Key result
The loop technique significantly preserved posterior mitral leaflet mobility compared to resection alone, demonstrating a larger postoperative mobile angle (39.3° vs 15.3°, P<0.01).
Why the study?
Does the loop technique preserve posterior mitral leaflet mobility compared to resection and suture in patients undergoing mitral valve repair?
Observational (n=84)
No
Does the loop technique preserve posterior mitral leaflet mobility compared to resection and suture in patients undergoing mitral valve repair?
The loop technique for mitral valve repair preserves posterior mitral leaflet mobility and allows for the implantation of a larger ring, which reduces the mean mitral valve pressure gradient compared to resection techniques.
Answers are grounded in this paper and cite their sources.
May support loop technique to preserve PML mobility in mitral repair; hypothesis-generating and requires randomized confirmation.
BACKGROUND: Recently, the loop technique has been standardized for mitral valve repair, with excellent long-term outcomes reported. This study thus analyzed whether the loop technique could preserve mitral leaflet mobility on trans-thoracic echocardiography. METHODS AND RESULTS: Among 367 concomitant patients who underwent mitral valve repair at Keio University Hospital between January 2007 and December 2014, 304 patients had a prolapse of the posterior leaflet. Of these, 84 cases assessed on echocardiography were retrospectively analyzed for this study. These patients were divided into 4 groups based on the procedure used: (1) group L1 (n=28), loop technique alone; (2) group L2 (n=14), loop technique with resection and suture; (3) group L3 (n=33), loop technique with plication of indentation; and (4) group R (n=9), resection and suture alone. The mean postoperative mobile posterior mitral leaflet (PML) angles in groups L1 and L2 (39.3±16.0°, 37.3±16.0°) were significantly larger than those in groups L3 and R (18.8±15.7°, 15.3±15.7°), respectively (P<0.01). Ring size, age, and mobile PML angle had a statistically significant correlation with the postoperative mean mitral valve pressure gradient (P<0.05). CONCLUSIONS: The loop technique preserved PML mobility and enabled implantation of a larger ring, resulting in a reduced mean mitral valve pressure gradient. (Circ J 2016; 80: 663-667).
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Kitahara et al. (2016) conducted an observational in Prolapse of the posterior mitral leaflet (n=84). Loop technique vs. Resection and suture alone was evaluated on Postoperative mobile posterior mitral leaflet (PML) angle (p=<0.01). The loop technique significantly preserved posterior mitral leaflet mobility compared to resection alone, demonstrating a larger postoperative mobile angle (39.3° vs 15.3°, P<0.01).
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