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| Two-dimensional speckle tracking technology in evaluation of papillary muscle function in
patients with hypertrophic cardiomyopathy |
| BAI Ruo-cen, GUO Jie, SUN Dan-dan, YANG Jun |
| Department of Cardiovascular Ultrasound, the First Affiliated Hospital of China Medical University, Shenyang 110001, China |
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Abstract Objective: To evaluate the longitudinal contractile function, synchrony and location of papillary muscle in patients with hypertrophic cardiomyopathy(HCM) with two-dimensional speckle tracking echocardiography(2D-STE). Methods: Thirty-four patients diagnosed with HCM by transthoracic echocardiography and thirty-four healthy people at the same period were collected. 2D-STE was used to evaluate the longitudinal strain of papillary muscle. The time difference between the time from the starting point of QRS to the peak strain of the two papillary muscles and the circumference angle of papillary muscle, the differences of various parameters between the two groups were compared. Results: The circumferential angle of the two papillary muscles and the area of the anterior lateral papillary muscle were significantly higher in the HCM group than in the control group(P<0.05). The segments of the papillary muscles and the overall longitudinal strain of HCM patients were lower than those of the normal control group(P<0.05). The difference in strain peak time between the two papillary muscles in the HCM group was significantly greater than that in the control group, and the difference was statistically significant(P<0.05). Conclusion: In HCM patients, the papillary muscles move forward, the longitudinal contraction function of the papillary muscles is reduced, and the contraction of the two papillary muscles is not synchronized. Papillary muscle function can be fully evaluated using 2D-STE.
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Received: 21 December 2019
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