Abstract
Materials and methods: Structures of hearts were observed by echocardiography during full expiration and inspiration phases of breathing. Investigator requested children for forceful breathing and asked to hold 5 seconds to observe parasternal long axis and short axis view. If children could not follow the investigator’s request, investigator tried to observe changes of heart position during normal breathing. Results: Forty children were enrolled. 24 (60%) were male and mean age was 6 (±2.4) years. At full expiration phases, 80% (32/40) of left ventricles were placed underneathinter-mammalian line. 10% (4/40) of left ventricles were found underneath just upper of inter-mammalian line and remains were found just below. Their left lobes of livers were placed under lower half level of sternum in all cases. Conclusions: This study has identified that, in children, left ventriclemightbeplacedbeneathupperormiddleof inter-mammalian line, not below inter-mammalian line. The proper location of chest compressionmight be a middle of inter-mammalian line for better cardiac output with avoidance of hepatic damage.
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