Table 1.

Effects of Melissa Officinalis extract on CaCl₂-induced arrhythmia in the different groups of rats

Groups	CaCl2-induced arrhythmia
	VFa		VTb		VPBc
	Incidence (%)	P-value	Incidence (%)	P-value	Incidence (%)	P-value
Control (Saline, 1 mg/kg/day)	100d		100d		100d
Melissa Officinalis Extract (100 mg/kg)	40	< 0.01	50	< 0.01	85	< 0.05
Melissa Officinalis Extract (200 mg/kg)	20	< 0.001	33	< 0.01	71	< 0.05

^aVF: ventricular fibrillation;

^bVT: ventricular tachycardia;

^cVPB: ventricular premature beats;

^dThe data from the control group were considered as 100, and the results were compared to those of the control group expressed as a percentage data.