Does maintain consistency with a high quality of cardiac compression force between diastole and systole phase?

The aim of the study was to analyze the cardiac compression force using the vertical force with normalized (100%) in cardiopulmonary resuscitation. Nineteen subjects with basic life support license and instructor career participated in this study. Cardiac compression was performed in a situation positioned practical manikin on ground reaction force and with 1,000 Hz of sample rate. Cardiac compression force in vertical direction showed significant difference among 30 times cardiac compression. Vertical cardiac compression force (N) showed significant difference according to the 30 times of cardiac compression in each diastole (45.79 N) and systole (714.38 N) phase. Also, normalized vertical force showed significant difference according to the 30 times cardiac compression in each diastole (6.80%) and systole (93.20%) phase. This suggests that there is a greater difficulty in performing diastole forces close to 0% than performing a sufficient maximal cardiac compression force in cardiopulmonary resuscitation.