[Not for Publication] UNITED STATES COURT OF APPEALS FOR THE FIRST CIRCUIT No. 97-1930 JAIME LOYOLA-CINTRON, ET AL., Plaintiffs, Appellants, v. BENJAMIN BETANCOURT-AQUINO, ET AL., Defendants, Appellees. APPEAL FROM THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF PUERTO RICO [Hon. Salvador E. Casellas, U.S. District Judge] Before Lynch, Circuit Judge, Coffin and Cyr, Senior Circuit Judges. Astrid Coln-Lede for appellants. Carlos A. Ortiz-Morales, with whom Alfonso Miranda Cardenas and Miranda Cardenas & Cordova were on brief for appellee Garcia Rinaldi. Jose Luis Gonzalez-Castaner, with whom Law Offices of Jose Luis Gonzalez-Castaner and Jose R. Ortiz-Velez were on brief for appellees Betancourt Aquino and Simed. Rafael Mayoral Morales, with whom Latimer, Biaggi, Rachid & Godreau was on brief for appellee Hosital Pavia. April 3, 1998 Per Curiam. Plaintiffs challenge various rulings underlying the dismissal of their wrongful death action against Dr. Raul Garcia Rinaldi, Dr. Benjamin Betancourt Aquino, and Hospital Pavia, for providing negligent post-operative care and supervision to their father. We summarily affirm the district court judgment based on a thorough review of the entire record. On May 11, 1993, plaintiffs' father was admitted to Hospital Pavia and treated by defendant Betancourt for chest pain. The next day defendant Garcia performed emergency coronary by-pass surgery, followed by a second surgery to correct temporary bleeding. During the post-operative recovery period the patient was successfully treated for several episodes of cardiac arrhythmia, the latest having occurred three days prior to his discharge in stable condition. On May 23, three days after discharge, he suffered a cardiac arrest and died despite defendant Betancourt's efforts to resuscitate. The district court correctly granted summary judgment to Dr. Garcia on the ground that plaintiffs failed to present any evidence which, if believed, could have rebutted the presumption under Puerto Rico law that the decedent received reasonable medical care from Dr. Garcia. See Fernandez v. Corporacion Insular de Seguros, 79 F.3d 207, 211 (1st Cir. 1996). Instead, plaintiffs relied exclusively upon the unsupported, conclusory allegations in their complaint. Absent affidavits generating a trialworthy issue, summary judgment was inevitable. See Medina-Munoz v. R.J. Reynolds Tobacco Co., 896 F.2d 5, 8 (1st Cir. 1990); see also Fed. R. Civ. P. 56(e). Plaintiffs further contend that they should have been granted a new trial because the district court refused to allow their expert witnesses, an internist and a pathologist, to testify that defendants Betancourt and Hospital Pavia provided negligent post-operative care. The district court committed no error, let alone manifest error. See United States v. Sepulveda, 15 F.3d 1161, 1183 (1st Cir. 1993). First, one of the witnesses, neither a surgeon nor a cardiologist, acknowledged having nothing "to do with open-heart surgery. It's not my expertise. I have not been trained for it . . . ." The other, likewise not a cardiologist, had never treated either a cardiac patient or a post-operative condition; nor did he examine the decedent, either before or after death. Nor was an autopsy ever performed on the decedent. AFFIRMED.