Reattempt Percutaneous Coronary Intervention of Chronic Total Occlusions after Prior Failures: A Single-Center Analysis of Strategies and Outcomes

Table 4

Contrast and radiation differences.

	Final successful cases (n = 172)		Final failed cases (n = 40)
	Initial attempt	Successful reattempt	Initial attempt	Failed reattempt
Contrast (mL)	249.37 ± 142.76	297.38 ± 148.96^a	229.12 ± 162.61	317.38 ± 184.42^a,b
Dose of X-ray (mGy)	1739.69 ± 1110.72	2319.11 ± 1397.31^a	1622.36 ± 988.02	2491.28 ± 1178.14^a,b
Time of X-ray (min)	38.63 ± 23.59	46.89 ± 34.10^a	36.88 ± 20.32	48.82 ± 33.66^a,b

Values are mean ± SD. mL, milliliter; mGy, milligray. a, compared to the index attempt,  < 0.01; b, comparison of failed reattempt vs. successful reattempt,  < 0.05.