This does raise the possibility of early left ventricular failure, however there is no pulmonary edema and no acute infiltrates.

Question

fragment
run-on
comma splice
complete sentence
Answer:
fragment - (what? missing)
Thanks

Answer 1

The error is a form of run-on called a comma splice. There should be a semicolon after failure.

http://grammar.ccc.commnet.edu/grammar/runons.htm

Answer 2

This does raise the possibility of early left ventricular failure, however there is no pulmonary edema and no acute infiltrates.