The left ventricular pseudotendinous band is a fibrous-like structure attached to other locations in the left ventricular cavity, in addition to the chordae tendineae connecting the papillary muscles and the mitral valve leaflets. The diagnostic rates of various left ventricular pseudotendinous bands vary, with results from 0.2 to 71% in transthoracic echocardiography, showing a huge difference, especially in the absence of large-scale clinical epidemiological research on the prevalence of left ventricular pseudotendinous band. We establish the incidence of left ventricular pseudotendinous band in the population based on our research on 1650 subjects.

A continuous selection of 1650 subjects was made, using two-dimensional echocardiographic imaging, multiplane and multifocal examination of the left ventricular pseudotendinous band, to analyze the detection rate of total left ventricular pseudotendinous band, detection rate of left ventricular pseudotendinous band among different ages and genders, arrhythmia and non-arrhythmia, and the composition ratio of the location of left ventricular pseudotendinous band.

Of the 1650 subjects tested, 1311 were found to have a left ventricular pseudotendinous band, with a detection rate of 79%; a total of 1512 left ventricular pseudotendinous bands were detected. There was no statistically significant difference in the detection rate of left ventricular pseudotendinous band between men and women, or between those with and without arrhythmia (P>0.05); there was no statistically significant difference in the detection rate between those aged ≥40 and those aged <40 (P>0.05). The left ventricular pseudotendinous band originating from the apex of the interventricular septum and terminating at the acid wall of the left ventricle atrial segment accounted for 83% of the total (1254/1512), and 96% of the positive samples.

The incidence of left ventricular pseudotendinous band is extremely high in the general population, especially the diagnosis rate of the left ventricular pseudotendinous band originating from the apex of the interventricular septum and terminating at the acid wall of the left ventricle atrial segment. Echocardiography is most beneficial for identifying the camera position of this left ventricular pseudotendinous band, which is on the basic level of the upper or lower rib intercostal space of the left ventricular short axis view of the scapula, with a slight adjustment of the beam angle.

The left ventricular pseudotendinous band, originating from the apex of the interventricular septum and terminating at the acid wall of the left ventricle atrial segment, is possibly a normal structure within the left ventricular cavity of the heart; its function is to maintain the stability and immobility of the left ventricular short axis, the atrioventricular plane, or even as a branch of the transmission system with the function of transmission, all of which are issues that require further scientific research.