Ritter M, Jenni R, Vieli A, Nonogi H, Krayenbühl H P
Medizinische Poliklinik, Universitätsspital, Zürich, Schweiz.
Ultraschall Med. 1987 Oct;8(5):212-4. doi: 10.1055/s-2007-1011697.
To characterise the duration of aortic flow velocity waveforms in hypertrophic obstructive cardiomyopathy (HOCM) the dynamics of aortic flow were investigated in 10 normals and 11 patients with hypertrophic obstructive cardiomyopathy performing 16-gated Doppler 2D-echocardiography of the ascending aorta. 16 flow velocities were recorded along the Doppler beam axis between the anterior and posterior aortic walls, and averaged over 8 beats. Flow times were derived from the flow curves and normalised by the ejection period as determined from the carotid pulse tracing. Thus, relative ejection time (% SEP) was calculated at the anterior (gate 4) and the posterior aortic wall (gate 13) as well as at the axis of the vessel (gate 9). In normals % SEP was 92 +/- 3% in gate 4, 95 +/- 4% in gate 9 and 93 +/- 3% in gate 13 (NS). In patients with HOCM % SEP was 92 +/- 5% in gate 4 and 83 +/- 4% (NS) in gate 9. At the posterior aortic wall (gate 13) % SEP amounted to 68 +/- 5% and was significantly lower than in gate 9 (P less than 0.05) and in gate 4 (P less than 0.001) respectively. It is concluded that in contrast to normals systolic flow time in hypertrophic obstructive cardiomyopathy varies along the sound beam in the ascending aorta. Flow time recorded at the posterior aortic wall is most abbreviated.
为了描述肥厚性梗阻性心肌病（HOCM）中主动脉流速波形的持续时间，对10名正常人和11名肥厚性梗阻性心肌病患者进行升主动脉16门控多普勒二维超声心动图检查，研究主动脉血流动力学。沿着主动脉前后壁之间的多普勒束轴记录16个流速，并在8个心动周期上取平均值。从血流曲线得出血流时间，并通过颈动脉脉搏描记法确定的射血期进行标准化。因此，计算了主动脉前壁（第4门）、后壁（第13门）以及血管轴（第9门）处的相对射血时间（%SEP）。在正常人中，第4门处的%SEP为92±3%，第9门处为95±4%，第13门处为93±3%（无显著性差异）。在肥厚性梗阻性心肌病患者中，第4门处的%SEP为92±5%，第9门处为83±4%（无显著性差异）。在主动脉后壁（第13门）处，%SEP为68±5%，分别显著低于第9门（P<0.05）和第4门（P<0.001）。结论是，与正常人相比，肥厚性梗阻性心肌病的收缩期血流时间在升主动脉中沿声束方向变化。在主动脉后壁记录的血流时间最短。
