7 ml min-1 kg-1 
Pulmonary flow (pul12.8±0.9 ml min-1 kg-1 
Cardiac output (tot24.7±1.6 ml min-1 kg-1 
Total stroke volume (VS0.55±0.05 ml kg-1 
Systemic power output 1.22±0.07 mW kg-1 
Pulmonary power output 1.32±0.09 mW kg-1 
Total power output 2.53±0.15 mW kg-1 body mass 
Total power output 1.60±0.15 mW g-1 ventricular mass 
Body mass (BM2.2±0.2 kg 
Ventricular mass (VM3.61±0.46 g 
Pressure in left atrium (PLAt0.20±0.02 kPa 
Pressure in right atrium (PRAt0.11±0.01 kPa 
Systemic arterial pressure (Psys6.3±0.0 kPa 
Pulmonary arterial pressure (Ppul6.3±0.1 kPa 
Heart rate (fH) 46±3 min-1 
Systemic flow (sys12.0±0.7 ml min-1 kg-1 
Pulmonary flow (pul12.8±0.9 ml min-1 kg-1 
Cardiac output (tot24.7±1.6 ml min-1 kg-1 
Total stroke volume (VS0.55±0.05 ml kg-1 
Systemic power output 1.22±0.07 mW kg-1 
Pulmonary power output 1.32±0.09 mW kg-1 
Total power output 2.53±0.15 mW kg-1 body mass 
Total power output 1.60±0.15 mW g-1 ventricular mass 

These conditions were used as starting conditions in all experimental protocols and were attained by adjusting filling pressures of the two atria(PRAt and PLAt) so that the sys and pul were equal at 12-13 ml min-1 kg-1. Values are means ± S.E.M.(N=7).

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