title: Intramyocardial injection of autologous platelet-rich plasma combined with transmyocardial revascularization.
abstract: Transmyocardial revascularization (TMR) can improve refractory angina but does not consistently demonstrate an effect on myocardial function. Recent studies suggest a synergistic effect between TMR and exogenously supplied growth factors. We evaluated the clinical role of intramyocardial injection of autologous platelet-rich plasma (PRP) in conjunction with TMR. Twenty-five nonrevascularizable patients with class III/IV angina underwent minimally invasive sole therapy TMR during a 5-year period at a single institution. Group 1 (14 patients) underwent TMR alone while group 2 (11 patients) underwent TMR plus injection of PRP (Magellan plasma separator) between TMR channels. Blinded angina assessment and ejection fraction (EF) were measured preoperatively and at 6 months postoperatively. Baseline EF (57 +/- 10% vs. 50 +/- 7%), angina class (3.7 +/- 0.5 vs. 3.7 +/- 0.5), and the number of channels (48 +/- 5 vs. 48 +/- 4) were statistically similar in both groups. At 6 months, two class angina relief was similar in both groups (92% vs. 100%, p = 0.4); however, the TMR + PRP group had a lower average angina score (1.3 vs. 0.4, p = 0.07) and more were angina free (23% vs. 78%, p = 0.04) than the TMR-alone group. EF improved in the TMR + PRP group (-2.0% vs. +9.0%, p = 0.07) compared to the TMR-alone group. Two 30-day morbidities occurred in the TMR-alone group (atrial fibrillation and left pleural effusion) and one mortality occurred in the TMR + PRP group. Intramyocardial injection of autologous PRP combined with TMR may be more efficacious at relieving angina and improving myocardial function than TMR alone.
authors: Peninsula Regional Medical Center, Salisbury, MD, USA. kwehberg@msn.com
authors: K E
authors: KE
authors: Wehberg
authors: G
authors: G
authors: Answini
authors: D
authors: D
authors: Wood
authors: J
authors: J
authors: Todd
authors: J
authors: J
authors: Julian
authors: N
authors: N
authors: Ogburn
authors: K B
authors: KB
authors: Allen
mesh_terms: D002452:Cell Count; D003710:Demography; D005260:Female; D006801:Humans; D007267:Injections; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000378:metabolism*; D018919:Neovascularization, Physiologic; D053657:Platelet-Rich Plasma / Q000378:metabolism*; D013318:Stroke Volume; D014182:Transplantation, Autologous