English to Japanese Medical Medical: Cardiology Raw Material Data

There are reports in the literature of patients not in arrest that describe the science behind important physiological changes that occur in pregnancy that may influence treatment recommendations and guidelines for resuscitation from cardiac arrest in pregnancy.

Thatが多くて意味が取りづらいのと、題名に挙げた節の意味が分かりません。よろしくお願いします。