Modified Transseptal Puncture Technique in Challenging Septa: A Randomized Comparison to Conventional Technique

Table 2

Procedural outcomes of transseptal puncture.

	MOSQ-TSP ()	CONV-TSP ()	value
Failure to cross at first site, (%)	34 (100)	34 (100)	NS
Successful LA access, (%)	34 (100)	25 (73.5)	<0.002
Final LA access, (%)	34 (100)	34 (100)	NS
Median time from FTC to final LA access, seconds (range)	72 s; (37 s–384 s)	326 s; (75 s–1936 s)	<0.002
DAP from FTC to final LA access, mGy/cm^2			<0.002
Median of additional needle punctures	0	2 (1 to 3)	<0.002

FTC, failure to cross the septum at the first attempt of puncture; LA, left atrium; DAP, dose-area product, NS, nonsignificant.