Table 2: Electrocardiogram changes reported in the included studies.

S. No	Author	Type of study	No of subjects	Results
				P-wave prolongation	QRS Prolongation	QTc Prolongation	ST-segment depressions	T-Wave abnormalities	Atrial Fibrillation
1	Cardy9	Case control	10	9	10
2	Priest10	Case control	37				3	19
3	Uyarel8	Cross control	10	10
4	Aasebo3	Case control	84	71		80			1
Total			141	90	10	80	3	19	1
%				63.8	7	56	2.12	13.47	0.7