A single ultra low dose of THC before ischemia is a safe and effective treatment that reduces myocardial ischemic damage.

Jeannie Herer

Waldman M, Hochhauser E, Fishbein M, Aravot D, Shainberg A, Sarne Y.
 

Abstract

Tetrahydrocannabinol (THC), the major psychoactive component of marijuana, is a cannabinoid agonist that exerts its effects by activating at least two specific receptors (CB1 and CB2) that belong to the seven transmembrane G-protein coupled receptor (GPCR) family. Both CB1 and CB2 mRNA and proteins are present in the heart. THC treatment was beneficial against hypoxia in neonatal cardiomyocytes in vitro.
 
Full Abstract Here:
http://www.ncbi.nlm.nih.gov/pubmed/23537701