In a letter sent to healthcare providers, the U.S. Food and Drug Administration (FDA) validates that Abiomed’s Impella RP heart pump is safe and effective for treatment of right heart failure.  The letter comes after the FDA examined the results from Abiomed’s 18-month post-approval study (PAS) of 42 Impella RP patients. The data shows a 64 percent survival rate and 90 percent heart recovery for the subgroup of PAS patients who met the enrollment criteria of Impella RP’s premarket clinical studies.  That survival rate is, as the FDA writes in its letter, “similar to the premarket clinical study survival rate,” which was 73 percent.