import re
regex = r"Title:\s*(.*?)\s*Procedure|Title:\s*(.*)"
test_str = ("Title: Anorectal Fistula (Fistula-in-Ano) Procedure Code(s):\n\n"
	"Effective date: 7/1/07\n\n"
	"Title:\n\n"
	"2003247\n\n"
	"or previous effective dates)\n\n"
	"Title:\n\n"
	"ST2 Assay for Chronic Heart Failure\n\n"
	"Description/Background\n\n"
	"Heart Failure\n\n"
	"HF is one among many cardiovascular diseases that comprises a major cause of morbidity and mortality worldwide. The term “heart failure” (HF) refers to a complex clinical syndrome .")
res = []
for m in re.finditer(regex, test_str):
	if m.group(1):
		res.append(m.group(1))
	else:
		res.append(m.group(2))
print(res)

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