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Cardiovascular ailments result in a great rate of mortality all over the world. Myocardial infarction is a common presentation of cardiovascular disease. The current work aimed to investigate and compare the cardioprotective potentials of methanolic extracts from the aerial parts from  Bauhinia purpurea  and  Bauhinia madagascariensis  in adrenaline-induced cardiotoxicity in rats. The rats were categorized into five groups as follows: control group, adrenaline-treated group,  Bauhinia purpurea  extract + adrenaline treated group,  Bauhinia madagascariensis+  adrenaline treated group, reference drug (captopril) + adrenaline treated group. The extracts as well as the reference drug were orally administered for 21 consecutive days. On day 22, adrenaline was injected as a single dose for 2 consecutive days. The adrenaline injection caused a significant increase ( p &lt; 0.05 ) in serum cardiac markers (ALT, AST, CK-MB, LDH), angiotensin-converting enzyme (ACE) and matrix metalloproteinase (MMP-9), inducible nitric oxide synthase (iNOS) activities, tumor necrosis factor-α (TNF-α) cardiac lipid peroxides (MDA) levels and a significant decline ( p &lt; 0.05 ) in cardiac reduced glutathione (GSH) levels compared to their corresponding controls. The pretreatment extracts significantly ameliorated ( p &lt; 0.05 ) these alterations. Histopathological investigations supported the biochemical data.  Bauhinia madagascariensis  extract exerted a significant anti-inflammatory activity than that of  Bauhinia purpurea . In addition,  Bauhinia madagascariensis  extract revealed a significant inhibitory activity on ACE compared to that of  Bauhinia purpurea,  ( p &lt; 0.05 ). These data reveal that both extracts had a strong protective activity against adrenaline-induced cardiotoxicity via improving cardiac function, reducing ECG and histopathological changes that could be mediated in part through its anti-oxidant, anti-inflammatory effects, inhibition of ACE, MMP-9, and iNOS.

drug and chemical toxicology

Study of cardioprotective activity of the methanolic extract of the aerial parts of  Bauhinia madagascariensis  compared to  Bauhinia purpurea  against adrenaline-induced myocardial toxicity in rats