PTSMAPercutaneous Transluminal Septal Myocardial Ablation
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Four patients in the PTSMA group failed to complete the procedure, two for multiple side branches, one for a severe blood pressure drop after balloon inflation, and one for acute left heart failure in operation.
The mean follow-up was 44.19 [+ or -] 15.19 months for the PTSMA group and 38.48 [+ or -] 15.93 months for the MMSM group.
As noted in the previously, a similar reduction in basal septal thickness was noted after both MMSM and PTSMA. These observations are similar to the mechanisms by which successful septal myectomy relieves LVOT obstruction.
After surgery, nearly 97% of the patients were in NYHA Class I or II, and after PTSMA, 88% of the patients were in these two classes.
Two deaths occurred in the PTSMA group, both of them suffering acute left heart failure after balloon inflation.
Seven patients suffered second interventions because of recurrent symptoms after the procedure in the PTSMA group, but none required it in the MMSM group.
Although the PTSMA and MMSM groups were well matched in terms of baseline clinical profiles, there may have been bias that led patients to select MMSM instead of PTSMA.