| 摘要 |
PURPOSE:To obtain a display area of blood flows in an opposite direction to be balanced by discriminating diffusion and contraction timings of the ventricle by a heart action detecting means, and reversing a scanning direction in the diffusion and contraction timings of the ventricle by a scanning direction control means. CONSTITUTION:An electrode 20 is pasted to a predetermined body surface position in the vicinity of the heart, and an ECG waveform is obtained by the electrode 20 an an ECG receiving amplifier 21. The heart H is placed in contraction timing of the left ventricle S for a predetermined period from generation of an R wave thereafter is diffusion timing. That is, for the predetermined period from the generation of the R wave, a blood flow beta in direction of flow out from the left ventricle S is generated, thereafter a blood flow alpha in a direction of flow-in to the left ventricle S is generated. However, since a scanning direction is in the counterclockwise direction for the predetermined period from the generation of the R wave, the direction of the blood flow betaagrees with the scanning direction. While because the scanning thereafter is in the clockwise direction, the direction of the blood flow alpha also agrees with the scanning direction. Accordingly, a wide display area is obtained in both the blood flows alphaand beta because the direction of the blood flow agrees with the scanning direction. |
