Aims: To evaluate the correlation between the coronary sinus fow and the infusion volume in the coronaries and assess the performance of coronary sinus fow in predicting coronary artery occlusion in an isolated pig heart. Material and methods: The coronary sinus fow was measured in 16 isolated pig hearts by pulsed Doppler ultrasound. The correlation between the coronary sinus fow and the infusion volume in different coronary artery was analyzed, and the performance of coronary sinus fow in predicting different coronary artery occlusion was deducted. Results: There were no statistically signifcant differences between the coronary sinus fow and the infusion volume in different coronary artery (p>0.05). The correlations between the coronary sinus fow and the infusion volume in left anterior descending coronary artery (LAD), left circumfex coronary artery (LCX), LAD and LCX, and LAD, LCX and right coronary artery (RCA) were all higher than 0.85 (p<0.01), and those of RCA, LAD and RCA, and LCX and RCA were between 0.6 and 0.8 (p<0.05). The areas under the receiver operating characteristics curve (AUC) were all higher than 0.90 (p<0.05) in predicting any two coronaries occlusion (<50% and 100%) and three coronaries occlusion (<50%) with a >85% sensitivity and specifcity. Excepting RCA mild occlusion (<50%), AUCs in predicting one coronary occlusion (<50% and 100%) were between 0.7 and 0.9, with >80% sensitivity and specifcity. Conclusions: The coronary sinus fow measured by pulsed Doppler ultrasound can effectively and exactly refect the infusion volume in coronaries, which is a powerful indicator of coronary blood supply.
P2834An in vitro study on the influence of increased heart rate on the right ventricular kinetic energy and shear stresses
